JPH0128556Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an automatic rhythm performance device for an electronic musical instrument, and more particularly to an improvement of an automatic rhythm performance device in which rhythm patterns can be programmed.

[Summary of the idea]

This invention enables hand percussion on the condition that the memory in which the rhythm pattern is to be stored is empty, thereby eliminating the silence that occurs due to the memory being empty and allowing hand percussion to be performed. This eliminates the need for a dedicated operator for selection.

[Conventional technology]

Traditionally, performers can program arbitrary rhythm patterns into RAM (random access memory).
An automatic rhythm performance device is known in which a rhythm pattern is stored in a memory such as, for example, a rhythm pattern is read out from this memory to generate rhythm sounds (see, for example, Japanese Patent Laid-Open No. 54-48515).

Furthermore, an automatic rhythm playing device capable of hand percussion is also known, and this device is provided with a switch for selecting a hand percussion mode, and hand percussion is possible only when this switch is turned on. Ta.

[Problem that the invention attempts to solve]

With the programmable automatic rhythm performance device described above, if you forget to program the rhythm pattern and turn on the playback switch, the memory is empty and no rhythm sound is generated, resulting in a silent state. It was hot.

Furthermore, if it is assumed that such an automatic rhythm performance device is equipped with a hand percussion function, a switch for selecting the hand percussion mode must be added, which complicates the panel configuration and panel operation. There were also some inconveniences.

[Means for solving problems]

This invention was made to solve the above-mentioned problem, and allows hand percussion on the condition that the rhythm pattern memory is empty when the playback switch is turned on. It is characterized by the following.

That is, the automatic rhythm playing device for an electronic musical instrument according to this invention includes a readable/writable storage device, a programming means for programming a desired rhythm pattern into the storage device, an operator, and a controller based on the operation of the operator. a reading means for reading a rhythm pattern from a storage device, a keyboard, and key press data corresponding to the operation of at least some keys of the keyboard, on condition that an operator is operated and the storage device is empty. and a rhythm sound generating means that generates a rhythm sound signal according to the rhythm pattern read from the storage device and also generates a rhythm sound signal based on key press data output from the output means. It is equipped with the following.

[Effect]

According to the configuration of this invention, when the controller is operated, if a rhythm pattern is stored in the storage device, a rhythm sound is played according to the rhythm pattern; (not stored), it becomes possible to generate rhythm sounds based on keyboard operations (hand percussion). Therefore, if a rhythm pattern is not programmed, the silence can be eliminated by continuing the rhythm performance using the hand percussion. Further, since hand percussion is possible without programming a rhythm pattern, there is no need to provide a dedicated operator for hand percussion selection.

〔Example〕

The figure shows the circuit configuration of an automatic rhythm performance device according to an embodiment of this invention. The main functions of the automatic rhythm playing device of this example are as follows (1) to (4).

(1) Select any typical rhythm pattern such as march, waltz, swing, mambo, etc. stored in the first rhythm pattern memory 10, and generate rhythm sounds according to the selected rhythm pattern. .

(2) Keyboard 1 is stored in the second rhythm pattern memory 12.
Program a rhythm pattern based on the key press operations in step 4.

(3) Generate rhythm sounds according to the rhythm pattern programmed in the second rhythm pattern memory 12.

(4) If no rhythm pattern is programmed into the second rhythm pattern memory 12, the keyboard 1
Hand percussion is performed by driving various percussion instrument sound sources in the rhythm sound source circuit 16 based on the key depression operations No. 4.

The first rhythm pattern memory 10 is a ROM
(read-only memory)
Two measures of typical rhythm patterns as described above are stored for each rhythm type. The rhythm pattern to be read from the memory 10 is the ring counter 1.
It is selected according to the count output CDA of 8. Also,
The rhythm pattern selected according to the count output CDA is read out according to the count output CDB of the counter 22, which repeatedly counts the tempo clock signal TCL from the tempo oscillator 20 in units of two bars.

The rhythm pattern data PTA read from the memory 10 is supplied to the gate circuit 24. Rhythm pattern data supplied to gate circuit 24
PTA is connected to the OR circuit 2 when the gate circuit 24 is conductive.
6 to the rhythm sound source circuit 16.

The second rhythm pattern memory 12 is a RAM
(Random Access Memory)
It is possible to store two measures worth of rhythm patterns based on key press operations on the keyboard 14. The rhythm pattern stored in the memory 12 is read out according to the count output CDB of the counter 22.

The rhythm pattern data PTB read from the memory 12 is supplied to the gate circuit 28. Rhythm pattern data supplied to gate circuit 28
PTB is connected to the OR circuit 2 when the gate circuit 28 is conductive.
6 to the rhythm sound source circuit 16.

The rhythm sound source circuit 16 generates various percussion instruments such as a bass drum, snare drum, cymbal, high-hat closed, high-hat open, maracas, conga, bongo, etc. according to the rhythm pattern data PTA or PTB supplied as described above. A rhythm sound signal is generated by selectively driving a sound source. and,
The rhythm sound signal generated from the rhythm sound source circuit 16 is supplied to the sound system 30 and converted into sound.

The keyboard 14 has, for example, 37 keys _F1 to _F4 , and is adapted to send out key press data KD indicating the pressed key each time one or more keys are pressed. Of the key press data KD, B ₃ , C ₄ ,
Key press data KDA corresponding to 5 keys of D ₄ , E ₄ and F ₄
are supplied to the distribution circuit 32, and key press data KDB corresponding to other keys is supplied to the melody sound source circuit 34.

The distribution circuit 32 sends input data to the output terminal A or B in response to the control input SA becoming "1" or "0", respectively. control input
When SA is "1", the key press data KDA is supplied to the second rhythm pattern memory 12 on the one hand, to the gate circuit 36 on the other hand, and not to the melody sound source circuit 34. Gate circuit 36
The key press data KDA supplied to gate circuit 3
6 is turned on, the signal is supplied to the rhythm sound source circuit 16 via the OR circuit 26.

Key press data supplied to the rhythm sound source circuit 16
KDA selects predetermined percussion instrument sound sources, for example, B ₃ key is bass drum, C ₄ key is snare drum, D ₄ key is high hat closed, E ₄ key is high hat open, E ₄ key is bongo. to generate a rhythm sound signal. The rhythm sound signal generated in this manner is supplied to the sound system 30 and converted into sound. Therefore, the keyboard 14
This enables hand percussion based on key press operations.

On the other hand, in the distribution circuit 32, when the control input SA is "0", the key press data KDA is supplied to the melody sound source circuit 34, but not to the second rhythm pattern memory 12 and the gate circuit 36. In this case, the melody sound source circuit 34 is supplied with both key press data KDA and KDB.

The key press data supplied to the melody sound source circuit 34 may be the key press data KDB alone or the key press data KDA and KDB together, as described above, but the data is supplied in either case. According to the key press data, a musical tone signal corresponding to the pressed key is formed. The musical tone signal generated by the melody sound source circuit 34 is then supplied to the sound system 30 and converted into sound. Therefore, it is possible to generate musical tones (typically melody tones) based on key press operations on the keyboard 14.

In the control circuit for controlling the rhythm sound generation section and the musical tone generation section as described above, the external operator is a stop switch for stop control.
STP and start/rhythm selection switch SRT/RHY for rhythm start and rhythm selection
, a play switch PLY for enabling rhythm performance or hand percussion according to a programmed rhythm pattern, and a program switch PRO for enabling programming. In addition, the start/rhythm selection switch
An R-S-T flip-flop 38 responsive to SRT/RHY and stop switch STP, an R-S flip-flop 40 responsive to play switch PLY and stop switch STP, and an R-S flip-flop 42 responsive to program switch PRO and stop switch STP. It is provided.

Now, when a power switch (not shown) is turned on, an initial clear signal IC is generated. This initial clear signal IC resets the flip-flop 38 and also resets the ring counter 18.

Next, start/rhythm selection switch SRT/
When RHY is turned on, its on signal is OR gate 4
4 to set flip-flop 38.
Therefore, the stop signal STOP formed from the output of the flip-flop 38 becomes "0", and in response, the reset of the tempo oscillator 20 and the counter 22 is canceled, and the counter 22 starts counting the tempo clock signal TCL. At this time, since the ring counter 18 has been reset by the initial clear signal IC, the rhythm to be read from the first rhythm pattern memory 10 is determined by the count output CDA of all bits "0" corresponding to the reset state. A pattern (for example, a march rhythm pattern) is selected.

Therefore, the selected rhythm pattern is successively outputted from the memory 10 in accordance with the count output CDB of the counter 22, and the rhythm pattern data PTA is outputted. This rhythm pattern data PTA is supplied to the rhythm sound source circuit 16 via the gate circuit 24 which is conducting at this time and further via the OR circuit 26, so that the rhythm pattern data PTA is
Rhythm sounds are played according to the selected rhythm pattern. Then, such rhythm performance is repeated every two bars.

After this, if you want to change the rhythm that is being played,
Turn on the start/rhythm selection switch SRT/RHY. At this time, the rhythm run signal RUN consisting of the output Q of the flip-flop 38 is "1",
The output signal of the inverter 46 is also "1". Therefore, the on signal of switch SRT/RHY is
It is input to the ring counter 18 via the AND gate 48 and counted. Therefore, from the memory 10, the count output of the ring counter 18 at this time is
A rhythm pattern different from the previous one (for example, a waltz rhythm pattern) is read out in accordance with the CDA. As a result, rhythm sounds are generated according to a rhythm pattern different from the previous one. Then, in the same manner, the rhythm pattern is changed every time the switch SRT/RHY is turned on, and an arbitrary rhythm can be selected by operating a single switch.

If you want to stop the rhythm being played, turn on the stop switch STP. This switch
The STP ON signal is passed through the AND gate 50, which is made conductive by the rhythm run signal RUN, and further
Trigger flip-flop 38 via OR gate 52. Therefore, while the rhythm run signal RUN becomes "0", the stop signal STOP becomes "1".
In response to this, the tempo oscillator 20 and counter 22 are reset. Therefore, the rhythm performance is stopped.

Next, the program operation will be explained. First, when the program switch PRO is turned on, the on signal sets the flip-flop 42. Therefore, the program mode signal PROG consisting of the output Q of the flip-flop 42 becomes "1". The program mode signal PROG resets the flip-flop 40 via the OR gate 54, and operates as shown in (1) to (9) below.

(1) By making the AND gate 48 non-conductive via the inverter 46, the rhythm start is prohibited during the program operation.

(2) Flip-flop 3 via OR gate 44
By setting the value 8, the reset of the tempo oscillator 20 and counter 22 is released. As a result, the count output CDB of the counter 22 is supplied to the second rhythm pattern memory 12.

(3) A write mode signal WR is supplied to the memory 12 to put the memory in write mode.

(4) Generate a pulse from the one-shot circuit 56 to reset the memory 12 (erase the memory contents)
At the same time, the R-S flip-flop 57 for memory empty detection is set.

(5) By making the AND gate 58 conductive, the timing signal T4 corresponding to the quarter note timing in the count output CDB is supplied to the rhythm sound source circuit 16. timing signal T4
drives the high-hat close sound source in the rhythm sound source circuit 16, so the sound system 3
Starting from 0, a high-hat close sound is generated at the timing of a quarter note. The reason why the high-hat close sound is generated in this way is to make it easier to obtain the rhythm of the hand percussion when performing a program.

(6) Rhythm pattern data is generated by making the gate circuit 24 non-conductive via the NOR gate 60.
Prohibit sending PTA.

(7) The key press data KDA is supplied to the distribution circuit 32 via the OR gate 62, and is sent out from the output terminal A of the distribution circuit 32.

(8) By making the gate circuit 36 conductive via the OR gate 62, the key press data KDA is supplied to the rhythm sound source circuit 16.

(9) By making the AND gate 59 conductive,
The flip-flop 57 can be reset by the output signal of the OR gate 61 which inputs the key press data KDA. That is, flip-flop 57, which was set as described above at the start of the program mode, is reset when any of the keys B ₃ , C ₄ , D ₄ , E ₄ and F ₄ is pressed, and its output Q
becomes “0”.

Therefore, the program mode signal PROG is “1”
After this, you can play the rhythm with the hand percussion on the keyboard 14 by pressing the appropriate keys in time with the high-hat close sound that is generated at the timing of a quarter note. The rhythm pattern for two measures can be stored in the memory 12. When the rhythm pattern is stored in the memory 12 in this way, the flip-flop 57 is reset, so the AND gate 6 is reset in response to its output Q="0".
3 becomes non-conductive.

After programming the rhythm pattern in the memory 12 as described above, press the stop switch STP.
Turn on. The ON signal at this time resets the flip-flop 38 and resets the flip-flop 42 via the OR gate 64, and the program mode signal PROG becomes "0" accordingly.

Next, the operation when the play switch PLY is turned on will be explained.

When play switch PLY is turned on, its on signal sets flip-flop 40. Therefore, the play mode signal PLAY consisting of the output Q of the flip-flop 40 becomes "1". This play mode signal resets flip-flop 42 via OR gate 64 while
It acts like (4).

(1) Conducted by stop signal STOP
via AND gate 66 and further OR gate 52
triggers flip-flop 38 via.
As a result, the tempo oscillator 20 and the counter 22
The reset is released, and the count output CDB of the counter 22 is supplied to the memory 12. At this time, the memory 12 is in the read mode because it has received the program mode signal PROG="0" as the read mode signal. Therefore, the count output from the memory 12 is
According to CDB, the previously programmed rhythm pattern data PTB is sent out.

(2) By making the gate circuit 28 conductive, the rhythm pattern data PTB is transferred to the rhythm sound source circuit 16.
be supplied to

(3) Rhythm pattern data is generated by making the gate circuit 24 non-conductive via the NOR gate 60.
Prohibit sending PTA.

(4) On the condition that the AND gate 63 is conductive, the distribution circuit 32 and gate circuit 36 are controlled via the OR gate 62 in the same manner as in the program mode described above to enable hand percussion. . Here, the AND gate 63 becomes conductive when nothing is written after erasing the contents of the memory 12 (the memory 12 is empty), and the AND gate 63 becomes conductive when the output Q of the flip-flop 57 is The conduction is controlled according to the value of 1".

Therefore, after the play mode signal PLAY becomes "1", if a rhythm pattern is stored in the memory 12, a rhythm sound is generated according to the rhythm pattern data PTB from the memory 12, and the rhythm sound is generated in accordance with the rhythm pattern data PTB from the memory 12.
If nothing is stored in the keyboard 14, hand percussion using the keyboard 14 becomes possible. Such a play mode operation can also be started by turning on the play switch PLY while a rhythm performance based on the above-mentioned rhythm pattern data PTA is being performed. That is, in this case, since the AND gate 66 is non-conductive due to the stop signal STOP="0", the play mode signal
PLAY="1" does not trigger flip-flop 38 and tempo oscillator 20 and counter 22 continue to operate. Therefore, rhythm pattern data
Rhythm performance is performed based on the rhythm pattern data PTB instead of PTA, and if the memory 12 is empty, hand percussion using the keyboard 14 becomes possible.

To end play mode operation, turn on the stop switch STP. The ON signal at this time resets the flip-flop 38 and resets the flip-flop 40 via the OR gate 54, and the play mode signal PLAY becomes "0" accordingly.

In the above embodiment, the fact that the second rhythm pattern memory 12 is empty is detected by the flip-flop 57 that responds to erasing and writing to the memory 12;
When PLY is on, the memory 12 may be read at high speed to detect the absence of data.

[Effect of idea]

As described above, according to this invention, when a playback controller is operated, if a rhythm pattern is stored in RAM, a rhythm sound is generated according to that rhythm pattern, and if RAM is empty, a rhythm sound is generated according to that rhythm pattern. Since hand percussion is enabled, even if no rhythm pattern is programmed, rhythm performance can be continued by hand percussion, eliminating the silent state that occurs with conventional devices. In addition, since the hand percussion mode can be selected without programming the rhythm pattern, there is no need to provide a dedicated operator for selecting the hand percussion mode, which simplifies the panel configuration and panel operation. It's also effective.

[Brief explanation of drawings]

The figure is a circuit diagram showing the circuit configuration of an automatic rhythm performance device according to an embodiment of the invention. 12... Rhythm pattern memory, 14... Keyboard, 16... Rhythm sound source circuit, 20... Tempo oscillator, 22... Counter, 28, 36... Gate circuit, 32... Distribution circuit, 57... Memory empty detection Flip-flop, PLY...play switch.

Claims (1)

[Claims for Utility Model Registration] (a) A readable/writable storage device, (b) Programming means for programming a desired rhythm pattern into this storage device, (c) An operator, and (d) This operation (e) a keyboard; and (f) reading means for reading out the rhythm pattern from the storage device based on the operation of the operator; (g) generating a rhythm sound signal in accordance with a rhythm pattern read from the storage device;
An automatic rhythm performance device for an electronic musical instrument, comprising: rhythm sound generation means for generating rhythm sound signals based on key press data output from the output means.