JPH04303893A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To realize timbre as if plural key-on operations are performed by one key-on operation. CONSTITUTION:A keyboard 2 as a means to designate the start of sounding and tone height, a ROM 18 and a RAM 20 as storage means storing performance pattern data, a CPU 14 as a readout means to start the readout of the performance pattern data from the above storage means by a start instruction of sounding, and the CPU 14 as a means to shift the note of a performance pattern read out corresponding to designated tone height are provided, and the note shift of the pattern is performed corresponding to the tone height.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument in which a single key-on produces a tone based on a plurality of key-on sounds.

0002

2. Description of the Related Art Conventionally, electronic musical instruments have been known that sample a plurality of tones formed by key-on and reproduce them in the same way as normal tones, that is, phrase sampling. In addition, there are devices that assign one sequence pattern to one key and can play a melody by turning on one key.

0003

[Problems to be Solved by the Invention] Phrase sampling has the disadvantage that when the pitch changes, the playback speed also changes, and a very large amount of data is required. In addition, when one sequence pattern is assigned to one key, a melody can be played by turning on one key, but the pitch cannot be changed, so it cannot be handled in the same way as a normal tone.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electronic musical instrument that can easily produce tones based on multiple key-ons with one key-on.

[0005]

[Means for Solving the Problems] The electronic musical instrument of the present invention includes:
A means for starting sound generation and specifying pitch (keyboard 2), and a storage means for storing performance pattern data (ROM 18, R
AM20) and reading means (C
PU 14), and means (CPU 14) for shifting the notes of the read performance pattern according to the specified pitch.
It is characterized by having the following.

[0006]

[Operation] When the instruction to start sound generation and the specification of pitch are given, reading of the performance pattern data from the storage means is started in response to the instruction to start sound generation, and the notes of the performance pattern are shifted according to the specified pitch. As a result, by specifying a normal single note, a plurality of pitch changes equivalent to a plurality of key-ons can be obtained, and a performance pattern in which notes are shifted according to the pitch specification can be obtained.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of an electronic musical instrument according to the present invention. The keyboard 2 is a means for specifying the start, end, and pitch of the musical tones to be generated, and is provided with a plurality of keys. A key press detection circuit 4 connected to the keyboard 2 detects the press of a key on the keyboard 2, and generates a key-on signal KON and a key-off signal KOFF along with a key code in response to the press.

The panel switch 6 is a plurality of switches installed on the operation panel surface of the main body of the musical instrument, and includes a tone selection switch and the like. A switch (SW) detection circuit 8 connected to this panel switch 6
It detects whether the switch is on or off, and when it detects the on or off state, it generates a switch detection signal.

The display circuit 10 includes a display such as an LCD display installed on the panel surface of the main body of the musical instrument, and displays various data such as performance data.

The key press detection circuit 4, switch detection circuit 8, and display circuit 10 are connected to a central processing unit (CPU) 14 via a bus 12. The CPU 14 reads performance pattern data stored in the storage means from the timer 16 based on clock pulses in response to an instruction to start sounding the keyboard 2, and also reads out various other data and performs arithmetic processing. This means shifts the notes of the performance pattern read from the storage means based on the pitch. The ROM 18 is a storage means that stores various fixed data and control programs such as tone data, performance pattern data, and shift control programs.

The RAM 20 is a storage means that can be written and read at any time for storing various data such as a key code KC, a key-on signal KON, a key-off signal KOFF, performance pattern data, and data being processed by the CPU 14. Listing the registers installed in this RAM 20, TC1 to TC16 are registers that store the tempo clock, NOTE1 to NOTE16 are registers that store note numbers (key-on), KON1 to KON16 are registers that store key-on flags, and OFNOTE is a register that stores key-off. There are registers etc. that store numbers.

The tone generator circuit 22 is a means for generating a musical tone signal to be generated based on the musical tone data obtained through the arithmetic processing of the CPU 14, and is equipped with a waveform memory, etc., and forms a musical tone signal waveform to be generated. do. sound system (
SS) 24 is means for producing sound from the musical tone signal from the sound source circuit 22, and is comprised of an amplifier for amplifying the musical tone signal, a speaker for converting the amplified output into sound, and the like.

Next, FIG. 2 shows the format of performance data, ie, tone pattern data, stored in the RAM 20. That is, the pattern data includes header, timing,
It consists of event, timing, event...end. The timing is from the beginning of the pattern. "Header" includes standard notes, tempo, tone...
It consists of... The "reference note" is a reference value for a shift that converts a note according to a pressed key. "Tone" stores data related to the timbre, such as waveform instruction data for a piano or the like. Further, an "event" is composed of note-on, note number, velocity, and gate time. In addition, the "event" may include normal sequence data such as pitch bend, aftertouch, modulation, etc. In addition, “Gate Time” is
This is the time from note-on to auto-off.

With this configuration, for example, the performance pattern shown in FIG. 3A is set for the key C3, and the reference note C3 is set. Then, when key C3 is pressed, this key press gives an instruction to start sounding,
This performance pattern data is read out. As a result, the performance pattern shown in FIG. 3A is played with key C3. Next, when the key D3 is pressed, the performance pattern shown in FIG. 3(A) is played with note shifts as shown in FIG. 3(B). That is, by specifying a pitch, a performance pattern is played with a shift value corresponding to the pitch, that is, a single key-on can produce a tone equivalent to multiple key-ons. The formation of a timbre in which there are multiple key-ons for one key-on will be described with reference to the flowcharts shown in FIGS. 4 to 7.

That is, FIG. 4 shows the main routine. In this main routine, initialization is performed in step S1. In this initialization, the device is set to a state where it can produce sound based on the power switch being turned on. Next, in step S2, the key pressing process shown in FIG. 6 is performed, and then in step S
In Step 3, the pattern reading process shown in FIG.
By returning to step 2, the performance is performed.

Next, FIG. 5 shows timer interrupt processing. That is, in step S5, each of the registers TC1 to TC16 is incremented by "1" and the process returns to the main routine of FIG.

Next, FIG. 6 shows key press processing in the main routine shown in FIG. In this key press process, it is determined in step S21 whether or not a key-on event has occurred;
If there is a key-on event, proceed to step S22; if there is no key-on event, proceed to step S25.
to move to. In step S22, channel assignment processing is performed, and the assigned channel among channels 1 to 16 is designated as the i channel. Next, in step S23, the note number is set in the register NOTEi (i=1 to 16), "1" is set in the register KONi, that is, a flag is set, and "0" is set in the register TCi. Here, the note number set in the register NOTEi is the note number of the key that was turned on. Next, in step S24, the iCH pattern read address is set at the beginning of the pattern.

In step S25, it is determined whether or not there is a key-off event. If there is a key-off event, the process moves to step S26, and if there is no key-off event, the process returns to the main routine. In step S26, the note number of the key whose key has been turned off is stored in the register OFNOTE. Next, in step S27, a channel CH to which the register OFNOTE is assigned is searched, and the process moves to step S28. In step S28, "0" is put into the register KON of the corresponding channel, and the process returns to the main routine.

Next, FIG. 7 shows pattern reading processing in the main routine of FIG. In this pattern reading process, "1" is stored in register j in step S31, and the process moves to step S32. In step S32, it is determined whether the register KONj=1, and if KONj=1, the process moves to step S33, and if KONj≠1, the process moves to step S41. Step S3
In step 3, performance pattern data is read from the RAM 20 based on the register TCj. In step S34, it is determined whether the read pattern data is note data or not.
In the case of note data, the process moves to step S35.

In step S35, the note number of the read data is shifted according to the value of the register NOTEj. That is, the difference between the reference note and NOTEj is added to the read note number. Next, in step S36, note-on, note number (after shifting), velocity, and gate time are output to the tone generator circuit 22.

If it is determined in step S34 that the data is not note data, the process moves to step S37, and the process proceeds to step S3.
In step S7, it is determined whether or not it is end data, and if it is end data, the process moves to step S38. Step S38
Then, set the read address at the beginning and proceed to step S39.
to move to. In step S39, “
0'' is stored, and the process moves to step S41. If it is determined in step S37 that the data is not end data, the process moves to step S40, and after the data is output, the process moves to step S41.

[0022] In step S41, the value of register j is
1'', and the process moves to step S42. In step S42, it is determined whether the value of register j is 17. If j≠17, the process returns to step S32, and the process is repeated until j=17. When j=17, the pattern reading process is ended and the process returns to step S4 of the main routine.

[0023] Based on such processing, a timbre having a plurality of key-ons at one key-on, that is, a performance pattern consisting of a plurality of tones is played. In this type of processing, the tone data has a sequence pattern, and when the key is turned on, the sequence data is read out, and the note is shifted according to the pitch of the key that is turned on, so it is treated in the same way as a normal tone, and the pitch is This has the advantage that the playback speed of musical tones does not change due to the change in speed, and the amount of data is not so large, making it easy to handle.

Depending on the pattern, a delay-like effect can also be obtained; for example, by arranging the same notes at equal time intervals so that the sound gradually decreases, an equivalent delay effect can be obtained.

Modifications of the electronic musical instrument of the present invention are listed below. a. The pattern set for the entire key range may not be the same pattern, for example, it may be divided into multiple ranges and one pattern is assigned to each range (for example, for each octave), or it may be set to one pattern for each range (for example, for each octave). It may also be something that only has a pattern. b. In the embodiment, an example of multitone pronunciation, that is, a pattern is played at different pitches for the number of keys pressed, has been shown, but single note pronunciation may also be used. In that case, by holding down one key and pressing the next key, only note shifting may be performed without reading out anew from the beginning. That is, when the first key is turned off and the next key is turned on, note shifting is performed from the beginning of the pattern. c. I made it a loop, that is, when it reaches the end of the pattern, it does not end there, but returns to the beginning of the pattern and continues.
It is not limited to starting from the beginning of the pattern, but may start from the middle. Also, there may be no loop. d. The tone color may be changed during the pattern, or the pattern may be composed of a plurality of tone colors. e. The pattern may be cut out from a pattern that has been created as a song in advance. f. The volume and tone may be controlled in real time by detecting key touches. g. The sound may be generated not only by keyboard input but also by external input such as a sequencer or MIDI.

[0026]

As explained above, according to the present invention, the performance pattern data stored in the storage means corresponding to the pitch is read out in accordance with the instruction to start sounding and the pitch specification, and the read performance pattern is read out. Since the notes of the key are shifted according to the specified pitch, a single key operation can produce the same tone as multiple key ons. It is possible to provide a wide variety of performances through operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an electronic musical instrument of the present invention.

FIG. 2 is a diagram showing a format of tone data in the electronic musical instrument shown in FIG. 1;

FIG. 3 is a diagram showing shifts in performance patterns in the electronic musical instrument shown in FIG. 1;

FIG. 4 is a flowchart showing the operation of the electronic musical instrument shown in FIG. 1;

FIG. 5 is a flowchart showing the operation of the electronic musical instrument shown in FIG. 1;

FIG. 6 is a flowchart showing the operation of the electronic musical instrument shown in FIG. 1;

7 is a flowchart showing the operation of the electronic musical instrument shown in FIG. 1. FIG.

[Explanation of symbols]

2...Keyboard (means for starting sound generation and specifying pitch), 1
4... CPU (pattern data reading means and note shift means), 18... ROM (storage means), 20
...RAM (storage means).

Claims (1)

[Claims] 1. Means for specifying the start of sound generation and pitch; storage means for storing performance pattern data; reading means for starting reading out the performance pattern data from the storage means in response to an instruction to start sound production; 1. An electronic musical instrument comprising: means for shifting notes of the read performance pattern according to pitches read.