JPH0310559Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to an automatic accompaniment device for electronic musical instruments that automatically generates accompaniment sounds such as chords, bass sounds, rhythm sounds, etc.・
By selectively using accompaniment information written in a ROM (read-only memory) and accompaniment pattern information pre-stored in a ROM (read-only memory), a wide variety of accompaniments can be created.

[Prior art]

Conventionally, electronic musical instruments have been designed to record performance data on a magnetic tape attached to a score sheet, read this performance data and store it in RAM within the instrument body, and read the performance data from this RAM for automatic performance. is known. In addition, in such an electronic musical instrument, accompaniment pattern selection data is included in the recorded performance data, and based on the accompaniment pattern selection data read from the RAM, it is stored in the ROM in the instrument body in advance. Select one of multiple accompaniment patterns, and play chords, bass notes, etc. according to the selected accompaniment pattern.
It has also been proposed to generate accompaniment sounds such as rhythm sounds.

However, according to the above-mentioned conventional technology, since there is a limit to the capacity of the memory for storing accompaniment patterns, the types of patterns are naturally limited. For example, when considering the rhythm of a waltz, there are many possible patterns, and it is impossible to store them all in ROM. For this reason,
The ROM stores accompaniment patterns that can be commonly used for many songs for each rhythm type, which tends to make the accompaniment monotonous.

[Purpose of invention]

The purpose of this invention is to provide a new automatic accompaniment device that makes it possible to generate a variety of accompaniment sounds.

[Structure and action of the device]

The automatic accompaniment device for an electronic musical instrument according to this invention includes (a) a first storage means into which accompaniment information is to be written from the outside, and (b) detecting and detecting writing of accompaniment information to the first storage means. (c) a second storage means storing a plurality of accompaniment patterns; and (d) a pattern selection means for selecting any one of the plurality of accompaniment patterns. and (e) detecting that one of the accompaniment patterns has been selected by the pattern selection means and transmitting the first detection output, and detecting that the selection of the accompaniment pattern has been canceled and transmitting the second detection output. (f) a second detection means for sending out a detection output; (g) storage selection means for selecting the second storage means according to a first detection output from the second detection means; is selected, an accompaniment sound signal is generated based on the accompaniment information of the first storage means, and when the second storage means is selected by the storage selection means, an accompaniment sound signal is generated based on the accompaniment information of the plurality of accompaniment patterns. and accompaniment sound generation means for generating an accompaniment sound signal based on the pattern selected by the pattern selection means.

According to the configuration of this invention, when accompaniment information is written into the first storage means from the outside, the first storage means is automatically selected according to the detection output of the first detection means, and then the pattern is selected. When an arbitrary accompaniment pattern is selected by the means, the first accompaniment pattern from the second detection means is selected.
The second storage means is automatically selected according to the detection output from the second detection means, and when the accompaniment pattern is further deselected, the first storage means is automatically selected according to the second detection output from the second detection means. selected.

Therefore, the accompaniment based on the accompaniment information of the first storage means may be shifted to the accompaniment based on the accompaniment pattern of the second storage means, or the accompaniment may be shifted from the accompaniment based on the accompaniment pattern to the accompaniment based on the accompaniment information. You can enjoy a wide variety of automatic accompaniment. Also,
The first storage means is automatically selected in conjunction with the writing of accompaniment information, and the second storage means and the first storage means are automatically selected in conjunction with the selection and deselection of accompaniment patterns, respectively.
Since the storage means of the first and second
There is no need to provide a dedicated operator for selecting or switching the storage means, which simplifies the configuration and operation.

〔Example〕

The figure shows an electronic musical instrument according to an embodiment of this invention.

The keyboard 10 has, for example, an upper key range (UK) and a lower key range (LK), and a large number of keys belonging to these key ranges are sequentially and repeatedly scanned by the key press detection circuit 12. It's becoming like that.

The key press detection circuit 12 generates key press data KD indicating the pressed key based on key scanning.
Of this key press data KD, UK key press data UKD is supplied to the selector 14 as input B, and LK key press data LKD is supplied to the chord/base data forming circuit 1.
6.

The ABC (auto bass chord) function switch (SW) circuit 18 includes a function switch for selecting ABC modes such as finger guard mode and single finger mode, and responds to the switch operation. The selected mode selection signal is supplied to the chord/base data forming circuit 16.

The rhythm select switch (SW) circuit 20 is
It includes a rhythm selection switch for selecting any one of various rhythms such as march, waltz, swing, rumba, etc., and a rhythm selection signal corresponding to the switch operation is supplied to the pattern memory 22. There is.

The pattern memory 22 is composed of a ROM that stores a large number of rhythm patterns corresponding to various rhythms as exemplified above, and its reading operation is performed based on the clock signal φ when the performance start switch ST is turned on. Read control circuit 24
It is designed to be controlled according to an address signal generated from the address signal. That is, pattern memory 2
2, a specific rhythm pattern selected by the above-mentioned rhythm select switch is read out, and along with this rhythm pattern reading, a rhythm pattern signal RMB and a sound generation timing control signal TM are sent out. Here, the rhythm pattern signal RMB includes a signal for driving various rhythm sound sources such as a bass drum, snare drum, cymbals, and maracas according to the rhythm pattern, and is supplied to the selector 26 as input B. . Furthermore, the sound generation timing control signal TM includes a signal for controlling the sound generation timing of chords and bass notes according to the rhythm pattern, and is supplied to the chord/base data forming circuit 16.

The chord/base data forming circuit 16 corresponds to the one key pressed by LK when the single finger mode is selected (or the lowest note key (or highest note key) if multiple keys are pressed at the same time). Chord pitch data indicating the pitch of the chord to be sounded and bass pitch data indicating the pitch of the bass note to be produced are created based on the LK key press data LKD, and when the finger chord mode is selected, Forms chord pitch data indicating the pitch of the chord to be sounded and base pitch data indicating the pitch of the bass note to be sounded based on the LK key press data LKD corresponding to multiple keys pressed on the LK. The formed chord/bass pitch data is sent out in response to the sound generation timing control signal TM. The chord/bass pitch data CBB sent in this way is sent to the selector 28.
is supplied as input B to

The musical score sheet 30 has a predetermined musical piece written on its surface, and a magnetic tape _30a is attached near the lower end thereof. This magnetic tape _30a
The performance data for automatically playing the above-mentioned predetermined music is recorded, and this performance data includes:
In addition to melody performance data, accompaniment data such as chord performance data, bass performance data, and rhythm performance data is included. Note that this accompaniment data has accompaniment content that is well suited to the melody of the predetermined music piece.

When the lower part of the musical score sheet 30 is inserted into the receiving opening of the reading device 32, performance data is read from the magnetic tape _30a . The read performance data is then supplied to the RAM write circuit 34 in serial format.

The RAM write circuit 34 converts data in serial format into data in parallel format, and also writes/writes data in parallel format.
The read control circuit 36 is controlled to write performance data into a performance data memory 38 consisting of a RAM. In this case, the write/read control circuit 36 puts the performance data memory 38 into a write mode using the mode control signal MC, and supplies a write address signal to the performance data memory 38 based on the clock signal φ.

When the performance start switch ST is turned on, the write/read control circuit 36 performs a control operation to read out previously written performance data. That is,
In this read control operation, the performance data memory 38 is put into a read mode by the mode control signal MC, and a read address signal is supplied to the memory 38 to control sequential data read. In this case, the melody performance data includes pitch data and note length data for each note to be sounded, and each time the write/read control circuit 36 reads out the pitch/note length data, the note length data is LG and clock signal φ
The timing for reading the next pitch/note length data is determined based on this. Such readout control operation is the same for chord performance data and bass performance data. The rhythm performance data includes sound generation timing data and rhythm sound source designation data for each percussion instrument sound to be generated, and the write/read control circuit 36 generates the sound generation timing data TD at regular intervals based on the clock signal φ. It is read out to check whether there is a percussion instrument sound to be generated at that timing, and if there is, the corresponding rhythm sound source designation data is read out.

Through the read operation described above, melody pitch data ML, chord/bass pitch data CBA, and rhythm sound source specification data are retrieved from the performance data memory 38.
RMA is sent out in chronological order, melody pitch data ML is input to the selector 14 as input A, chord/bass pitch data CBA is input to the selector 28 as input A, and rhythm sound source specification data RMA is input to the selector 26 as input A. Each is supplied.

The selector 14 selectively sends out melody pitch data ML if the selection control input SA is "1", and sends out UK key press data UKD if the selection control input SA is "0".
(melody pitch data by UK performance) is selectively transmitted, and the selected output is supplied to the melody sound source circuit 40.

If the selection control input SA is “1”, the selector 28 selectively sends out chord/bass pitch data CBA;
If the selection control input SA is "0", the chord/bass pitch data CBB is selectively sent out, and the selected output is supplied to the chord/bass sound source circuit 42.

If the selection control input SA is “1”, the selector 26 selectively sends out the rhythm sound source specification data RMA;
If the selection control input SA is "0", the rhythm pattern signal RMB is selectively transmitted, and the selected output is supplied to the rhythm sound source circuit 44.

The melody sound source circuit 40 generates a melody sound signal based on the selected output of the selector 14, and this melody sound signal is supplied to a speaker 48 via an output amplifier 46 and converted into sound.

The chord/bass sound source circuit 42 generates a chord signal and a bass tone signal based on the selected output of the selector 28, and these chord signals and bass tone signals are also supplied to the speaker 48 via the output amplifier 46 to produce an acoustic sound. is converted to

The rhythm sound source circuit 44 includes various rhythm sound sources as exemplified above, and generates rhythm sound signals by driving these rhythm sound sources in accordance with the selection output of the selector 26. This rhythm sound signal is also output from the output amplifier 4.
The signal is supplied to the speaker 48 via the speaker 6 and converted into sound.

R-S flip-flops 50, 52 and 54
are provided to control the selection operations of the selectors 14, 28, and 26, respectively, and are all designed to be initially reset when the power is turned on. Therefore, when the power is turned on, the selector 14,
28 and 26 are flip-flops 50,
52 and the output Q="0", the input B is selected. Therefore, when a melody is played on the UK keyboard 10, a melody sound is produced from the speaker 48. In this case, select either single finger mode or finger chord mode using the aforementioned function switch, select a specific rhythm (e.g. waltz) using the aforementioned rhythm select switch, and press the performance start switch ST. When you specify a chord with LK after turning it on, the pattern memory 2 will be output from the speaker 48.
Rhythm tones are played according to a specific rhythm pattern in 2, and chords and bass sounds are played in an abbreviated form according to the specific rhythm pattern.

By the way, before starting such a manual performance, if the musical score sheet 30 is set in the reading device 32 and the above-mentioned performance data reading operation is started, the flip-flop 50 is activated in response to the reading start signal RS from the reading device 32. is set, and the selector 14 enters a state in which the input A is selected in response to the output Q="1". Also, flip-flop 5
The output Q="1" of 0 is supplied to the differentiation circuit 56 and differentiated at the rising edge. At this time, the differential output _D0 sent from the differentiating circuit 56 sets the flip-flop 52 via the OR gate 58, and also sets the flip-flop 52 through the OR gate 58.
Flip-flop 54 is set via gate 60. Therefore, the selectors 28 and 26 are
The input A is selected in response to the output Q="1" of each of the flip-flops 52 and 54.
As described above, after the reading operation is started, the performance data read from the magnetic tape _30a is written into the performance data memory 38.

In this state, when the performance start switch ST is turned on, melody pitch data ML, chord/bass pitch data CBA, and rhythm sound source specification data RMA are sent from the performance data memory 38 as described above, and these data are Based on this, melody performance, chord performance, bass performance, and rhythm performance are automatically performed.

During such automatic performance, if you select either single finger mode or fingered chord mode using the above-mentioned function switch and select a specific rhythm using the above-mentioned rhythm select switch, the ABC function switch circuit Receives mode selection signal from 18
The OR gate 62 outputs the output signal “1” to the differentiating circuit 64
and rhythm select switch circuit 2.
OR gate 66 receiving the rhythm selection signal from 0
supplies an output signal “1” to the differentiating circuit 68.

The differentiating circuit 64 differentiates the output signal "1" of the OR gate 62 at the rising edge and generates a differential output _D11 .
The flip-flop 52 is reset. Therefore, the selector 28 enters a state in which the input B is selected in response to the output Q="0" of the flip-flop 52. Further, the differentiating circuit 68 differentiates the output signal “1” from the OR gate 66 at the rising edge and outputs a differential output D ₂₁
is generated and the flip-flop 54 is reset. Therefore, the output Q of flip-flop 54 is
In response to "0", the selector 26 enters a state in which input B is selected.

As a result, the rhythm sound is the rhythm sound source specified data.
It is now generated according to the rhythm pattern signal RMB instead of RMA. Also, keyboard 10
When a desired chord is specified with LK, the chord and bass tone based on the chord/bass pitch data CBB are played in a sharp shape according to the rhythm pattern selected in the pattern memory 22.

After this, when the function switch that was previously turned on to select the ABC mode is turned off, the differentiator circuit 64 performs a falling differential in synchronization with the output signal of the OR gate 62 changing from "1" to "0". output
Generate D ₁₂ . This differential output D ₁₂ is OR gate 5
Since the flip-flop 52 is set via the flip-flop 8, the selector 28 returns to the state of selecting the input A in response to the output Q="1" of the flip-flop 52. Also, when the rhythm selection switch that was previously turned on for rhythm selection is turned off, the differentiation circuit 68 is turned off.
A falling differential output _D22 is generated in synchronization with the change of the output signal of the OR gate 66 from "1" to "0". This differential output D ₂₂ sets the flip-flop 54 via the OR gate 60, so that the selector 26 returns to the state of selecting the input A in response to the output Q of the flip-flop 54 being "1".

As a result, rhythm sounds are again generated based on the rhythm sound source specification data RMA, and chords and bass sounds are again generated based on the chord/bass pitch data.
It will now be generated based on CBA.

If you wish to play the melody on the UK keyboard 10 while automatic accompaniment is being performed based on the chord/bass pitch data CBA and the rhythm sound source specification data RMA, turn on the UK selection switch 70 and reset the flip-flop 50. Just let it happen.

[Effect of idea]

As described above, according to this invention, the accompaniment information in the first storage means can be switched to the accompaniment pattern in the second storage means, and the accompaniment pattern in the second storage means can be switched to the accompaniment information in the first storage means. You can enjoy a wide variety of automatic accompaniment by switching between them. Moreover, since there is no need to provide a dedicated switch,
Another advantage is that the configuration and operation are simple.

[Brief explanation of the drawing]

The figure is a block diagram showing an electronic musical instrument according to an embodiment of the invention. 10...Keyboard, 12...Key press detection circuit, 14,
26, 28... Selector, 16... Chord/base data forming circuit, 18... ABC function switch circuit, 20... Rhythm select switch circuit, 22... Pattern memory, 38... Performance data memory, 50, 52, 54...R for selection control
-S flipflop.

Claims (1)

[Scope of Claim for Utility Model Registration] (a) A first storage means into which accompaniment information is to be written from the outside; (b) A detection output is sent by detecting writing of accompaniment information to the first storage means. (c) a second storage means storing a plurality of accompaniment patterns; (d) a pattern selection means for selecting any one of the plurality of accompaniment patterns; e) The pattern selection means detects that one of the accompaniment patterns has been selected and sends out a first detection output, and also detects that the accompaniment pattern has been deselected and sends out a second detection output. (f) selecting the first storage means according to either the detection output from the first detection means or the second detection output from the second detection means; and (g) a memory selection means for selecting the second memory means in response to a first detection output from the second detection means; (g) the memory selection means selects the first memory means; In the state in which the accompaniment information in the first storage means is selected, an accompaniment sound signal is generated based on the accompaniment information in the first storage means, and in the state in which the second storage means is selected in the storage selection means, the pattern is selected from among the plurality of accompaniment patterns. An automatic accompaniment device for an electronic musical instrument, comprising an accompaniment sound generating means for generating an accompaniment sound signal based on the accompaniment sound signal selected by the means.