JPH0299996A - Automatic accompaniment device - Google Patents

Abstract

PURPOSE:To easily specify various chord progression by reading out special chord progression data in order associatively with reading operation for special rhythm patterns when selecting operation is specified by a selecting means. CONSTITUTION:Rhythm pattern control means 101 and 106 start reading an introduction rhythm pattern and playing an automatic accompaniment when an introduction switch 105 is on, and then enters reading operation for main rhythm patterns after said reading operation. While by an automatic chord progression control means 101-103 and 108, the introduction rhythm pattern begins to be read out, the reading operation for the introduction rhythm pattern is entered and when the data are all read, the reading operation for the main chord progression data is started. Consequently, difficult bass chord progression is performed fully automatically and normal chord progression can be switched by one touch, so that various chord progression can easily be specified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic accompaniment device for an electronic musical instrument, and more particularly to an automatic accompaniment device that specifies a chord progression and performs bass chord accompaniment.

[Conventional technology]

With the spread of electronic musical instruments such as electronic keyboards, electronic wind instruments, and electronic stringed instruments, it has become possible to easily enjoy playing with a variety of musical tones. It is becoming easier to obtain.

Furthermore, many electronic musical instruments equipped with automatic accompaniment devices have been developed in order to obtain a wide variety of performance effects with simple operation.

In this case, automatic accompaniment can be performed using rhythm instrument sounds, bass and chord accompaniment, etc., which enhance musical expressiveness.

Here, in an automatic accompaniment device that performs automatic accompaniment by combining automatic accompaniment using rhythm instrument sounds and automatic accompaniment using bass chord accompaniment, the timing at which the rhythm sounds are generated is, for example, 16 steps (corresponding to a 16th note). Patterns to be paired (hereinafter referred to as rhythm patterns)
specified by. In other words, specify whether or not to generate a rhythm sound for each step, read out the 16-step rhythm pattern sequentially at a constant tempo, and determine and control whether or not to generate a rhythm sound for each step. By controlling the sound generation timing and playing the above 16 steps while repeatedly reading out the sound, a musically rhythmic accompaniment effect can be obtained. Note that a plurality of rhythm sounds may be prepared, and in this case, the above control is performed independently for the plurality of rhythm sounds. Furthermore, the timing at which the chord tones are sounded is similarly specified by a pattern (hereinafter referred to as a chord pattern) consisting of, for example, 16 steps, which is independent of the rhythm pattern, and the timing at which the chord tones are sounded is controlled. That's fine.

Furthermore, the timing at which the bass sound is produced is also independent of the rhythm pattern and chord pattern, for example, 16.
The sound generation timing of the bass sound may be controlled based on a pattern having one set of steps (hereinafter referred to as a base pattern).

At this time, the performer determines how to specify the chord progression of the chord tones that are sounded in the above chord pattern, that is, how to specify the chord type according to the progression of the song. This is performed at any time using a chord progression (called an accompaniment key), or the performer stores a chord progression in advance in a predetermined chord memory and performs automatic accompaniment based on it.

Note that the specification of the bass progression of the bass notes sounded in the bass pattern, that is, how to specify the bass pitch according to the progression of the song, usually depends on the root of the chord type specified in each chord progression. Specify as the pitch of the sound.

[Problem to be solved by the invention]

However, in the conventional example described above, the bass pitch and chord type do not progress unless the performer specifies the chord progression. In this case, especially for beginners, it is very difficult to specify chords one after another using the accompaniment keys during automatic accompaniment, and there is a problem that the desired automatic accompaniment effect cannot be obtained.

Also, even if you store the chord progression in memory in advance,
Beginners have a problem in that they do not know what chord types to specify and in what order, and as a result, they are unable to obtain the desired automatic accompaniment effect.

The object of the present invention is to enable even beginners to easily specify chord progressions, thereby enabling automatic accompaniment with bass chord accompaniment as expected by the performer, and in this case, making it possible to easily specify a variety of chord progressions. The goal is to make it possible to achieve it through manipulation.

[Means to solve the problem]

The present invention is based on an automatic accompaniment device that generates rhythm tones based on a predetermined rhythm pattern and generates bass and chord tones based on predetermined bass patterns and chord patterns to perform automatic accompaniment. Here, the rhythm pattern is a pattern including, for example, a set of 16 steps (corresponding to 16th notes) for specifying the timing at which rhythm sounds are to be produced. Then, in the rhythm pattern, it is specified whether or not to generate a rhythm sound every l step, and this 16-step rhythm pattern is sequentially read out at a constant tempo, and it is determined and controlled whether or not to generate a sound for each step. The timing of the generation of the ``nakara'' note is controlled, and automatic accompaniment using the rhythm note is performed while repeatedly reading out the above 16 steps. Similarly, the chord pattern is a pattern independent of the rhythm pattern, for example, 16 steps 1 & 11, for specifying the timing at which chord tones are sounded, and the timing at which the chord tones are sounded is controlled based on this pattern.

Furthermore, the bass pattern is also a pattern that is independent of the rhythm pattern and chord pattern and is made up of a set of 16 steps, for example, to specify the timing at which the bass sound is produced, and based on this pattern, the timing at which the bass sound is produced is determined. control.

In the automatic accompaniment device described above, first, the pattern storage means is a means for storing a normal rhythm pattern and at least one type of special rhythm pattern.

Here, the normal rhythm pattern is, for example, the main rhythm pattern, and the special rhythm pattern is, for example, a fill-in rhythm pattern, an ending rhythm pattern, an intro rhythm pattern, or the like.

The chord progression storage means is a means for storing normal chord progression data and at least one type of special chord progression data. In this case, each chord progression data includes, for example, scale data that specifies the scale, chord name data that specifies the chord name, and tone length data that specifies the length at which the chord type determined by the scale data and chord name data is to be sounded. It consists of multiple data sets consisting of and. Further, the normal chord progression data is, for example, main chord progression data, and the special chord progression data is, for example, fill-in chord progression data, ending chord progression data, or intro chord progression data.

Next, it has selection means for selecting each of the special rhythm patterns. The means is, for example, a fill-in switch, an ending switch, an intro switch, or the like.

Further, the rhythm pattern control means sequentially reads out the normal rhythm pattern, for example, the main rhythm pattern, from the pattern storage means during automatic accompaniment, and when the selection means performs a selection operation, the corresponding special rhythm pattern, for example, is read out from the pattern storage means in normal times. It is a means for sequentially reading out a fill-in rhythm pattern, an ending rhythm pattern, or an intro rhythm pattern, and controlling the sounding timing of the rhythm sound based on the read rhythm pattern. The means reads one step at a time from among the rhythm patterns stored in the rhythm pattern storage means corresponding to the selection operation by the selection means, and if sound generation is instructed for each step, controls the sound production. It is a means to do so.

Further, the automatic chord progression control means sequentially reads out the normal chord progression data or the special chord progression data from the chord progression storage means in conjunction with the readout operation of the normal rhythm pattern or the special rhythm pattern during automatic accompaniment. The present invention is a means for sequentially specifying the type of chord sound to be sounded in the chord pattern and the pitch of the bass sound to be sounded in the bass pattern based on the read chord progression data. The means reads, for example, one set of chord progression data to be produced in conjunction with the rhythm pattern out of the chord progression data stored in the chord progression data storage means, and reads out the scale data and the chord for each set. This is means for specifying the type of chord note determined by the name data and the interval of the bass note determined by the scale data by the length determined by the note length data.

[For production]

The effects of the present invention are as follows.

First, for example, the normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is a fill-in rhythm pattern, the normal chord progression data is main chord progression data, the special chord progression data is fill-in chord progression data, and the selected When the means is a fill-in switch, when the fill-in switch is pressed during the readout operation of the main rhythm pattern, the rhythm pattern control means changes to the readout operation of the fill-in rhythm pattern and reads out the fill-in of a predetermined length. After reading the rhythm pattern, the process returns to the reading operation of the main rhythm pattern. On the other hand, the automatic chord progression control means changes to the readout operation of the fill-in chord progression data after the rhythm pattern control means finishes the readout operation of the fill-in rhythm pattern during the readout operation of the main chord progression data. After reading the fill-in chord progression data having a length of , the process returns to the reading operation of the main chord progression data.

Next, for example, the normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is an ending rhythm pattern, the normal chord progression data is main chord progression data, the special chord progression data is ending chord progression data, and the When the selection means is an ending switch, when the ending switch is pressed when the main rhythm pattern is read out, the rhythm pattern control means selects the ending rhythm at the timing when the main rhythm pattern is read to the end. Change to pattern read operation.

On the other hand, the automatic chord progression control means changes the reading operation to the ending chord progression data at the same time when the rhythm pattern control means starts the reading operation of the ending rhythm pattern during the reading operation of the main chord progression data.

Further, for example, the normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is an intro rhythm pattern, the normal chord progression data is main chord progression data, the special chord progression button is intro chord progression data, and the selected When the means is an intro switch, the rhythm pattern control means starts reading out the intro rhythm pattern to start automatic accompaniment when the intro switch is pressed, and reads the intro rhythm pattern of a predetermined length. After reading is finished, the process moves to the reading operation of the main rhythm pattern. On the other hand, the automatic chord progression control means changes to the readout operation of the intro chord progression data at the same time as the rhythm pattern control means starts the reading operation of the intro rhythm pattern at the start of automatic accompaniment, After reading the intro chord progression data, the main chord progression data is read out.

Here, the base pattern and chord pattern are also 1
In addition to different types, a normal pattern and at least one special pattern may be prepared for each pattern, and the patterns may change in synchronization with the rhythm pattern.

As mentioned above, all difficult bass chord progressions are performed automatically, and the performer can easily switch from a normal chord progression to a special chord progression with a simple switch operation, making it easy to create a variety of chord progressions. It is possible to specify. Furthermore, in this case, the chord progression data is also switched in conjunction with the rhythm pattern switching operation, and the way in which the chord progression data is linked can be controlled so that the accompaniment is musically effective, so even beginners can You can easily enjoy advanced automatic accompaniment.

〔Example〕

G Hereinafter, the present invention will be described in detail with reference to the drawings.

(Shuashi Charcoal Masters) FIG. 1 is a block diagram of an embodiment of the present invention.

A central control unit (CPU, hereinafter the same) 1 is a control device that controls the overall operation, and has a flag counter register group (FCR1 and below) 1011 therein.

The CPUI O1 includes a keyboard section 104 and a switch section 105.
, pattern memory section 106, chord progression memory section 107
, a code judge section 108, and a timer clock generator 102 are connected. In addition, the timer clock generator 1
Rhythm counter (RC1 and below) 103 that counts up by +1 based on the timer clock from 02
is connected. The CPU 10I includes a melody sound generation section 109, an accompaniment sound generation section 110, and a rhythm sound generation section 1.
1.1 to emit musical tones via the sound system 112.

As illustrated in the accompaniment sound generation section 110, the melody sound generation section 109, accompaniment sound generation section 110, and rhythm sound generation section 111, for example, determine the pitch and basic waveform of the generated musical tone.
CO (Digital controlled Osci
llator) 1101, an envelope generator 1102 that determines temporal changes in its characteristics, and DCOllo
D CW (
(Digital Controlled Wave)
1103, an envelope generator 1104 that determines temporal changes in its timbre characteristics, and an envelope generator 1104 that controls the volume of the output waveform of the CW 1103 [) CA (D
Digital Controlled Amplifier
r) 1105, an envelope generator 1106 that determines temporal changes in the volume characteristics, etc.;
By changing the parameters given to the envelope generators 1102, 1104, 1106, etc., various musical sound waveforms can be generated. Note that the configuration is not limited to the above configuration, and for example, the rhythm sound generation unit 111 stores the musical sound waveform of an actual rhythm instrument in a memory, and reads and outputs it in synchronization with a rhythm pattern to be described later. It may also be configured as a PCM sound source type.

The sound system 112 includes a melody sound generator 109,
It is a means for amplifying musical sound waveforms output from the accompaniment sound generating section 110 and the rhythm sound generating section 111 and emitting the sound, and is, for example, an amplifier, a speaker, or the like.

FIG. 2 shows the appearance of the keyboard section 104 shown in FIG. 1.

As shown in the figure, it is composed of a plurality of keys 1041, and in this embodiment, it generates a scale for one five octave from C2 of the 0 octave (OC=0) to 07 of the 5 octave (OC=5). can. Among these, accompaniment key 1 from 02 to B3
042 functions as a key for specifying a normal scale during normal performance, but functions as a key for specifying a chord in a normal mode during automatic accompaniment, which will be described later.

Also, adjacent to the keyboard section 104, the switch section 1 of FIG.
05 are arranged as shown in FIG.

The switch section 105 is a group of switches for making various settings during automatic accompaniment.

Rhythm switch (hereinafter referred to as SW) 105
1 consists of six switches #1 to #6, and by pressing any one of them, the rhythm during automatic accompaniment can be specified. In this case, each of the rhythms 5W1051 from #1 to #6 is assigned, for example, rock, waltz, march, sangha, folk, and fusion rhythms.

The auto chord progression 5W1052 is a switch for specifying an auto chord progression mode, which will be described later, and when this is pressed, the LED above it lights up.

Start 5W1054 and stop 5W1055 are switches for starting and stopping automatic accompaniment.

Intro 5W1053, fill-in 5W1056, and ending 5W1057 are switches for starting intro performance, fill-in performance, and ending performance, respectively.

Tempo up SWI 05 B and tempo down 5W1
059 are switches for increasing and decreasing the tempo of automatic accompaniment, respectively.

(Disaster ship opening ■ Mutual supervision action) First, the general operation of the embodiment having the above configuration will be explained.

First, during normal performance without automatic accompaniment, key information KI shown in FIG. 4 is input from the keyboard section 104 of FIG. 1.

Key information KI is 0N10FF information OF indicating key press/release.
, a key code KC indicating one of the 12 scales, and an octave code OC indicating the octave. Then, any key 1041 (third
When the key (FIG.) is pressed, the CPU 10I generates pitch information corresponding to the pressed key based on the key code KC and octave code OC, and supplies it to the melody sound generating section 109. As a result, the melody sound generating section 109 generates a melody sound based on the pitch information, and the sound is emitted via the sound system 112.

Next, during automatic accompaniment, it is possible to specify two types: normal mode and auto chord progression mode.

First, in the normal mode, the performer can select one of six types of rhythms such as rock, waltz, etc. After that, when automatic accompaniment is started, the first
The rhythm accompaniment sound generation unit 111 shown in the figure starts producing rhythm accompaniment sounds using a plurality of rhythm instrument sounds in a rhythm pattern consisting of 16 independent steps for each rhythm instrument sound, and is repeated.

In this case, 16 steps correspond to, for example, one measure on the musical score, and therefore, for example, the same rhythm pattern is repeated for each measure.

In this state, the player presses the keyboard section 104 in FIG. 1 or 2.
By pressing any accompaniment key 1042 between 02 and B3, the accompaniment sound generating section 110 in FIG.
With a bass pattern consisting of six steps, accompaniment tones based on a predetermined bass tone are started and repeated. At the same time, the accompaniment sound generating section 110 of FIG. Accompaniment tones based on a chord consisting of four tones are started and repeated.

In this way, in the normal mode, for example, if a rock rhythm is selected, in addition to the rhythm accompaniment of a rock rhythm pattern using a plurality of rhythm instrument sounds, the player can also use the rhythm accompaniment specified by the accompaniment key 1042 in FIG. Based on the chord sound,
Bass accompaniment with rock bass pattern and bass tone,
Automatic accompaniment can be created using rock chord patterns and chord tones. At this time, the player selects key 1 of the scale higher than B3 on the keyboard section 104 in FIG.
041, the player can freely play a melody along with the accompaniment.

Next, in auto chord progression mode, when you select a rhythm and start automatic accompaniment, just like in normal mode, the rhythm accompaniment starts and repeats as in normal mode, and at the same time, the rhythm accompaniment starts and repeats. Bass accompaniment and chord accompaniment also start with the pattern and chord pattern. In this case, the bass pattern and chord pattern repeat a predetermined 16-step pattern corresponding to the selected rhythm, but the bass note and chord note specified at this time follow a predetermined chord progression corresponding to the selected rhythm. is automatically specified over multiple measures.

In this way, in the auto chord progression mode, for example, if you select a rock rhythm, in addition to the rhythm accompaniment of the rock rhythm pattern using multiple rhythm instrument sounds, you will also receive the bass accompaniment of the rock bass pattern and bass progression, and the rock chords. Automatic accompaniment can be performed by using pattern and chord progression chord accompaniment. Then, the performer can freely perform a melody or the like in accordance with the accompaniment using any key 1041 of the keyboard section 104 shown in FIG.

In addition, in both normal mode and auto chord progression mode, the performer can select the intro SWI O shown in Figure 3.
53, fill-in 5W1056 and ending 5W1
057, various performance effects can be added, and the rhythm 5W1051 in FIG. 3 can be switched even during the performance.

(Normal mode -) Next, detailed operations in normal mode during automatic accompaniment will be explained. FIGS. 5 to 10 are operation flowcharts when the CPUlol executes a program (not particularly shown), particularly those related to the normal mode.

First, FIG. 13 shows FORIO II shown in FIG. 1, and among them, those related to the operation in normal mode are listed below.

Rhythm number register RR (Fig. 13(a)) i 3rd
A 3-bit register pattern register PR (Fig. 13(b)) that indicates which rhythm is currently specified among the rhythms 5W1051 of #1 to #6 in the figure. 2-bit register Prism number register PRR (Fig. 13 (C))
i A 3-bit register accompaniment flag BF indicating the rhythm number immediately before the current rhythm is specified (see Fig. 13).
e)) i 1-bit flag tempo record register TR (Figure 13(f)) that indicates whether automatic accompaniment or autorhythm is currently being performed; A 5-bit register that indicates the current tempo. The rhythm counter RC counts up based on the auto chord progression flag ACR (Fig. 13 (g)); the 1-bit flag pattern change standby flag PTF (Fig. 13 (h) )
); Rhythm is switched or ending 5W105
7 (Figure 3) is pressed and until the pattern is actually switched, a 1-bit flag indicating whether or not the pattern is on standby is pressed, and the normal mode is set according to the operation flowcharts of Figures 5 to 10. The operation of the mode will be explained.

Written by Toyokami Shita First, when the performer turns on the power to the main unit (not shown), the main operation flowchart shown in FIG. 5 starts, and initial raw processing is first performed at 8501.

Details of this process are shown in FIG. In other words, 56 in the same figure
Various flags are initialized in o1-S 610. Note that the reason why the contents of the tempo data register TR are initialized to 16 is to set the tempo to an intermediate value since the register can take values from 0 to 31 as described later. Further, the registers set in 5606 and 5610 are used during the operation of the autocode progression mode, which will be described later. After these processes, the initial process is terminated (5609-3610).

After the initial processing in FIG. 5 8501, 5502~
The processing loop of 5506 is repeated.

First, in 5502, tempo processing is performed. Details of this process are shown in FIG. That is, at 5701, it is determined whether or not tempo up 5W1058 in FIG.
If it is determined that W has been pressed, the value of the tempo data register TR is incremented by 1 in 5704, the tempo is increased, and the tempo processing is ended (S704-3703). 5701(7)
If the determination is NO, it is determined in step S702 whether or not the tempo down 5W1059 in FIG.
The value of R is decreased by 1, the tempo is decreased, and the tempo processing is ended (S705-3703). Note that the value of the register is controlled so that it does not become less than O or more than 31, although not specifically shown. If the determination in step 5702 is No, the tempo processing ends without performing tempo control (S702→
S 703).

After the tempo processing in FIG. 5 3502, initial rhythm switching processing is performed in 5503. The details of this process are shown in FIG. That is, it is determined at 5801 whether or not the rhythm 5W1051 in FIG.
01→5802, a value corresponding to the rhythm number of rhythm 5W1051 is set in the rhythm number register RR, the rhythm is switched, and the initial rhythm switching process is ended (S803-8804). Here, in Figure 13 (a
), values from 0 to 5 are set in 3-bit binary numbers corresponding to rhythm numbers #1 to #6 (see also FIG. 3). On the other hand, if the rhythm 5W 1051 has not been switched and the determination in 5801 is No, the initial rhythm switching process ends without doing anything (S801-3804).

After the initial rhythm switching process of 3503 in FIG. 5 above, 550
At step 4, it is determined whether auto code progression SWI 052 in FIG. 3 has been pressed. Currently, in the normal mode, the SW is not pressed, so the determination is NO.

Subsequently, in step 5505, it is determined whether or not the intro 5W 1053 in FIG. 3 has been pressed. The case where the button is pressed will be described later.

If the determination at 5505 is No, it is determined at 5506 whether or not the star SW 1054 in FIG. 3 has been pressed.

star) If SW1054 is not pressed, the above 550
The process of steps 2 to 5506 is repeated, and the process waits until any one of the auto chord progression SWI O52, intro 5 WIO 53, or start 5 W 1054 in FIG. 3 is pressed.

When the player presses START 5W1054 in FIG. 3, playback of only rhythm sounds begins.

First, after the determination in 3506 becomes YES, it is determined in 3509 whether the content of the accompaniment flag BF is 1, that is, whether automatic accompaniment or autorhythm is being performed. now,
Since the flag is initially set to 0 in the initial processing at 5501 (3608 in FIG. 6), the autorhythm is initially in progress and the determination at 5509 is NO.

Subsequently, if the performer does not press the accompaniment key 1042 shown in FIG. 2, the determination at 5519 becomes No, and the rhythm reproduction process at 5514 is performed. The details of this process are shown in FIG.

First, in steps 5901, 5902, and 5903, it is determined whether the value of the pattern register PR is 1.2 or 3, that is, whether the pattern to be automatically accompanied is a fill-in pattern, an intro pattern, or an ending pattern. When the performer presses the start 5W1054, the register is initialized to O by the initial processing in 5501 (3605 in Figure 6), so the pattern starts with this, and all determinations in 5901 to 5903 are NO. The process then proceeds to step 3904.

In S904, it is determined whether the value of the pattern change standby flag PTF is 0 or not. The function of this flag will be described later, but since the flag is initially set to O in the initial processing of 5501 (3607 in Figure 6),
The determination in step 5904 is NO, and the process proceeds to step 5905.

At step 5905, the step indicated by the counter value of the RC (rhythm counter) 103 in FIG. 1 is read out of the 16-step main rhythm pattern corresponding to the rhythm number indicated by the rhythm number register RR. Now, CP
The pattern memory unit 106 connected to the UI 01 includes:
A rhythm pattern (chord pattern and bass pattern will be described later) having a structure as shown in FIG. 14 is stored.

As shown in the figure, the rhythm pattern consists of four patterns: a main pattern, a fill-in pattern, an intro pattern, and a ending pattern.Furthermore, each of these patterns has 16 rhythms of 0 to 15 for each rhythm of #1 to #6. It consists of a pattern of steps. In FIG. 15(a), the first
The rhythm pattern of each 16 steps in Figure 4 is shown. As shown in the figure, during automatic accompaniment, it is possible to specify whether or not a rhythm sound is to be generated for each step using a binary number of 0 or 1 for each of the eight rhythm instrument sounds. Here, BD is the bass drum sound, SN is the snare drum sound, CH is the closed high hat sound, OH is the open high hat sound, and T1 to T2 are the tom 1 sounds.
~Three toms, CY is a cymbal sound. From these configurations, the CPU 8905 in FIG.
O1 is the first pattern stored in the pattern memory section 106.
Among the main rhythm patterns shown in Figure 4, the rhythm numbers (#1 to #6) corresponding to the values indicated by the rhythm number register RR are
R in Figure 1 from the main rhythm pattern of
Read the step corresponding to the counter value of e2O3.

Following the above operation, at 5906 in FIG. 9, an instruction is given to the rhythm sound generation section 111 in FIG. As shown in FIG. 151M(a), in order to generate about eight types of rhythm tones in parallel, the above operation is also necessary for eight tones, but this is because the rhythm sound generation section 111 in FIG. 1 performs a time-division operation. By doing this, each rhythm sound can be performed independently.

As a result, the rhythm sound generation section 111 generates rhythm sounds for each rhythm sound at timings based on the rhythm pattern, and the sounds are emitted via the sound system 112.

When the processing in 5906 is completed, the process proceeds to 8907, and 1
The rhythm sound playback process for the steps ends.

When the rhythm reproduction process for one step is completed at 3514 in FIG. 5, the routine waits for input of a timer clock from the timer clock generator 102 in FIG. 1 by repeating 5515.

When the timer clock is input, R in FIG.
e2O3 is counted up.

After going through the processes of 5517 and 5518 (described later), each determination of 5509 and 5519 becomes No (these will also be described later), and the rhythm reproduction process of 5514 is performed again. In this case, at 5905 in FIG. 9, Re2O in FIG.
3 has been incremented by +1, the rhythm numbers (#1 to ##) corresponding to the values indicated by the rhythm number register RR out of the main rhythm pattern of FIG. The step read from the main rhythm pattern (any one of 6) is one step ahead of the previous processing. Then, in 5906 of FIG. 9, rhythm sound generation processing is performed in accordance with the read steps.

As mentioned above, 5509 → 5519-3514 in Figure 5
→By repeating the loop processing from 5515 to 551B-3,509, the main rhythm pattern in FIG.
The 16-step main rhythm pattern of the rhythm number (any one of #1 to #6) corresponding to the value indicated by the rhythm number register RR is sequentially read out, and rhythm sounds are generated in accordance with the rhythm pattern.

In this case, Re2O3 in FIG. 1 is a hexadecimal counter, and after counting up to step 15, it returns to step 0 again, so each rhythm sound is repeatedly sounded for a predetermined 16 steps. These 16 steps correspond to, for example, one bar on the musical score. That is, each of the approximately eight types of rhythm tones during automatic accompaniment is played repeatedly in a fixed rhythm pattern for each bar.

In the above operation of reproducing only the rhythm sound, the sounding speed of the rhythm sound is the speed at which Re2O3 in FIG. 1 is counted up at 8516 in FIG. Determined by the speed at which you type.

The input timing of this timer clock is determined by the CPUI O1 in FIG.
31 levels are determined depending on the value of ~31. The value of the tempo data register TR is initialized to an intermediate value of 16 in the initial processing at 3501 in FIG.
02), and can also be changed at 8502 in FIG. 5 before automatic accompaniment.

In addition to this process, the performer also performs tempo up 5W105B or tempo down 5W10 in FIG. 3 during the rhythm sound playback.
By operating 59, the value of the tempo data register TR can be changed at 3517 in FIG. This process consists of 5
This is exactly the same as the tempo processing in step 502, and is shown in FIG. 7, which has already been described.

Through the above processing, the performer can change the tempo of the rhythm sound being produced even during automatic accompaniment.

In the above rhythm sound only playback operation, which rhythm number of the main rhythm pattern #1 to #6 is selected among the main rhythm patterns shown in FIG. 14 is determined by the values 0 to 5 indicated by the rhythm number register RR. Corresponding #1 to #
The rhythm number 6 is selected.

This rhythm number register RRO value is changed in step 3503 of FIG. 5 before the automatic accompaniment starts, but even when the rhythm number register RRO value is changed during the playback of the rhythm sound, the rhythm number register RRO value of #1 to #6 in FIG.
By selecting the desired one from WI 051,
You can change the rhythm pattern arbitrarily. This operation is the fifth
This process is realized as a part of the various switching processes 3518 in the figure, and the details of the process are shown in FIG.

First, the determinations in S1001 to S1003 are all No (this will be described later), and the process proceeds to step 51004. Here, if the rhythm 5W1051 in FIG. 3 is not switched, the determination in S1004 becomes No, and the 5IO1
At step 3, the various switching processes at 3518 in FIG. 5 are completed.

On the other hand, if the same SW is switched, the determination in step 31004 becomes YES, and the process proceeds to steps S1005 and S1006.

In S1005, the previous rhythm number register RR
Copy the key to the Brillithm number register PRH. In the next step 31006, a value corresponding to the rhythm number of the rhythm SWI O51 is set in the rhythm number register RR to switch the rhythm.

Next, in step 31007, it is determined whether the counter value of Re2O3 (indicating the next step to be sounded) in FIG. It will be judged.

If the determination in S1007 is YES, that is, the timing is just right, the process proceeds to S1008, where it is determined whether the value of the autochord progress flag ACH is 1 or not.

The current mode is normal mode, and the contents of ACR are still initialized to 0 in the initial processing at 3503 in Figure 5 (3603 in Figure 6), so this determination is No and 310
Proceed to step 12. In S1012, the value of the pattern change standby flag PTF is set to 0, and then in S10
The process proceeds to step 13 and the various switching processes shown in FIG. 5 3518 are ended. In other words, the PTF value becomes 0 at exactly the right timing of the 16-step main rhythm pattern.

On the other hand, if the determination in S1007 is No, that is, the timing is in the middle of the 16-step main rhythm pattern,
After the process proceeds to step 1014 and the value of the pattern change standby flag PTF is set to 1, the value of the pattern change standby flag PTF is set to 1.
The various switching processes in step 8 are completed. That is, at a timing in the middle of the 16-step main rhythm pattern, the value of PTF becomes 1.

After changing the value of the rhythm number register RR and setting the pattern change standby flag PTFO value as described above, the determination of 5509.5519 in FIG. 5 is No.
Then, the rhythm reproduction process of 5514 is started again.

Here, if the rhythm changes at just the right timing of the main rhythm pattern of 16 steps, the value of the pattern change standby flag PTF is 0, so after going through steps 5901 to 5903 in FIG. becomes YES. Therefore, in the next step 3905, the rhythm number corresponding to the new value indicated by the rhythm number register RR due to the rhythm switching among the main rhythm patterns of FIG. 14 stored in the pattern memory section 106 of FIG. The main rhythm pattern is sequentially read out from step O, and thereafter, rhythm sounds are produced using the changed rhythm pattern.

On the other hand, if the rhythm is switched in the middle of the 16-step main rhythm pattern, the pattern change standby flag PTFO value is 1, so 5901 to 5901 in FIG.
After passing through 5903, the judgment of 5904 becomes No and 390
Proceed to step 8.

At step 5908, among the main rhythm patterns shown in FIG. 14 stored in the pattern memory section 106 shown in FIG.
Read the step corresponding to the counter value. here,
Since the value corresponding to the rhythm number before the rhythm is switched is stored in the prerhythm number register PRR, the process does not proceed to 5906 until the value of Re2O3 in FIG. 1 is determined to be 15 in the next step 3909. The rhythm sound is produced using the original rhythm pattern before the rhythm is switched.

Then, the loop 8509-351B in Figure 5 allows 5
The above rhythm reproduction process of 514 is repeated, and 3 of FIG.
When the value of Re2O3 in FIG. 1 becomes 15 in 909, that is, when the rhythm pattern to be generated next becomes the final 15 steps, the determination becomes YES.
After the next determination in 3910 is NO (because it is normal mode, the value of ACR is O), the value of the pattern change standby flag PTF is returned to O in 5913, and the process proceeds to 3906 to check the pattern change before the rhythm is switched. The final step of the rhythm pattern is sounded. After this operation, 5509 in FIG.
~5518 loop and enters the rhythm playback process at 5514 again, PTF is set to O, so 390 in Figure 9
4 becomes YES, and in step 5905, the new value indicated by the rhythm number register RR is changed due to the rhythm being switched among the main rhythm patterns shown in FIG. 14 stored in the pattern memory section 106 shown in FIG. The main rhythm pattern of the rhythm number corresponding to is read out sequentially from step 0, and from then on, rhythm sounds are produced using the changed rhythm pattern.

In this way, when the rhythm is switched at a timing in the middle of a 16-step main rhythm pattern, the main rhythm pattern before the rhythm switch is sounded until a good timing is reached, and then the new main rhythm pattern is switched.

The operation when the performer presses the fill-in 5W 1056 in FIG. 3 while the rhythm reproduction process 5514 is being repeated in the loop 5509 to 5518 will be described. In this case, the rhythm sound is generated using the fill-in rhythm pattern from that timing until the 15th step, and then the main rhythm pattern is returned to.

The switching preparation process for this purpose is performed in various switching processes 3518 in FIG. That is, in FIG. 10, since the determination in S 1001 is YES, S 1
The process moves to step 015, where the value 1 is set in the pattern register PR, and the various switching processes 8518 in FIG. 5 are ended in step S1013.

After the value of the pattern register PR is changed as described above, the determination at 5509 and 5519 in FIG. 5 becomes NO, and the rhythm reproduction processing at 5514 is started again.

In FIG. 9, since the PR=1, the determination in 5901 becomes YES, and the process proceeds to 8914. 5914, the first pattern stored in the pattern memory section 106 in FIG.
Among the fill-in rhythm patterns in FIG. 4, the step corresponding to the counter value of Re2O3 in FIG. 1 is read out from the fill-in rhythm pattern of the rhythm number corresponding to the value indicated by the rhythm number register RR.

Thereafter, until the next step 5915 determines that the value of Re2O3 is 15, the process proceeds to 5906 and rhythm sounds are generated in the fill-in rhythm pattern.

As shown above, even if the rhythm is not switched in the middle of the 16-step main rhythm pattern, it is immediately changed to the fill-in rhythm pattern. Thereby, a fill-in effect can be added to the rhythm sound being generated at the timing when the performer presses the fill-in 5W1056 in FIG. 3.

Based on the above operations, the rhythm playback process of 5514 is repeated through the loop of 5509 to 5518 in FIG.
At 8915 in Figure 9, the value of PCI03 in Figure 1 is 1.
5, that is, when the next rhythm pattern to be generated is the final 15 steps, the determination at 8915 becomes YES and the process proceeds to 3916.

At 8916, the contents of the pattern register PR are returned to 0, and preparations are made to return to the main rhythm pattern. Continue,
Processes 5916 to 5919 are performed, and these processes are performed in an autochord progression mode, which will be described later. After these processes, the process advances to step S906, where the rhythm sound of the final step of the fill-in rhythm pattern is generated.

After the above operation, when the loop of S509 to S5518 in FIG.
is set to O, the determinations in steps 5901 to S903 in FIG. 9 become NO, and the process returns to the sound generation operation based on the main rhythm pattern.

5514 (7
) The operation when the performer presses the ending 5W 1057 in FIG. 3 while the rhythm reproduction process is being repeated will be explained. In this case, after the rhythm tones are generated up to a point with good separation using the main rhythm pattern, the rhythm tones are generated using the 16-step ending rhythm pattern, and the automatic accompaniment using the rhythm tones is ended.

The switching preparation process for this purpose is performed in various switching processes 8518 in FIG. That is, in FIG. 10, since the determination in S 1002 is YES, S 1
The process moves to step 016, where the value 3 is set in the pattern register PR, and the process proceeds to step S1007.

In S1007, the Re2O3 counter value in Figure 1 is 0.
In other words, it is determined whether or not the actual timing of the 16-step rhythm pattern is just right.

If the judgment of S 1007 is YES, that is, the timing is just right, the judgment of 3100B is NO and 3
Proceed to process 1012 and set the pattern change standby flag P
After the value of TF is set to 0, the various switching processes 3518 in FIG. 5 are ended in S1013. That is, as in the case of rhythm switching during the rhythm L sound reproduction operation, the value of the PTF becomes 0 at the perfect timing of the 16-step main rhythm pattern.

On the other hand, if the determination in S1007 is NOl, that is, the timing is in the middle of the 16-step main rhythm pattern,
After proceeding to step 1014 and setting the value of the pattern change standby flag PTF to 0, step S1013 to FIG.
18 various switching processes are completed. In other words, at the timing in the middle of the 16-step main rhythm pattern, the PTF
The value of becomes 1. This is also the same as the case of rhythm switching.

After the value of the pattern register PR is changed and the value of the pattern change standby flag PTF is set as described above, the determination at 5509 and 5519 in FIG. to go into.

Then, the determination at 8903 in FIG. 9 becomes YES, and 5
The program then proceeds to 920 to begin processing the ending rhythm pattern.

Here, at the perfect timing of the 16-step main rhythm pattern, the ending 5W10 in Figure 3 is played.
When 57 is pressed, pattern change standby flag PT
Since the value of F is 0, the determination in 5920 is YES. Therefore, in the next step 3921, among the ending rhythm patterns of FIG. 14 stored in the pattern memory section 106 of FIG. 1, the ending rhythm pattern of the rhythm number corresponding to the value indicated by the rhythm number register RR is changed from step 0. are read out sequentially, and then the next 59
59 until the Re2O3 value is determined to be 15 at 22.
Proceeding to step 06, rhythm sounds are produced in the ending rhythm pattern.

Then, the loop of 5509 to 5518 in FIG.
The above rhythm playback process of 514 is repeated, and Re2O3
When the value of becomes 15, that is, when the next rhythm pattern to be sounded is the final 15 steps, 892
The determination in step 2 is YES, and in step 5923, the final step of the ending rhythm pattern is sounded.

After this operation, the process jumps from 5923 to the process of S1017 via the path shown in FIG. And the judgment of S1017 is No
(In the normal mode, the value of ACR is O.) Therefore, the process jumps from 51017 to the process 5603 and subsequent steps via the route shown in 5501 in FIG. After this process, after the initial process of 3501 in FIG. 5 is performed (processing after 3603 in FIG. 6),
The process from 5502 to 5506 is repeated and the process waits until any of the auto chord progression 5W1052, intro 5W1053, or start 5WIO54 in FIG. 3 is pressed. Note that the initial settings of the rhythm number register RR and tempo data register TR of 5601 and 5602 in Fig. 6 are not performed, and when the next button (Star) SW1054 etc. is pressed, automatic accompaniment is performed using the previous rhythm number and tempo. begins.

On the other hand, if ending 5W1057 in Fig. 3 is pressed at a timing in the middle of the 16-step main rhythm pattern, the pattern change standby flag PTFO value is 1, so the determination in 3920 in Fig. 9 will be No and the process will proceed to S924. .

In S924, among the main rhythm patterns shown in FIG. 14 stored in the pattern memory section 106 shown in FIG. 1, the main rhythm pattern of Re2O3 shown in FIG. Read the step corresponding to the counter value. That is, until the value of Re2O3 in FIG. 1 is determined to be 15 in the next step S909, the process advances to 8906 and rhythm sounds are generated using the main rhythm pattern.

Then, through the loop of S509 to S518 in FIG.
The above rhythm reproduction process of 514 is repeated, and 3 of FIG.
When the value of Re2O3 in FIG. 1 becomes 15 in 909, that is, when the rhythm pattern to be generated next becomes the final 15 steps, the determination becomes YES.
After the next determination in 3910 is NO (because it is the normal mode, the ACR value is 0), the value of the pattern change standby flag PTF is returned to 0 in S913, and the process advances to 3906 to start the final step of the main rhythm pattern. pronounced.

After this operation, when the loop of S509 to S518 in FIG.
is set to 0, the determination at 8920 in FIG. 9 becomes YES, and the subsequent 16 steps are S920-S.
Through the processing of 921 -S 922 -S 906,
Rhythm sounds are produced using the ending rhythm pattern.

Then, when the rhythm sound generation process is repeated and the value of Re2O3 becomes 15, the determination in S922 becomes NO, and after the final step of the ending rhythm pattern is generated in S923, the automatic Ends the accompaniment movement.

As shown above, when the automatic accompaniment ends, the performer
By pressing the ending SWIO57 shown in the figure, an ending effect can be easily added to the rhythm pattern.

The operation when the performer presses the intro SWI 053 in FIG. 3 to start the rhythm reproduction process will be described. In this case, after first playing the rhythm sounds for 16 steps in the intro rhythm pattern,
Shift to the rhythm sound production operation using the main rhythm pattern.

First, in the standby state due to the processing loop of 5502 to 5506 in FIG.
When you press 053, the judgment of 5505 becomes YES and 5
The process advances to step 507, where the value 2 is set in the pattern register PR, and the intro rhythm pattern mode is entered. After that,
Similar to when the start 5W1054 (Fig. 3) was pressed, the judgments of 5509 and 5519 are NO, and 551
Step 4 begins the rhythm playback process.

In this case, the determination at 8902 in FIG. 9 is YES and 39
Proceed to step 26. 5926, the pattern memory section 1 in FIG.
Among the intro rhythm patterns shown in FIG. 14 stored in step 06, the intro rhythm patterns of rhythm numbers corresponding to the values indicated by the rhythm number register RR are sequentially read out from step 0.

After that, in the next 3927, the value of Re2O3 in Figure 1 is 15
Until it is determined that this is the case, the process advances to S906 and rhythm sounds are generated using the intro rhythm pattern.

Based on the above operations, the rhythm playback process of 5514 is repeated through the loop of 5509 to 5518 in FIG.
At 3927 in Figure 9, the value of RCI03 in Figure 1 is 1.
5, that is, when the rhythm pattern to be generated next becomes the final 15 steps, the determination in 3927 becomes YES and the process advances to 5928.

At 5928, the contents of the pattern register PR are changed to 0, and preparations for transition to the main rhythm pattern are made. After this processing, the process advances to 5906 and the final step of the intro rhythm pattern is sounded.

After the above operation, when going through the loop of 5509 to 5518 in Figure 5 and entering the rhythm playback process of 5514 again, the determination in 5901 to 5903 of Figure 9 is N because PR has been set to O.
O, and the sound generation operation according to the main rhythm pattern is started.

As described above, the performer can easily add the intro effect to the rhythm pattern by pressing the intro 5W1053 in FIG. 3 when starting the automatic accompaniment.

The operation when the performer presses stop 5W1055 in FIG. 3 while the rhythm reproduction process 5514 is being repeated in the loop 5509 to 5518 will be described.

In this case, in the various switching processes 3518 in FIG.
The determination of 31003 in FIG. 10 is YES, and S 10
Proceed to step 17. Then, since the determination in S1017 is NO (the value of ACR is 0 in normal mode),
From 51017, the process jumps to steps 5603 and subsequent steps via the route 5101 in 8501 in FIG. The subsequent processing is the same as the processing when the automatic accompaniment ends when the performer presses the ending 5W1057 in FIG.

While the rhythm playback process of 5514 is being repeated by the loop of 5509 to 5518, which is based only on rhythm, the performer plays the keys between C2 and 83 No. of FIG. 2 on the keyboard section 104 of FIG. The operation when one of the accompaniment keys 1042 is pressed will be explained.

In this case, from the keyboard section 104 to the CPU101 in FIG.
Key information Kl shown in FIG. 4 corresponding to the pressed accompaniment key is input.

This input state is detected at 3519 in FIG. 5 while the rhythm sound is being generated, and the determination is YES.

As a result, first, at 5520, the accompaniment flag BF is set to 1, and the mode shifts to accompaniment mode.

Subsequently, in 5521, code judgment is performed.

This is because the key information KI is passed from CPtJlol in FIG. This process determines the root note and chord of .

Next, in 5512, bass sound reproduction processing is performed. This process is a process for accompaniment with a bass note at the pitch of the root note determined by the chord judge unit 108 in FIG. . Therefore, the details are also similar to the details of the rhythm reproduction process shown in FIG.

In this case, the pattern memory section 106 in FIG.
A base pattern having the same structure as the rhythm pattern shown in FIG. 4 is stored.

That is, the base pattern consists of four patterns: a main pattern, a fill-in pattern, an intro pattern, and an ending pattern, and each pattern is composed of 16 step patterns for each rhythm #1 to #6. FIG. 15(C) shows the base pattern of each of the 16 steps in FIG. 14. As shown in the figure, it is possible to specify with a binary number of 0 or 1 whether or not one type of bass tone is to be generated for each step during automatic accompaniment.

In conjunction with the above configuration, the base playback process 5512 in FIG. In synchronization with the reproduction process, a bass sound reproduction process based on the main chord pattern, fill-in bass pattern, ending bass pattern, and intro chord pattern is performed. That is, the operation when playing the bass sound for fill-in SWI 056, ending 5W1057, intro 5W1053, etc. in Fig. 3 is as follows.
This is exactly the same as when playing rhythm sounds.

Note that the bass note (which is a single note) is generated by the accompaniment tone generating section 110 shown in FIG.
is configured to be able to generate multiple musical tones in parallel through time-sharing processing.

Next, at 5513, chord tone reproduction processing is performed. This process is a process of performing chord accompaniment using the chord determined by the chord judge section 108 in FIG. 1, and performs the same process as the rhythm reproduction process in step 5514 above, except for the chord specification. Therefore, as in the case of bass sound reproduction, the details will be explained in the 9th section.
This corresponds to the details of the rhythm playback process shown in the figure.

In this case, the pattern memory section 106 in FIG.
A chord pattern having the same structure as the rhythm pattern shown in FIG. 4 is stored.

FIG. 15(b) shows the code pattern for each of the 16 steps in FIG. 14. As shown in the figure, during automatic accompaniment, you can specify whether or not to generate one type of chord tone (3 to 4 notes are sounded as a chord at the same time) for each step.
Can be specified in decimal numbers.

In addition to the above configuration, since the chord playback process 8513 in FIG. In sync with this code pattern,
Chord sound reproduction processing is performed based on the fill-in chord pattern, ending chord pattern, and intro chord pattern. That is, fill-in 5W1 in FIG.
056, Ending 5W1057, Intro 5W10
53 etc., the operation when playing chord sounds is exactly the same as when playing rhythm sounds.

Note that the reproduction of the chord sound is performed by the accompaniment sound generation section 110 shown in FIG. 1, as described above. In this case, since the chord tones usually consist of 3 to 4 tones, these multiple tones are produced in parallel by time-sharing processing.

In the above bass tone and chord tone reproduction processing, the fifth
Once the key information KI is input from the accompaniment key 1042 (Fig. 2) at 3519 in the figure, the accompaniment flag BF is set to 1 at 5520, so the determination at 5509 is not performed from the next step. The result is YES, and furthermore, the determination at 5510 is No (the ACR value is 0 because it is the normal mode), and a direct code judgment is performed at 5521. Therefore, when playing the bass note and chord note at each step by repeating the loop from 5509 to 5518, if no new key information Kl is input, the same root note pitch and chord will be repeated, and the player will be If the accompaniment key 1042 in FIG. 2 is pressed anew, the pitch and chord of the root note will be changed accordingly.

As described above, when the performer presses the accompaniment key 1042 shown in FIG. By pressing the accompaniment keys 1042 one after another, automatic accompaniment can be performed while changing the pitch of the bass note and the chord type of the chord note at that timing.

(Auto chord mode) Next, detailed operations in auto chord progression mode during automatic accompaniment will be explained. In addition to the operation flowcharts shown in FIGS. 5 to 10, FIGS. 11 and 12 are operation flowcharts related to the autochord progression mode.

ヱC'R(SuL skin) First, FCRroll in Figure 1 shown in Figure 13 above.
In addition to what was explained in the normal mode, things related to the operation in the auto chord progression mode are listed below.

Progression register SR (No. 1311D(d)): A 2-bit register tone length counter OC that indicates whether the current chord progression data is a main chord progression, a fill-in chord progression, an intro chord progression, or an ending chord progression; Counter code counter CC that subtracts and counts the note length of the progression; Counter that counts up the address of chord progression data Chord name disc CC
R, register for storing chord name data CD Scale code register 0TCR; register for storing scale data OTD Below, the operation of the auto chord progression mode will be explained in accordance with the operation flowcharts of FIGS. 5 to 12.

Autochord 'Katsura'-Mode First, when the player turns on the power of the main unit (not shown), in the standby state described in the normal mode, that is, in the repeating operations shown in FIG. 5, 5502 to 5506, the player is the autocode progression SWI O5 in Figure 3.
When 2 is pressed, the determination at 5504 becomes YES, and the process proceeds to auto-chord progression mode processing at 3508. This process is a standby process before starting the autochord progression operation, and its details are shown in FIG. 11.

First, in 51101, the auto chord progression flag ACR indicates the auto chord progression mode (i1 is set).

In the next 31102, auto chord progression 5W1 in Figure 3
The LED above 052 is lit to notify the performer that the auto chord progression mode has been entered.

Subsequently, in step 51103, the accompaniment flag BF is set to a value 1 indicating that accompaniment is in progress. This is because in the autochord progression mode, an accompaniment operation using bass notes and chord notes is always performed.

Furthermore, in 31104, the current rhythm number register RR
Tempo data TD corresponding to the rhythm number specified by is set in the tempo data register TR. Now, the chord progression memory section 107 in FIG.
Tempo data TD is stored as a rhythm header corresponding to each of rhythm numbers #1 to #6 as shown in FIG.

Details of the tempo data TD are shown in FIG. 17. As shown in the figure, the tempo data TD is 5-bit binary data, and can specify a tempo from 0 to 31. By having tempo data TD corresponding to each rhythm number, the performer can perform rhythm 5W105 in FIG.
1, the tempo data TD corresponding to the selected rhythm number is stored in the chord progression memory section 10 of FIG.
7 is read from the rhythm header and set in the tempo data register TR. This is because, for example, rock has a fast tempo and waltz has a relatively slow tempo, so when the rhythm is switched, the optimum tempo is automatically set.

After the processing of S 1101 to 51104 above, 31105
~ By repeating SL109, each switch enters an input waiting state. In other words, in auto chord progression mode, 5
Through the determination processes 1106, 51107 and S 110B, when the performer presses either the star SW 1054, the rhythm 5W 1051 or the intro 5W 1053 in FIG. 3, the auto chord progression mode is started. Each of these will be described later.

Here, 31105 is a process that allows the performer to arbitrarily change the tempo when automatic accompaniment is performed from now on using the tempo up SWI O58 or tempo down SWI 5W1059 in FIG. 3 while waiting in the auto chord progression mode. This is the same as the tempo processing at 8502 in FIG. 5 during normal mode standby (see FIG. 7).

In addition, 51109 is the auto chord progression 5W105 shown in FIG.
If 2 is pressed again, this process exits the auto chord progression mode and returns to the initial state. In other words, when autocode progression 5WI052 is pressed, 511
The determination in 09 is YES, and as a result, the value of the auto code progression flag ACR is returned to 0 in 51115, returning to normal mode, and furthermore, the LED above auto code progression 5W1052 in Figure 3 is turned off in 51116. Ru.

After these operations, the process jumps from 51116 to the process 5603 and subsequent steps via the path 3501 in FIG. The subsequent processing is performed when the performer performs the ending 5W105 in Fig. 3 in the normal mode.
This is the same process as when the automatic accompaniment ends when 7 is pressed.

Auto chord ゛佳'-几While waiting in the auto chord progression mode of Figure 11 51105 to 51109, the performer selects the star in Figure 3) SW105.
When either 4 or Rhythm 5W1051 is pressed, auto chord progression processing begins. In addition, intro 5W105
The case where 3 is pressed will be described later.

First, if Start 5W1054 is pressed, 511
The judgment of 07 is YES, and 5IIIO is shown in Fig. 5 350.
The auto-chord progression mode process in step S511 is then completed.

Furthermore, if any of the rhythm SWIOs 51 is pressed, the determination in step 51108 becomes YES, and the process advances to step S1111. In S 1111, the pressed rhythm SWI 051
The rhythm is switched by setting a value corresponding to the rhythm number in the rhythm number register RR. Also, the following 31
At step 112, similarly to the operation at step 51104, tempo data TD corresponding to the rhythm number set in the rhythm number register RR is set in the tempo record register TR. After these processes, in S1110, the process shown in FIG.
08 autocode progression mode processing is finished, 5511
Proceed to the autocode progression process.

In the above manner, Star) SW1054 or Rhythm 5
When W1051 is pressed, the auto chord progression process of 8511 in FIG. Then, the processes 5509 to 5518 in FIG. 5 are repeated. In this case, the determination of 5509 is 3 in FIG.
Y because the accompaniment flag BF is set to 1 in step 1103.
ES, and the judgment of 5510 is also 5I in Figure 11.
Since the autocode progress flag ACR is set to 1 at IOI, the result is YES. Therefore, in the auto code progression process, 5509 → 5510 → 5511 ~ 551B -3
The loop processing of 509 is repeated. This process will be explained below.

First, in the loop from 5509 to 5518, 5514
The rhythm playback process is exactly the same as the rhythm playback process in the normal mode, and the rhythm sounds are repeatedly generated in a 16-step rhythm pattern.

Furthermore, the bass playback process 5512 and the chord playback process 5513 are similar to the operations performed when the performer presses the accompaniment key 1042 in FIG. Repeat accompaniment with bass notes and chord notes in a chord pattern. That is, for example, the production of rhythm tones of the same rhythm pattern, bass tones of the same bass pattern, and chord tones of the same chord pattern are repeated for each measure. Note that the rhythm pattern, bass pattern, and chord pattern are each independent patterns.

In the above operation, the pitch during the bass playback process and the chord type during the chord playback process were specified by the performer sequentially using the accompaniment keys 1042 in FIG. 2 in the normal mode; mode, these specifications are automatically made over multiple measures,
A major feature of this is that the burden on the performer is significantly reduced.

In order to realize the above operation, chord progression data having a configuration as shown in FIG. 16 is stored in the chord progression memory unit 107 connected to the CPU 101 in FIG. 1. As shown in the figure, the chord progression data includes the main chord progression,
It consists of four types of chord progressions: fill-in chord progression, intro chord progression, and ending chord progression, and each of these chord progressions is composed of 32 steps of chord progression data from 0 to 31 for each rhythm of #1 to #6. Ru.

FIG. 18 shows chord progression data for each of the 32 steps in FIG. 16. The scale data TD specifies scale names such as A, F', etc. using 4-bit binary data. The code name data CD is a minor (
m) - Specify major (M), seventh (7th), etc. Therefore, the chord type for each step is determined by the scale data OTD and the chord name data CD.

The tone length data OD is 4-bit binary data that specifies how long each chord is to be sounded, and its minimum unit is one step of a rhythm pattern, etc., such as a 16th note, an 8th note, etc. etc.

The tone length data OD for each step is subtracted during sound generation, as will be described later, and when it becomes 0, the process moves to the next step. Note that the tone length data OD for appropriate steps up to the 31st step includes 1111 indicating the end, as shown in FIG. 18 (the 31st step is shown in the figure).
'' (“F” in hexadecimal notation), and the code type of any step length can be specified by the steps below except this step.

In this case, the concept of the steps in FIG. 16 or 18 is different from the steps of the rhythm pattern, bass pattern, chord pattern, etc. in FIG. 14 or 15. In other words, one step of the chord progression data is
As described above, this is a plurality of steps such as a rhythm pattern defined by the note length data OD. Hereinafter, in order to distinguish them, steps such as rhythm patterns will be referred to as pattern steps, and steps of chord progression data will be referred to as chord steps. Therefore, while the bass pattern and chord pattern repeat 16 pattern steps for each measure, the chord progression data that defines the bass pitch and chord type at that time is, for example, the chord of the 0th chord step, C1 note length, 8 , the chord of the first chord step is Am, the note length is 8, the chord of the second chord step is F,
The note length is 8, the chord of the third chord step is C7, the note length is 4, the chord of the fourth chord step is C1 note length is 4, etc.
・So, the first 8 bang steps of the first measure are a C chord, the next 8 pattern steps are an Am chord, the first 8 pattern steps of the second measure are an F chord, the next 4 bang steps are a C7 chord, and the last step is a C7 chord. The four pattern steps are a C chord, etc. As the chord is specified, the automatic accompaniment progresses in the auto chord progression mode. Note that the bass pitch is specified, for example, by the root note (first note) of each chord.

Figure 5 3511 to realize the operation specified by the above code
The details are shown in FIG.

First, the determination in S1201 is initially YES because the note length counter OC is initially set to 0 in the initial processing at 8501 in FIG. 5 (3609 in FIG. 6).

Next, in S1202, S1203, and S1204, it is determined whether the value of the progression register SR is 1.2 or 3, that is, whether the chord progression to be automatically accompanied is a fill-in chord progression, an intro chord progression, or an ending chord progression. It is determined whether or not. The performer starts at the start 5 in Figure 3.
When W1054 or Rhythm 5W1051 is pressed,
Since the same disk is initially set to O in the initial processing of 8501 in FIG. 5 (61st D S 606), the main chord progression is started, and the judgments in 51202 to 51204 are all No, and the process proceeds to 31205. .

In S1205, among the main chord progression data of FIG. 16 stored in the chord progression memory section 107 of FIG.
From this chord progression data corresponding to the rhythm number indicated by the rhythm number register RR, the chord counter CC
The code step indicated by the counter value of is read out. Now, since the value of the code counter CC is initialized to 0 in the initial processing at 3501 in FIG.
3609 in FIG. 6), the chord progression data of the 0th chord step is initially read out.

Next, until the final step, the determination in S1206 is NO and the process advances to S1209. Here, first, the tone length data OD (see Fig. 18) of the 0th chord step is set in the tone length counter OC, and then in 51210, the tone length data OTD of the 0th chord step is set in the scale code register 0TCR. In the subsequent step 51211, code name data CD is set in the code name register CCR. This completes the designation of the code type corresponding to the 0th code step.

After the above processing, in S1212 the code counter CC
The O counter value is +1, and in S1213, the counter value of the note length counter OC is -1, and in the next step 31213, the fifth
The autochord progression process in FIG. 5511 ends.

After the above processing, bass reproduction processing is performed in 5512, but the scale at this time is the scale data OT of the 0th chord step set in the scale code register 0TCR.
The scale corresponding to D is specified.

Furthermore, chord reproduction processing is performed in 5513, and the chord type at this time is the scale data OTD of the 0th chord step set in the scale code register 0TCR and the chord name data CD set in the chord name register CCR. specified based on.

In addition to the above bass playback process and chord playback process, the rhythm playback process is performed at 5514 in FIG.
Automatic accompaniment for one pattern step is completed.

Thereafter, the timer clock is input from the timer clock generator 102 in FIG. 1 by repeating 5515, and 351
At 6, Re2O3 in FIG. 1 is counted up. 5517, after the process of S51 (described above)
, 5509, and 5510 become YES, and the process returns to the autocode progression process of S511. in this case,
In 31201 in Figure 12, the tone length counter OC was set last time.
Since the tone length data OD of the 0th chord step is set in , the determination of 51201 is NO until the value becomes 0.
becomes. In this case, in S1213 the tone length counter OC
Only the process of incrementing the counter value by 1 is performed, and in step S1214, the autochord progression process of FIG. 5 3511 is ended. Therefore, the base playback process at 3512 and the base playback process at 5513 in FIG.
In the chord reproduction process, the same scale and chord type as in the previous pattern step are specified.

In the above state, the tone length counter OCO value is subtracted to 0.
(), that is, until the pattern steps for the note length decoding OD of the 0th chord step are repeated (.

Then, note length counter OCO is set at 31201 in Figure 12.
If the value is determined to be 0, after the determinations in S1202 to S1204 become YES, in S1205, the counter of the chord counter CC ( Now, the code counter CC is incremented by 1 by 31212 at the beginning of reading the 0th step, so it is pointing to the value 1. The chord progression data is read out.Then, in S1209 to S1211, the contents of the tone length counter OC1 scale code register 0TCR and the chord name register CCR correspond to the chord progression data of the first chord step. The value of the chord counter CC is incremented by 1 in S1212, the value of the note length counter OC is incremented by -1 in S1213, and the auto chord progression process of 3511 in FIG. 5 is ended in S1214. .

As a result of the above processing, in the bass playback process 3512 and chord playback process 5513 in FIG. 5, the scale and chord type are specified based on the scale data OTD and chord name data CD of the first chord step, and this state is This continues until the pattern steps corresponding to the step's tone length data OD are repeated.

The above operation is repeated while sequentially reading each chord step of the present chord progression data, and when the final chord step of the present chord progression data is read out at 31205 in FIG. 12, the tone length data OD is as described above. 16
Since it is F'' in decimal notation, the determination in S1206 is YES.As a result, the code counter CC is reset to 0 in the next step 31207, and the code counter CC is reset to 0 again in 3120B.
The chord progression data of the chord step is read out, and
Repeat the processing from 1209 onwards.

Therefore, when the present chord progression data is read and the final chord step is reached, this code step is not read out, and the program returns to the 0th chord step again to repeat the same chord progression.

During the above autochord progression process, the performer can select the tempo up 5W1058 or tempo town 5W10 shown in Figure 3.
By operating 59, the value of the tempo data register TR can be changed at 3517 in FIG. This process consists of 5
This is exactly the same as the tempo processing in step 502, and is shown in FIG. 7, which has already been explained.

Next, the operation when the rhythm is switched during the autochord progression process will be described. This processing is similar to the processing when the rhythm is switched during the operation of reproducing only the rhythm sound. However, in the auto chord progression mode, as already explained, the chord progression memory section 10 of FIG.
A rhythm header as shown in Fig. 16 is stored in 7.
When the rhythm is switched, the tempo data is also switched accordingly. Therefore, it is necessary to add this processing.

That is, first, the judgment of 31007 in Fig. 10 is YES.
, in other words, if the rhythm changes at exactly the right timing of the 16-step main rhythm pattern,
In normal mode, after the judgment of 3100B becomes No, the pattern change standby flag PTF is set to O in S1012, but during auto code progression processing, S
1008 is YES, and then S 1009 is NO (the value of pattern register PR is currently 0 for this rhythm pattern), 5IOIO
Proceed to. Here, similar to the operation of 31104 in Fig. 11,
Tempo data T corresponding to the rhythm number set in the rhythm number register RR at 31006 in FIG.
D is set in the tempo data register TR. and,
After this process, as in the normal mode, 510
At step S1012, the pattern change standby flag PTF is set to O, and at step S1013, the various switching processes shown in FIG. 5 are completed.

On the other hand, if the rhythm changes at a timing in the middle of the 16-step main rhythm pattern, in normal mode, 3904-39 in Figure 9
By executing the process of 08-3909-3906, after the main rhythm pattern before the rhythm is changed, when the break comes at a good timing,
The determination of 09 is YES, and furthermore, the determination of 5910 is N.
O, and the pattern change standby flag P is set at 5913.
The rhythm was switched by setting O to TF, but during auto chord progression processing, when the break comes at a good timing, after the judgment at 8909 in Figure 9 becomes YES, 591
A determination of 0 becomes YES. Furthermore, the judgment of 5911 is NO.
(Since the current value of PR is 0), proceed to 5912 and proceed to 31 in FIG. 10, similar to the operation of 31104 in FIG.
At step 006, tempo data TD corresponding to the rhythm number set in the rhythm number register RR is set in the tempo data register TR. And then 5913
The pattern change standby flag PTF is set to 0.

As described above, when the rhythm changes, the contents of the tempo data register TR are changed to a new value, and thereafter, the timing at which the timer clock is input is determined at 8515 in FIG. 5 according to the contents of this register. 551
At step 7, the speed at which Re2O3 in FIG. 1 is counted up is determined.

Note that if the rhythm changes at a timing in the middle of the 16-step main rhythm pattern, in the rhythm playback process of 8514 in FIG. The rhythm changes, and the tree base pattern in the bass playback process of 5512 and the main chord pattern in the chord playback process of 5513 are the same, but the main chord progression data in the auto chord progression process of 3511 does not change the rhythm. Once switched, at 31205 in FIG. 12, the chord progression data is immediately switched to the main chord progression data corresponding to the new rhythm number indicated by the rhythm number register RR.

The operation when the performer presses the fill-in 5W 1056 in FIG. 3 while the automatic accompaniment in the auto chord progression mode is being repeated by the loop 5509 to 5518 in FIG. 5 will be described.

In this case, in the rhythm reproduction process of 3514 in FIG. 5, as in the case of normal mode, 5901-3 in FIG.
By repeating the process 914-3915→5906, when the fill-in 5W 1056 is pressed, the main rhythm pattern immediately changes to the fill-in rhythm pattern.

The same applies to the base pattern and chord pattern in the bass playback process of 5512 and the chord playback process of 5513.

On the other hand, in the auto chord progression process of 5511, the contents of the progression register SR do not change just by pressing the fill-in 5W 1056, and the value 0, that is, indicates the main chord progression. Then, the rhythm playback process in Figure 9 (
In Figure 5 (3514), until the pattern step of the fill-in rhythm pattern reaches the final 15th pattern step and the determination in 8915 becomes YES, the SR content remains O, so the processing status in Figure 12 changes. This chord progression is maintained.

In the rhythm playback process shown in FIG.
At step 6, the pattern register PR is set to 0 and the program returns to the main rhythm pattern. On the other hand, since the progress register SR is set to 1 at 5917, the chord progression data becomes a fill-in chord progression. And 3918.5919
The counter values of the chord counter CC and tone length counter OC are forcibly reset to 0. At this time, the base pattern and the chord pattern have also returned to the main pattern in the bass reproduction process of 5512 and the chord reproduction process of 5513 in FIG.

As a result, the determination at 31201 in FIG. 12 becomes YES, and the determination at S 1202 becomes YES, so that
Proceed to step 15. Then, from among the fill-in chord progression data corresponding to the rhythm number indicated by the rhythm number register RR, a process is performed to read out the chord step indicated by the chord counter CCO count value, that is, the 0th chord step. From now on, S 1216- S 1
209-S 1210-S 1211-S 12
12-31213, and the 0th chord step of the fill-in chord progression data is set.

Below, it operates exactly the same as in the case of this chord progression data,
In the bass playback process 5512 and the chord playback process 5513 in FIG. 5, the scale and chord type are specified by the scale data OTD and chord name data CD of the 0th chord step based on the fill-in chord progression data, and this state is This continues until the pattern steps corresponding to the step's tone length data OD are repeated.

Then, when the value of the tone length counter OC is determined to be O at 31201 in FIG. 12, S 1201-31202 is performed again.
-31215, the fill-in chord progression data of the next first step is read out, and sound generation processing is performed based on this.

The above operation is repeated while sequentially reading out each code step of the fill-in chord progression data.
When the last chord step of the fill-in chord progression data is read out in step 216, the tone length data OD is expressed as ``F'' in hexadecimal as described above.
The determination of S L216 becomes YES. As a result, the progress register SR is returned to 0 at the next step 31217, and the program returns to the main code progress mode.

Then, in step 31218, the chord counter CC is reset to 0, and in step S1205, the chord progression data of the 0th chord step of the main chord progression is read out, and from then on, the main chord progression is used.

An example of the above fill-in operation is shown in FIG. First, the rhythm pattern, bass pattern, and chord pattern are progressing in the main pattern as shown in the figure. Note that each break indicates a pattern step break every 16 steps. In addition, the chord progression data also progresses according to this chord progression. Each division indicates a division by a code step in which 1F# is included as tone length data OD. In this state, T1 in the same figure
When a fill-in occurs at the timing of , the rhythm pattern etc. immediately changes to the fill-in pattern, but the chord progression data still maintains the main chord progression. Then, at the timing of T2, the rhythm pattern etc.
At the end of six pattern steps, the rhythm pattern etc. returns to the main pattern. On the other hand, the chord progression data forcibly changes to a fill-in chord progression at T2, and returns to the main chord progression after proceeding with the fill-in chord progression until the break of the chord step at T3.

In this way, the fill-in of rhythm patterns etc. takes precedence,
This is followed by a fill-in of chord progression data because it produces a musically natural effect. Note that by setting the number of chord steps of the fill-in chord progression data to be shorter than that of the main chord progression data, the fill-in effect can be enhanced. This can be done by inserting the end code "F" as the tone length data OD of an early chord step that does not reach the 31st step in the fill-in chord progression data shown in FIG.

The operation when the performer presses the ending 5W 1057 in FIG. 3 while the automatic accompaniment in the auto chord progression mode is being repeated by the loop 5509 to 5518 in FIG. 5 will be described.

First, at the perfect timing of the main rhythm pattern of 16 chord steps, the ending 5W1057 is played.
When is pressed, in the various switching processes shown in FIG. 5 3518, the process proceeds from S 1002 to S 51016 in FIG.
007→S 1008→S 1009→S 1011, the counter values of note length counter OC and chord counter CC are reset to O, and the value 3 is set in progress register SR. The process then proceeds to S1012, where the pattern change standby flag PTF is set to 0.

Due to the above operation, in the rhythm playback process of 3514 in FIG. 5, since the value of the pattern change standby flag PTF is 0, 5902→
Proceeding from 5920 to 5921, ending rhythm patterns are sequentially read out from pattern step O. Fifth
The same applies to the base pattern and chord pattern in the bass playback process 3512 and the chord playback process 5513 in the figure.

On the other hand, the auto chord progression process of 5511 is as follows:
Proceed to 3-31204 S 1204 (7) Judgment is YE
The result is S, and the process proceeds to S1219. Here, among the ending chord progression data shown in FIG. 16 stored in the chord progression memory section 107 shown in FIG. 1, the counter value of the chord counter CC is calculated from the ending chord progression data corresponding to the rhythm number indicated by the rhythm number register RR. The process of reading out the code step indicated by , that is, the 0th code step is performed. And from now on, S 122
0-31210-31211-31212-31213
Then, the 0th chord step of the ending chord progression data is set.

Below, it operates exactly the same as in the case of this chord progression data,
In the bass playback process 8512 and the chord playback process 5513 in FIG. 5, sound is produced using the scale and chord type based on the ending chord progression data.

Next, if ending 5W1057 in FIG. 3 is pressed at a timing in the middle of the main rhythm pattern of 16 chord steps, in the various switching processes in FIG. is set to the value 3, and furthermore, S 1007-3
The process proceeds from 1008 to S 1009-31010, and the pattern change standby flag PTF is set to 1.

As a result of the above operation, in the rhythm playback process of 3514 in FIG. 5, since the value of the pattern change standby flag PTF is 1, 5902-
3920-3924 to read out the steps of the main rhythm pattern. The same applies to the bass pattern and chord pattern that are applicable to the bass reproduction process 5512 and the chord reproduction process 5513 in FIG.

On the other hand, in the auto chord progression process of 5511, since the value of the progression register SR is still 0, indicating the main chord progression, reading of the above-described main chord progression data is continued. Therefore, in the bass playback process 5512 and the chord playback process 5513 in FIG. 5, the scale and chord type are specified and produced by the scale data OTD and chord name data CD of each chord step based on this chord progression data.

Then, the automatic accompaniment process by the fifth loop of 5509 to 5518 is repeated, and when the value of Re2O3 in FIG. 1 becomes 15 at 3909 in FIG. 9, the determination becomes YES and the process proceeds from 5910 to 3911. . Since the value of the pattern register PR is 3 in 31016 in FIG. 10, the determination in 5911 is YES and 5925
Go to note length counter OC and chord counter CC
The counter value of is reset to O, and the value 3 is set to the progress register SR. The process then proceeds to 5913, where O is set in the pattern change standby flag PTF.

After the above processing, in the rhythm playback processing of FIG. 5 3514, the pattern change standby flag PTF is set to 0.
Therefore, the ending rhythm patterns are sequentially read out in the order of 5902→5920→5921, and the same goes for the base pattern and chord pattern in the bass playback process 5512 and the chord playback process 5513 in FIG. In addition, in the auto chord progression process of 5511, S1201→S1202-S in FIG.
Proceeding to 1203-S 1204, the determination in 31204 becomes YES, proceeding to SL219, reading the ending chord progression data, and in the bass playback process 3512 and the chord playback process 5513 in FIG. 5, the scale based on the ending chord progression data is - Pronunciation is performed depending on the chord type.

Then, the automatic accompaniment process is repeated through the loop from 5509 to 5518 in Figure 5, and when the value of RCI O3 in Figure 1 reaches 15, that is, the rhythm pattern to be sounded next becomes the final 15 steps. Sometimes, the determination at 8922 is No, and at 5923 the final step of the ending rhythm pattern is sounded.

After this operation, the process jumps from 5923 to the process in 51017 via the route shown in FIG. Note that the ending chord progression forcibly ends at the end of the ending rhythm pattern. Since the determination at 31017 in FIG. 10 is Y'ES (the ACR (7) value is 1 in the autocode progression mode), various flags, counters, and registers are initialized at 51018 to 51023. , then the first
The process jumps to the process after step 51105 via the route ``■'' in Figure 1, and the automatic accompaniment ends. After this process, 5110
Repeat steps 5 to 31109 and start 5 in Figure 3.
W1054, intro 5W1053 or rhythm 5W10
51 is pressed. Note that the initial settings of the rhythm number register RR and tempo data register TR are not performed, and when the star) SWI054 or the like is pressed next, automatic accompaniment starts with the previous rhythm number and tempo. Further, in FIG. 11, since the autochord progression mode is on standby, the autochord progression flag ACR and the accompaniment flag BF remain as they were.

An example of the above ending operation is shown in FIG.

First, the rhythm pattern, bass pattern, and chord pattern are progressing in the main pattern as shown in the figure, and
The chord progression data also progresses according to this chord progression. In addition,
The meaning of each break is the same as in FIG. 19. In this state,
When the ending occurs at timing T4 in the same figure, the rhythm pattern, bass pattern, and chord pattern all maintain this pattern until the end of 16 pattern steps, and the chord progression data also maintains this chord progression accordingly. do. Then, when the rhythm pattern etc. reaches the break of the 16 pattern steps at timing T5, the rhythm pattern etc. thereafter shifts to the ending pattern, and the chord progression data is also forced to shift to the ending chord progression at T5. At timing T6, when the rhythm pattern, etc. has finished sounding for 16 pattern steps, the automatic accompaniment process is terminated, and at the same time, the ending chord progression is also forcibly terminated.

In this case, the ending chord progression data does not actually require 32 chord steps as shown in FIG. 16, and it is sufficient to include the ending chord "F" as the tone length data OD of several chord steps. Furthermore, the ending rhythm pattern of 16 pattern steps can be repeated several times to end the rhythm pattern, and in this case, the entire ending chord progression data for 32 chord steps may be stored.

11 of the auto chord progression mode process of FIG. 5 3508
Through the loops 31106 to 51109 in the figure, the fifth
The operation when the performer presses the intro 5 WIO 53 in FIG. 3 to start the autochord progression process 3511 in the figure will be described.

In this case, first, the determination of 31106 in FIG. 11 is YES.
The program then proceeds to step 31113, where the value 2 is set in the pattern register PR and progress register SR, and the intro rhythm pattern mode is entered. After that, the start 5W
In the same way as when pressing 1054 (FIG. 3), the process proceeds to the auto-chord progression process of 3512 in FIG. 5 via 5IIIO.

Hereinafter, the automatic accompaniment in the auto chord progression mode is repeated through the loops 5509 to 5518 in FIG. 5, but in the rhythm playback process in 8514 in FIG. -S
927-S By repeating the process of 906, automatic accompaniment starts with the intro rhythm pattern. Then, the automatic accompaniment with the intro pattern is repeated for 16 pattern steps, and when the value of Re2O3 (Fig. 1) reaches 15, the judgment of 8927 becomes YES, and 892
At step 8, the pattern register PR is set to O, and the main rhythm pattern is entered. The same applies to the base pattern and chord pattern in the bass reproduction process 3512 and chord reproduction process 3513 in FIG. 5.

Next, in the auto chord progression process of 5511, the value of the progression register SR becomes 2 by pressing the intro 5W1053, and since the note length counter OCO value is O at the start as already explained, the 12
After the determination at 31201 in the figure becomes YES and the determination at S 1202 becomes NO, the determination at 51203 becomes YES and the process advances to S 1221. Here, among the intro chord progression data corresponding to the rhythm number indicated by the rhythm number register RR, the chord counter CC
The code step indicated by the counter value, that is, the O-th code step is read out. 51216 after this
-31209→S 1210→S 1211→S 12
12→S1213, and the 0th chord step of the intro chord progression data is set.

Below, it operates exactly the same as in the case of this chord progression data,
In the bass playback process 3512 and the chord playback process 5513 in FIG. 5, the scale and chord type are specified by the scale data OTD and chord name data CD of the Oth chord step based on the intro chord progression data, and this state is This continues until the pattern steps corresponding to the tone length data OD of the stem are repeated.

Then, note length counter OCO is set at 31201 in Figure 12.
If the value is determined to be O, S 1201-31202 again
-S 1203-31221, the intro chord progression data of the next first step is read out, and sound generation processing is performed based on this.

The above operation is repeated while sequentially reading out each code step of the intro chord progression data.
6, when the last chord step of the intro chord progression data is read out, the tone length data OD (see Figure 18)
is F” in hexadecimal representation, so S 1216
The determination becomes YES.

As a result, the progress register SR is returned to 0 at the next step 31217, and the mode shifts to the main code progress mode. And 31
At 218, the code counter CC is reset to 0, and S
At step 1205, the chord progression data of the 0th chord step of the main chord progression is read out, and from then on, the main chord progression is used.

An example of the above intro operation is shown in FIG. As shown in the same figure, at timing T7, intro 5WIO53 (Figure 3)
When starting with , the rhythm pattern, bass pattern, and chord pattern start with the intro pattern, and the chord progression data also starts with the intro chord progression.

In this case, the rhythm pattern, etc. ends the intro pattern in 16 pattern steps and transitions to the main pattern at timing T8, but the chord progression data includes the chord "F" as note length data OD (see Figure 18). The intro pattern is repeated until the chord step where is stored, and the main chord progression starts after timing T9.
The length of an intro such as a rhythm pattern and the length of an intro of chord progression data may be different. Note that, of course, the lengths can also be set to be the same.

The operation when the performer presses stop 5WI055 in FIG. 3 while the automatic accompaniment in the auto chord progression mode is being repeated by the loop 5509 to 5518 in FIG. 5 will be described.

In this case, in the various switching processes 3518 in FIG.
The determination in Figure 10 31003 is YES and 51017
Proceed to. Then, since the determination in S1017 is YES (the value of ACR is 0 in the auto chord progression mode), the process advances to 31018. After this, ending 5W
The automatic accompaniment is ended in the same way as the automatic accompaniment ending process when 1057 (FIG. 3) is pressed.

Next, the operation of another embodiment of the present invention will be explained. Another embodiment described below includes the fill-in SW 1056 and the intro 5W1 shown in FIG. 3 during the autocoat process.
This relates to the operation when 053 is pressed. In this case, the operation flowchart of the rhythm playback process in FIG. 9 is replaced with that of the other embodiment shown in FIG. 22, and the operation flowchart of the autochord progression process of FIG. 12 is replaced with that of the other embodiment shown in FIG. Replaced. Hereinafter, in FIGS. 22 and 23, explanations will be given focusing on the parts with process numbers different from those in FIGS. 9 and 12.

Therefore, while the automatic accompaniment in the auto chord progression mode is being repeated, the performer presses the fill-in 5W105 shown in Figure 3.
The operation of another embodiment when 6 is pressed will be explained with reference to the operation explanatory diagram of FIG. 24.

First, in Fig. 24, the rhythm pattern, bass pattern, and chord pattern are progressing according to the main pattern as shown in the figure, and the chord progression data is also progressing according to the main chord progression, and the timing of TIO in the figure is When a fill-in occurs, in the rhythm playback process of 3514 in FIG. 5, the steps 5901→5914→5915→
Since the processing at 5906 is the same as that in FIG. 9, the rhythm pattern etc. immediately changes to the fill-in pattern, but the chord progression data still maintains the regular chord progression.

This is similar to the operation at the timing Tl in FIG. 19.

Next, when the rhythm pattern etc. reaches the break of 16 pattern steps at the timing of Tll in FIG. 24, as shown in FIG.
In the rhythm playback process of 514, the process of 5915 in FIG.
The processing of -3916 is the same as in Figure 9, and the value of the current progress register SR is O, so the determination of 52201 is YES.
After that, since the processing from 5917 to 5919 is the same as that in FIG. 9, the rhythm pattern etc. returns to the main pattern from then on, and the chord progression data is forcibly changed to the fill-in chord progression at Tll. After that, S 1202-31215 → S 2301- S 12 in Fig. 23
20→S 1210 continues the fill-in chord progression. This process is performed from S1202→S in FIG.
1215→S 1216→S 1209→31210
The process is essentially the same as that of . As described above, the processing at timing T11 is the same as the operation at timing T2 in FIG. 19.

However, when the fill-in chord progression data reaches the code step break at timing T12 in FIG. 24, in the embodiment shown in FIG.
Since the value of S230 was returned to 0, the program returned to the main code progression, but in the other embodiment shown in FIG.
At step 3, the readout of the fill-in chord progression data from the O-th code step is repeated again. Therefore, unlike the timing of T3 in the 19th time, T12 in FIG.
Then, the fill-in chord progression continues as is. This state is repeated until the player presses fill-in 5W1056 (FIG. 3) again.

Then, when the fill-in 5 WIO 56 is pressed again at T13 in FIG. 24, the rhythm pattern etc. immediately shifts to the fill-in pattern as before, and when the 16 pattern steps break at TI4 in FIG.
The process returns to the main pattern by processing steps 5915→5916 in FIG.

On the other hand, the chord progression data is
Even if the fill-in 5W 1056 is pressed at step 13, the value of the progress register SR does not change, so the fill-in code continues to progress. Then, when the rhythm pattern is divided into 16 pattern steps at 714 in Figure 24 and returns to the main pattern, 5915 → 5916 → 522 in Figure 22
01→S 2202→52203-32204, and the value of the progress register SR is returned to O. Therefore, at this point, the chord progression switch returns from the fill-in chord progression to the main chord progression for the first time.

As shown in FIG. 24, fill-in 5W1056
When (FIG. 3) is pressed once (TIO), the rhythm pattern etc. will first go into the fill-in state, and then, at the timing when the rhythm pattern returns to the main pattern (Tll), the chord progression will go into the fill-in state.

The fill-in state of the chord progression is maintained, and at the timing when fill-in 5W1056 is pressed again (
T13), the rhythm pattern etc. enters the fill-in state again, and then at the timing when the rhythm pattern returns to the main pattern (T14), the chord progression data returns to the main chord progression.

The above operation allows the performer to freely control the duration of the fill-in chord progression. Note that for rhythm patterns, etc., it is better to return to the original pattern after 16 steps to obtain a better musical effect.

Next, when the performer starts the autochord progression process 8511 in FIG. 5 through the loop 51106 to 51109 in FIG. 11 of the autochord progression mode process 3508 in FIG. The operation of another embodiment when started by pressing 5W1053 will be explained with reference to FIG.

In this case, first, in FIG. 25, when the intro 5W1053 is pressed at timing T15, the value 2 is first set in the pattern register PR and progress register SR at 5l113 in FIG. 11, as in the case of the previous embodiment. to enter intro rhythm pattern mode.

Hereinafter, the loop from 5509 to 5518 in FIG. 5 is repeated, but first, in the rhythm playback process at 5514,
S 902- S 926- S 927 in Fig. 22→
Since the process at 5906 is the same as that in FIG. 9, automatic accompaniment starts with the intro rhythm pattern. In other words, the process at timing T15 in FIG.
The operation is similar to the operation at timing 7. Then, the automatic accompaniment with the intro pattern is repeated for 16 pattern steps, and at timing 716 in FIG.
(Figure 1) becomes 15, Figure 22 5927 → 5
Since the processing at 928 is the same as that in FIG. 9, the pattern register PR is set to 0 at 3928, and the routine shifts to the main rhythm pattern. This is similar to the operation at timing T8 in FIG. 19.

Next, in the autochord progression process of 3511 in FIG.
Since the processing of 216-51209 is the same as that in FIG. 12, automatic accompaniment starts with the intro chord progression. Therefore, regarding the auto chord progression process, T15 in FIG.
The processing at the timing T7 in FIG. 21 is the same as the processing at the timing T7 in FIG.

However, when the intro chord progression data reaches the chord step break at timing 717 in FIG. 25, the determination in 51216 is Y in the embodiment shown in FIG.
After becoming ES, the value of the progress register SR was returned to 0 in S1217, so the main code progression was started, but the second
In the other embodiment shown in FIG. 3, after the determination in 51216 becomes YES, the value of the progress register SR does not change, and S2304
The reading of the intro chord progression data from the Oth chord step is repeated again. Therefore, T in Figure 21
Unlike the case at timing 9, the intro chord progression continues as it is at T17 in FIG. In this state, the performer must once again fill in the fill-in 5W1056 (Fig. 3).
Repeats until you press .

Then, when the fill-in 5WI056 is pressed again at 718 in FIG. 25, the rhythm pattern etc. immediately shifts to the fill-in pattern as before, and when the 16 pattern steps break at T19 in FIG.
The process returns to the main pattern through the processes 5915-3916 in FIG.

On the other hand, the chord progression data is T in Figure 25.
Even if the fill-in 5W 1056 is pressed at step 18, the value of the progress register SR does not change, so the intro chord progression continues. And the rhythm pattern is 7 in Figure 25.
19 marks the end of 16 pattern steps and returns to the main pattern.
The process progresses from 1 to S 2202 to S 2204, and the value of the progress register SR is returned to 0.

Therefore, for the first time, the chord progression data returns from the intro chord progression to the main chord progression.

Above, as shown in Fig. 25, Intro 5WI053 (
When the program starts at (T15) in FIG. 3, both the rhythm pattern and the chord progression data enter the intro state, and then at the timing T16, the rhythm pattern returns to the main pattern. On the other hand, the intro state of the chord progression is maintained, and at the timing when fill-in 5W1056 is pressed again (
TlB), the rhythm pattern etc. enters the fill-in state again, and then at the timing when the rhythm pattern returns to the main pattern (T19), the chord progression data returns to the main chord progression.

The above operation allows the performer to freely control the duration of the intro chord progression.

〔Effect of the invention〕

According to the present invention, difficult bass chord progressions are all performed automatically, and the performer can easily switch from a normal chord progression to a special chord progression with a simple switch operation, making it easy to create a variety of chord progressions. It becomes possible to specify.

In particular, in this case, the chord progression data is also switched in conjunction with the rhythm pattern switching operation.
Since the accompaniment can be controlled to be musically effective, even beginners can easily enjoy advanced automatic accompaniment.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention; FIG. 2 is an external configuration diagram of a keyboard section; FIG. 3 is an external configuration diagram of a switch section; FIG. 4 is a data configuration diagram of key information; 5 is a main operation flowchart, FIG. 6 is an operation flowchart for initial processing, FIG. 7 is an operation flowchart for tempo processing, FIG. 8 is an operation flowchart for initial rhythm switching processing, and FIG. 10 is an operational flowchart of rhythm playback processing, FIG. 10 is an operational flowchart of various switching processes, FIG. 11 is an operational flowchart of autochord progression mode processing, and FIG. 12 is an operational flowchart of autochord progression processing. Flowchart diagrams, Figures 13(a) to (1) are configuration diagrams of the flag counter register group (FCR), Figure 14 is a configuration diagram of the pattern memory section, and Figure 15(a).
) to (C) are data configuration diagrams of each pattern, Figure 16 is a configuration diagram of the chord progression memory section, Figure 17 is a data configuration diagram of tempo data, and Figure 18 is a diagram of each chord progression data. Data configuration diagram, FIG. 19 is an explanatory diagram of fill-in operation, FIG. 20 is an explanatory diagram of ending operation, FIG. 21 is an explanatory diagram of intro operation, and FIG. 22 is an operation flowchart of rhythm playback processing of another embodiment. 23 is an operational flowchart of autochord progression processing in another embodiment. FIG. 24 is an explanatory diagram of fill-in operation in another embodiment. FIG. 25 is an explanatory diagram of intro operation in another embodiment. It is. 101... Central control unit (CPU), 102... Timer clock, 103... Rhythm counter (RC), 104... Keyboard section, 105... Switch section, 106... Pattern memory section, 107...Chord progression memory section, 108...Chord judge section, 110...Accompaniment sound generation section, 111...Rhythm sound generation section 111. 112...Sound system. Patent applicant: Casio Computer Co., Ltd.

Claims (1)

[Claims] 1) An automatic accompaniment device that generates rhythm tones based on a predetermined rhythm pattern and also generates bass tones and chord tones based on predetermined bass patterns and chord patterns to perform automatic accompaniment, rhythm pattern storage means for storing a normal rhythm pattern and at least one type of special rhythm pattern; selection means for selecting each of the special rhythm patterns; and during automatic accompaniment, the normal rhythm patterns are sequentially selected from the pattern storage means during normal times. Rhythm pattern control means for sequentially reading out the corresponding special rhythm patterns when a selection operation is performed by the reading and selecting means, and controlling the sounding timing of the rhythm sound based on the read rhythm pattern; and a normal code. chord progression storage means for storing progression data and at least one type of special chord progression data; and a chord progression storage means for storing progression data and at least one type of special chord progression data; data or special chord progression data is sequentially read out, and based on the read chord progression data, the type of chord sound to be sounded by the chord pattern and the pitch of the bass sound to be sounded by the bass pattern are sequentially specified. An automatic accompaniment device comprising: automatic chord progression control means for performing chord progression; 2) the normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is a fill-in rhythm pattern, the normal chord progression data is main chord progression data, and the special chord progression data is fill-in chord progression data; The selection means is a fill-in switch, and the rhythm pattern control means changes to the readout operation of the fill-in rhythm pattern when the fill-in switch is pressed during the readout operation of the main rhythm pattern, and the rhythm pattern control means changes to the readout operation of the fill-in rhythm pattern and performs a readout operation of the predetermined length. After reading the fill-in rhythm pattern, the automatic chord progression control means returns to the reading operation of the main rhythm pattern.
After the read operation of the fill-in rhythm pattern is completed by the rhythm pattern control means during the read operation of the main chord progression data, the operation is changed to the read operation of the fill-in chord progression data, and the fill-in chord progression data of a predetermined length is read. 2. The automatic accompaniment device according to claim 1, wherein when reading is finished, the automatic accompaniment device returns to the reading operation of the main chord progression data. 3) the normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is an ending rhythm pattern, the normal chord progression data is main chord progression data, and the special chord progression data is ending chord progression data, The selection means is an ending switch, and when the ending switch is pressed during the reading operation of the main rhythm pattern during automatic accompaniment, the rhythm pattern control means selects the rhythm pattern at the timing when the main rhythm pattern has been read to the end. The automatic chord progression control means changes the ending rhythm pattern reading operation, and the automatic chord progression control means starts the ending rhythm pattern reading operation at the same time as the rhythm pattern control means starts the ending rhythm pattern reading operation during the reading operation of the main chord progression data. The automatic accompaniment device according to claim 1, wherein the automatic accompaniment device changes to a data reading operation. 4) the normal rhythm pattern is a main rhythm pattern, the special rhythm pattern is an intro rhythm pattern, the normal chord progression data is main chord progression data, and the special chord progression data is intro chord progression data; The selection means is an intro switch, and the rhythm pattern control means starts reading out the intro rhythm pattern to start automatic accompaniment when the intro switch is pressed at the start of automatic accompaniment, and starts automatic accompaniment for a predetermined length. After reading the intro rhythm pattern, the automatic chord progression control means starts the read out operation of the intro rhythm pattern by the rhythm pattern control means at the start of automatic accompaniment. At the same time, change the operation to read the intro chord progression data, and after reading the intro chord progression data of a predetermined length,
The automatic accompaniment device according to claim 1, wherein the automatic accompaniment device moves to a read operation of the main chord progression data.