JPH07152376A - Tempo adjustment device of electronic musical instrument - Google Patents

Abstract

PURPOSE:To provide a tempo adjustment device for an electronic musical instrument in which a tempo is adjusted employing a simple operation. CONSTITUTION:The device consists of a tempo control element which instructs an increase or a decrease of a tempo, tempo sound generating means 10, 18 to 22 which generate sound for tempo adjustment with the tempo specified by the tempo control element when the tempo control element is operated and a tempo adjustment sound is not generated, a tempo changing means 10 which changes the tempo of the sound for tempo adjustment in accordance with the operation of the tempo control element if the tempo adjustment sound is being generated when the tempo control element is operated, a stop instructing means which stops the sound generation of the means 10, 18 to 22 and a control means 10 which stops the generation of a tempo sound in accordance with the instruction of the stop instruction means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tempo adjusting device for an electronic musical instrument, which enables easy tempo adjustment.

[0002]

2. Description of the Related Art Generally, when a player wants to play an instrument at a predetermined tempo, he or she adjusts the tempo while listening to the sound generated at a constant tempo. Conventionally, for example, a metronome has been used as a tool for adjusting the tempo. That is, the sound generated by the metronome is adjusted to a predetermined tempo, and the performer adjusts the tempo by playing in accordance with the sound generated by the metronome.

In an electronic musical instrument having an automatic performance function, the electronic musical instrument is caused to perform an automatic performance such as a rhythm performance, and the tempo of the rhythm performance sound is adjusted to a desired tempo by operating a tempo operator. The method has been adopted.

[0004]

However, in the method of adjusting the tempo while generating a predetermined sound with the metronome described above, it is necessary to separately prepare a metronome or the like as a tool for adjusting the tempo, which is troublesome. .

Further, the method of operating the tempo operator while the electronic musical instrument is automatically playing to adjust the tempo is possible only when the electronic musical instrument has an automatic playing function. There is a problem that it is difficult to adjust the tempo of an electronic musical instrument that does not have a rhythm playing function because it does not need an automatic playing function like an electronic musical instrument.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tempo adjusting device for an electronic musical instrument which can adjust the tempo by a simple operation.

[0007]

In order to achieve the above object, a tempo adjuster for an electronic musical instrument according to the present invention has a tempo operator for instructing an increase or decrease of tempo, and the tempo operator is operated. At this time, if the tempo adjustment sound is not being produced, the tempo sound producing means for producing the tempo adjustment sound at the tempo designated by the tempo operator and the tempo operator are operated. At this time, if the tempo adjusting sound is being produced, the tempo changing means for changing the tempo of the tempo adjusting sound in response to the operation of the tempo operator, and the stop of the sound production by the tempo sound producing means. The present invention is characterized by including stop instruction means for instructing and control means for stopping the generation of the tempo sound according to the instruction of the stop instruction means.

For the same purpose, the tempo adjusting device for an electronic musical instrument according to the present invention increases or decreases the tempo in an electronic musical instrument that automatically performs a performance by generating an automatic performance sound based on automatic performance data prepared in advance. If the tempo manipulator for instructing, and the tempo manipulator is not being played and the tempo adjusting sound is not being sounded when the tempo manipulator is operated,
Tempo sound producing means for producing a sound for tempo adjustment at the tempo designated by the tempo operator at that time,
When the tempo operator is operated, the tempo of the tempo adjustment sound is set if the automatic performance is not being performed and the tempo adjustment sound is being generated, and the tempo of the automatic performance sound is set if the automatic performance is being performed. To change the tempo sound according to the operation of the tempo operator, a stop instruction means for instructing the tempo sound generation means to stop sounding, and stop the sounding of the tempo sound according to the instruction of the stop instruction means. And a control means.

For the same purpose, the tempo operator of the tempo adjusting device for an electronic musical instrument of the present invention includes a tempo up switch for instructing to raise the tempo and a tempo down switch for instructing to lower the tempo. It is characterized by having and.

For the same purpose, the stop instructing means of the tempo adjusting device for an electronic musical instrument of the present invention produces sound by the tempo sound producing means when both the tempo up switch and the tempo down switch are operated. Characterized by instructing to stop.

Further, for the same purpose, the tempo adjusting device for an electronic musical instrument of the present invention further comprises a suppressing means for suppressing the generation of the tempo sound, and when there is an instruction from the suppressing means, the tempo adjusting sound is generated. It is characterized by not pronouncing.

[0012]

In the tempo adjusting device of the present electronic musical instrument, if the tempo adjustment sound is not being produced when the tempo operator is operated, the tempo is adjusted to the tempo set by the tempo operator at that time. If the sound for the tempo adjustment is already being sounded, the tempo of the sound for the tempo adjustment being sounded is changed according to the operation of the tempo operator. The tempo adjusting sound generated above is stopped when there is an instruction from the stop instruction means.

As a result, when the performer tries to adjust the tempo, the tempo adjustment sound is generated only by slightly operating the tempo operator, and when the tempo is changed, the tempo operation is further performed. A desired tempo can be set by operating the child. Thus, for example, a metronome sound is generated as a tempo adjustment sound by operating the tempo operator, and the tempo can be changed by operating the same operator,
The tempo can be adjusted easily and the operability is excellent. Further, the sound for adjusting the tempo being sounded can be stopped by instructing the stop instruction means.

Further, in the tempo adjusting device of the present electronic musical instrument, when the tempo operator is operated in the electronic musical instrument that automatically performs the performance by generating the automatic performance sound based on the automatic performance data prepared in advance. If the automatic performance is not being performed and the tempo adjustment sound is not being sounded, the tempo adjustment sound is started to be sounded at the tempo set by the tempo operator at that time. Also, when the tempo control is operated, if the tempo adjustment sound is already being sounded but not during automatic performance, the tempo of the generated tempo adjustment sound is adjusted according to the tempo control operation. To change. on the other hand,
When the tempo operator is operated, no tempo adjustment sound is generated during automatic performance. The tempo adjusting sound generated above is stopped when there is an instruction from the stop instruction means.

Thus, when attempting to adjust the tempo during the automatic performance, the performer can adjust the tempo while listening to the musical tone being automatically played. In this case, since the tempo adjustment sound is not generated, there is no disturbing sound during tempo adjustment, and the adjustment is easy.
When the automatic performance is not being performed, the tempo adjustment sound is generated just by slightly operating the tempo operator, and if the tempo is to be changed, the tempo operator is further operated. By doing so, it is possible to set a desired tempo.

Further, the tempo adjusting device of the present electronic musical instrument is provided with a tempo up switch for instructing to raise the tempo and a tempo down switch for instructing to lower the tempo as tempo operators. A so-called up / down switch is used. This allows
The operating element itself can be constructed at low cost, and it can be easily used as a switch for exerting other functions, so that the electronic musical instrument can be reduced in size, weight, and cost.

Further, in the tempo adjusting device of the present electronic musical instrument, the tempo up switch and the tempo down switch used as tempo operators are also used as instructing means for instructing the sounding stop by the tempo sound producing means. That is,
When the tempo up switch and the tempo down switch are simultaneously operated, it is recognized that the tempo sound generating means has instructed to stop sounding. As a result, it is not necessary to provide a special operator for stopping the tempo adjusting sound, and the number of operators of the tempo adjusting device can be reduced.

Further, in the tempo adjusting device of the present electronic musical instrument, if the suppressing means specifies that the generation of the tempo adjusting sound should be suppressed, the tempo adjusting sound is not generated even during the automatic performance. I try not to generate. As a result, when the tempo is changed during normal performance, the tempo adjustment sound can be suppressed even if the tempo operator is operated. If the generation of the sound is not desired, it may be instructed in advance that the generation of the tempo adjustment sound should be suppressed by the suppressing means.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a tempo adjusting device for an electronic musical instrument of the present invention will be described in detail below with reference to the drawings. It should be noted that the present embodiment will be described focusing on the configuration and operation for adjusting the tempo by adopting a keyboard type electronic musical instrument, but the present invention is not limited to this, and a guitar type and various types of electronic instruments It can be applied to musical instruments.

In the following embodiment, a case where a metronome sound is used as a tempo adjusting sound will be described. With regard to the metronome sound, the sound indicating each beat is realized by, for example, a rim shot sound in the drum tone, and the sound indicating the beginning of the bar, that is, the time signature is realized by a hi-hat closed sound. The tones of the sounds indicating the beats and beats are not limited to those described above, and it goes without saying that various tones can be adopted.

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an electronic musical instrument to which a tempo adjusting device according to the present invention is applied. This electronic musical instrument is a central processing unit (hereinafter, "CP
U ”. ) 10, a program memory 11, a random access memory (hereinafter referred to as "RAM") 12, a panel interface circuit 13, a keyboard interface circuit 15, an automatic performance data memory 17, a waveform memory 18, and a tone generator 19 are a system bus. It is configured to be connected to each other at 30.

The CPU 10 corresponds to a part of the tempo sound producing means and the tempo changing means and control means, and controls the entire electronic musical instrument according to the control program stored in the program memory 11. This CP
U10 includes a timer (not shown), which is used to generate a timing of sounding or muting an automatic accompaniment and a timing of sounding a metronome sound in an automatic performance process described later.

A MIDI interface circuit 24 is connected to the CPU 10. The MIDI interface circuit 24 is a MIDI interface between the electronic musical instrument and an external device.
It controls the passing of data. Examples of the external device include a personal computer, a sequencer, and other electronic musical instruments that process MIDI data.

The program memory 11 is composed of, for example, a ROM. The program memory 11 stores not only the control program for operating the CPU 10 described above, but also various fixed data used by the CPU 10 for various processes. This program memory 1
The content of 1 is read by the CPU 10. That is, CP
The U10 reads a control program (command) from the program memory 11 for interpretation / execution, and also reads predetermined fixed data for use in various processes.

The RAM 12 is used for temporarily storing various data when the CPU 10 executes the control program. In the RAM 12, areas such as a data buffer, a register, a counter, and a flag are defined.

An operation panel 14 is connected to the panel interface circuit 13. The operation panel 14 is used to instruct the electronic musical instrument to perform various operations. For example, as shown in FIG. 2, an automatic performance start switch 140, a rhythm selection switch 141, a tempo down switch 142A and a tempo up switch. Tempo adjustment switch 142 and display 14 configured with switch 142B
3 etc. are provided. Although various switches and indicators other than those mentioned above are provided on the operation panel 14, the illustration of switches and indicators not directly related to the present invention is omitted in FIG.

The automatic performance start switch 140 is used to instruct the start or stop of the automatic performance. Regarding the operation mode of the electronic musical instrument, the automatic performance mode and the normal performance mode are alternately inverted each time the automatic performance start switch 140 is pressed.

The rhythm selection switch 141 is selected from various rhythms such as 8-beat, waltz, mambo, etc.
Used to select one rhythm. Each time the rhythm selection switch 141 is pressed, the type of rhythm is changed and the rhythm related to the change is selected as the rhythm to be automatically played.

The tempo adjustment switch 142 corresponds to the tempo operator and is composed of the tempo down switch 142A and the tempo up switch 142B as described above. The tempo adjustment switch 142 includes a tempo down switch 142A and a tempo up switch 14.
When 2B and 2B are pressed at the same time, they function as stop instruction means and are used to stop the generation of a tempo adjustment sound, that is, a metronome sound.

The tempo down switch 142A is also used.
The tempo up switch 142B is used not only for adjusting the tempo but also for issuing various instructions in the system setting mode. The system setting mode is an operation mode generally provided for setting various parameters in an electronic musical instrument. For example, when the automatic performance start switch 140 and the rhythm selection switch 141 are pressed at the same time, the system setting mode is set. Is configured to transition to. In this system setting mode, for example, the tempo down switch 142A and the tempo up switch 142B are operated to select a beat such as 1 beat, 2 beats, 3 beats, 4 beats ,. The time signature selected here is stored in the time signature buffer provided in the RAM 12. In this system setting mode, in addition to the above, you can set the volume, select the tone color, select the sound effect, and set the sound effect
Various other parameters can be set. According to such a configuration, there is an advantage that the number of switches provided in the electronic musical instrument can be reduced.

In this embodiment, when the tempo down switch 142A and the tempo up switch 142B are pressed at the same time, they function as stop instruction means to stop the metronome sound being sounded. As the stop instruction means, for example, a dedicated switch for stopping the metronome sound may be provided, or other switches (for example, the automatic performance start switch 140,
It may be configured to function as stop instruction means for stopping the metronome sound when some of the rhythm selection switches 141 etc.) are pressed simultaneously.

The display 143 is, for example, a 7-segment L
The ED display is provided for two digits. On the display 143, numbers, letters and the like are displayed according to the data sent from the CPU 10. For example, when the tempo adjustment switch 142 is operated, the tempo value to be set according to the operation is displayed. When the rhythm selection switch 141 is operated, the rhythm number of the rhythm selected according to the operation is displayed. In addition, display 1
The 43 is not limited to a 7-segment LED, but an LCD display or other display can be used, for example.

The panel interface circuit 13 controls transmission / reception of data between the operation panel 14 and the CPU 10. That is, the panel interface circuit 13
Sends a scan signal to the operation panel 14, and inputs a signal returned from the operation panel 14 indicating ON / OFF of each switch in response to the scan signal. Then, from this signal, panel data in which ON / OFF of each switch is associated with 1 bit is generated and sent to the CPU 10.
This panel data is stored in RAM1 under the control of CPU10.
2 and is used to determine the presence / absence of a panel event (details will be described later).

Further, the panel interface circuit 13 is
The display data sent from the CPU 10 is sent to the display device 143 of the operation panel 14. As a result, the display 143
Predetermined numbers or English letters are displayed on.

A keyboard device 16 is connected to the keyboard interface circuit 15. The keyboard device 16 has a plurality of keys for designating a pitch. Each key of the keyboard device 16 is provided with a key switch that opens and closes in conjunction with key depression or key release, and a signal indicating ON / OFF of the key switch is sent to the keyboard interface circuit 15.

The keyboard interface circuit 15 controls transmission / reception of data between the keyboard device 16 and the CPU 10. That is, the keyboard interface circuit 15 sends a scan signal to the keyboard device 16 and inputs a signal indicating the ON / OFF state of each key switch returned from the keyboard device 16 in response to the scan signal. Then, from this signal, key data in which ON / OFF of each key switch is associated with 1 bit is generated and sent to the CPU 10. This key data is stored in the RAM 12 under the control of the CPU 10 and is used to determine the presence / absence of a keyboard event (details will be described later).

The automatic performance data memory 17 is, for example, RO
It is composed of M. The automatic performance data memory 17 stores automatic performance data corresponding to a plurality of rhythms. A start address table is stored in the automatic performance data memory 17.

The automatic performance data is composed of three kinds of data for generating three part sounds such as chord, bass and drum. The automatic performance data of each part is created in the same format as MIDI data, for example, and includes step time data for instructing sounding timing. This automatic performance data memory 1
The automatic performance data stored in 7 is converted into a format that can be processed by the sound source 19 in the automatic performance processing described later, and is sent to the sound source 19.

The start address table is a table in which the start address of the automatic performance data corresponding to each rhythm is stored. When the rhythm is changed, the starting address (start address) of the automatic performance data corresponding to the newly selected rhythm is fetched from this start address table, and the reading of the automatic performance data is started from that address. .

The automatic performance data and start address table may be stored in a part of the RAM 12 instead of the automatic performance data memory 17. In this case, for example, a floppy disk device (or ROM card control device) is connected to the system bus 30, and automatic performance data and a start address table are stored in the floppy disk (or ROM card), for example, the power source of the electronic musical instrument. Floppy disk (or ROM installed in the floppy disk device at the time of loading)
The ROM1 which is inserted in the card control device) and the automatic performance data and the start address table are stored in the RAM1.
It may be configured so that it is loaded to 2.

The waveform memory 18 stores pulse code modulated (PCM) waveform data. The waveform memory 18 stores a plurality of types of waveform data corresponding to each tone color, each key range, key pressing speed, etc. in order to realize a plurality of tone colors. This waveform data is selected and read according to the tone color specified at the time of the sounding instruction, the pitch (key range) for which the sounding instruction is issued, the velocity of the sound related to the sounding instruction, and the like. Further, the waveform memory 18 stores waveform data of a drum rim shot sound and waveform data of a hi-hat closed sound as special waveform data for generating a metronome sound. These waveform data will be used in the automatic performance processing described later.
It is read at the timing of the metronome sound.

The sound source 19 is composed of, for example, a plurality of oscillators. Then, one to several oscillators are provided for each sounding channel defined for sounding a musical sound corresponding to a key depression of the keyboard device 16, a musical sound corresponding to each part of the automatic accompaniment, or a metronome sound. It is supposed to be assigned. The oscillator, to which the sound is assigned, reads the waveform data stored in the waveform memory 18 in a time division manner and adds an envelope to the waveform data to generate a digital musical tone signal. The digital tone signal generated by this sound source 19 is converted into a D / A converter 20.
Sent to.

The D / A converter 20 converts the input digital musical tone signal into an analog musical tone signal and outputs it. The analog tone signal output by the D / A converter 20 is sent to the amplifier 21.

The amplifier 21 amplifies the input analog musical tone signal with a predetermined amplification factor and outputs it. The analog tone signal output by the amplifier 21 is a speaker 22.
Sent to.

The speaker 22 is a known one which converts an analog musical tone signal as an electric signal into an acoustic signal. The speaker 22 emits a musical sound according to the operation of the keyboard device 16, a musical sound according to the automatic performance data read from the automatic performance data memory 17, or a metronome sound.

Next, the operation of the embodiment of the electronic musical instrument according to the present invention having the above-mentioned structure will be described with reference to the flow charts shown in FIGS.

FIG. 3 is a flow chart showing the main routine of this electronic musical instrument, which is started by turning on the power.
That is, when the power is turned on, first, initialization processing is performed (step S10).

In this initialization processing, the internal state of the CPU 10 is set to the initial state, and the initial values are set to the registers, counters or flags defined in the RAM 12. Further, in this initialization process, a process of sending predetermined data to the sound source 19 and preventing an unnecessary sound from being generated when the power is turned on is also performed. When this initialization processing is completed, switch event processing is then performed (step S11). Details of this switch event processing are shown in FIG.
Is shown in the flowchart.

In the switch event process, first, a panel scan is performed (step S20). That is, CPU
10 is the panel interface circuit 1 as described above.
From the operation panel 14 via the panel data (hereinafter,
It is called "new panel data". ) Is read. Next, the panel data that has been read last time and already stored in the RAM 12 (hereinafter referred to as "old panel data") is compared with the new panel data to create a panel event map in which different bits are turned on.

When the panel scan process, that is, the creation of the panel event map is completed in step S20, it is then checked whether or not there is a switch event (step S21). This is done by referring to the panel event map above. That is, if there is even one bit that is turned on in the panel event map, it is determined that there is a switch event.

If it is determined that there is no switch event, the switch process of step S22 is skipped and the process branches to step S23. On the other hand, when it is determined that there is a switch event, the switch process is performed on the switch having the event (step S2).
2). The details of this switch processing are shown in the flowchart of FIG.

In this switch processing, it is first checked whether or not there is an on event of the tempo up switch 142B (step S30). This is performed by checking whether the bit corresponding to the tempo up switch 142B in the event map is turned on and whether the bit corresponding to the tempo up switch 142B in the new panel data is turned on. . If it is determined that there is an on event of the tempo up switch 142B, the tempo up switch process is performed (step S31). Details of the tempo up switch process are shown in the flowchart of FIG.

In the tempo up switch process, it is first checked whether or not the automatic performance is being performed (step S4).
0). This is performed by the automatic performance start switch 14 performed in "other processing" (step S34 in FIG. 5) described later.
This is done by examining the autoplay flag that is turned on or off by the processing for the 0 event.

When it is determined that the automatic performance flag is on during the automatic performance, the tempo up process is performed (step S43). This tempo increase process is a process of incrementing the current tempo value stored in the tempo buffer provided in the RAM 12. As a result, the tempo of the musical sound is changed according to the incremented contents of the tempo buffer, regardless of whether or not the tempo down switch 142A has already been pressed. In this case, the tempo of the automatic performance sound is increased by the unit tempo (tempo corresponding to the "1" tempo value).

On the other hand, when it is determined in step S40 that the automatic performance is not being performed, that is, the automatic performance flag is off, it is then checked whether or not the tempo down switch 142A is on (step S41).
This is performed by checking whether or not the bit corresponding to the tempo down switch 142A in the old panel data is turned on. Here, if it is determined that the tempo down switch 142A is not turned on, it is recognized that only the tempo up switch 142B has been pressed while the automatic performance is not being performed.

Next, it is checked whether or not the metronome sound is being generated (step S45). This is RAM
This is performed by checking whether the metronome sound producing flag provided at 12 is turned on. If it is judged here that the metronome sound is not sounding,
A metronome sound generation start process is performed (step S46). In this metronome sound generation processing, the waveform address (fixed data) of the waveform memory 18 in which the waveform data for the metronome sound (the waveform data of the rim shot sound and the closed sound of the hi-hat) is stored, and the pitch of the metronome sound is specified. Sound source 1 includes frequency data (fixed data) to be played, envelope data (data corresponding to the contents of the volume buffer) for instructing the volume of the metronome sound, etc.
Sent to 9. As a result, the sound source 19 is brought into a state in which the metronome sound can be generated using the sounding channel assigned for sounding the metronome sound in the metronome sounding process described later. In the metronome sound generation start processing, the metronome sound generation flag is set to ON.

From the above, the automatic performance is not performed,
In addition, a function of starting generation of a metronome sound is realized when the tempo up switch 142B is operated while the metronome sound is not being generated. That is,
The player can generate the metronome sound of the tempo set at that time by simply touching the tempo up switch 142B.

On the other hand, if it is determined in the above step S45 that the metronome sound is being sounded, the tempo up processing is performed (step S43). The content of this tempo increase processing is as described above. By this tempo increase processing, the tempo of the metronome sound is increased by the unit tempo. As described above, the function of changing the tempo of the metronome sound (speeding up) is realized when the tempo up switch 142B is operated while the automatic performance is not being performed and the metronome sound is being produced. ing.

If it is determined in step S41 that the tempo down switch 142A is in the on state, the tempo down switch 1
It is recognized that the tempo up switch 142B is newly pressed while 42A is being pressed, so that both switches are simultaneously pressed.

Next, it is checked whether or not the metronome sound is being generated (step S42). If it is determined that the metronome sound is being produced, the metronome sound production stop processing is performed (step S4).
4). In this metronome sound generation stop processing, predetermined data is sent to the sound source 19. The sound source 19 stops the generation of the digital musical tone signal by the oscillator corresponding to the sounding channel assigned for the metronome sound sounding. As a result, the metronome sound generated from the speaker 22 is muted. In the metronome sound pronunciation stop processing, the metronome sound producing flag is cleared to off.

From the above, the automatic performance is not performed,
In addition, the tempo down switch 142A and the tempo up switch 1 while the metronome sound is being emitted.
The function of stopping the generation of the metronome sound when 42B is pressed at the same time is realized.

On the other hand, if it is determined in step S42 that the metronome sound is not being sounded, a tempo up process is performed (step S43). The content of this tempo increase processing is as described above. In this case, the automatic performance is not being performed, and the metronome sound is not being produced.
The tempo up switch 142B is operated while 2A is already pressed, and only the process of incrementing the contents of the tempo buffer is performed. After that, the process returns from this tempo up switch processing routine and returns to the switch processing routine.

In the switch processing routine, if it is determined in step S30 that the tempo up switch 152B is not the on event, then it is checked whether or not there is the tempo down switch 142A on event (step S32). This is performed by checking whether the bit corresponding to the tempo down switch 142A in the event map is turned on and whether the bit corresponding to the tempo down switch 142A in the new panel data is turned on. . If it is determined that there is an on event of the tempo down switch 142A, the tempo down switch process is performed (step S33). Details of this tempo down switch processing are shown in the flowchart of FIG. 7.

In the tempo down switch processing, it is first checked whether or not the automatic performance is being performed (step S5).
0). This is done in the same way as step S40 of FIG. If it is determined that the automatic performance flag is on during the automatic performance, the tempo down processing is performed (step S53). This tempo down process is
This is a process of decrementing the current tempo value stored in the tempo buffer provided in the AM 12. As a result, the tempo of the musical sound is changed according to the contents of the decremented tempo buffer regardless of whether or not the tempo up switch 142B has already been pressed. In this case, the tempo of the automatic performance sound is delayed by the unit tempo.

On the other hand, if it is determined in step S50 that the automatic performance is not in progress, that is, the automatic performance flag is off, it is then checked whether or not the tempo up switch 142B is on (step S51).
This is performed by checking whether the bit corresponding to the tempo up switch 142B in the old panel data is turned on. Here, if it is determined that the tempo up switch 142B is not on, it is recognized that only the tempo down switch 142A has been pressed while the automatic performance is not being performed.

Next, it is checked whether or not the metronome sound is being sounded (step S55), and if it is determined that the metronome sound is not being sounded, a metronome sound sound generation start process is performed (step S56). The processing of steps S55 and S56 is the same as the processing of steps S45 and 46 in FIG. As a result, the sound source 19 is brought into a state in which the metronome sound can be generated using the sounding channel assigned for sounding the metronome sound in the metronome sounding process described later. In the metronome sound generation start processing, the metronome sound generation flag is set to ON.

From the above, the automatic performance is not performed,
A function of starting generation of a metronome sound is realized when the tempo down switch 142A is operated while the metronome sound is not being generated. That is,
The player can generate the tempo sound set at that point by touching the tempo down switch 142A.

On the other hand, if it is determined in the above step S55 that the metronome sound is being produced, the tempo down processing is performed (step S53). The contents of this tempo down processing are as described above. By this tempo down processing, the tempo of the metronome sound is delayed by the unit tempo. As described above, when the tempo down switch 142A is operated while the automatic performance is not being performed and the metronome sound is being produced, the function of changing (slowing) the tempo of the metronome sound is realized. ing.

When it is determined in step S51 that the tempo up switch 142B is in the on state, the tempo up switch 1
It is recognized that the tempo down switch 142A is newly pressed while 42B is being pressed, so that both switches are simultaneously pressed.

Then, it is checked whether or not the metronome sound is being generated (step S52). If it is determined that the metronome sound is being produced, the metronome sound production stop process is performed (step S5).
4). The process of step S54 is the same as step S of FIG.
This is the same as the processing of 44. As a result, the metronome sound generated from the speaker 22 is muted. In the metronome sound pronunciation stop processing, the metronome sound producing flag is cleared to off.

As described above, the automatic performance is not performed,
In addition, the tempo down switch 142A and the tempo up switch 1 while the metronome sound is being emitted.
The function of stopping the generation of the metronome sound when 42B is pressed at the same time is realized.

On the other hand, if it is determined in step S52 that the metronome sound is not being sounded, tempo down processing is performed (step S53). The contents of this tempo down processing are as described above. In this case, the automatic performance is not being performed, and the metronome sound is not being produced.
The tempo down switch 142A is operated while 2B is already pressed, and only the process of incrementing the contents of the tempo buffer is performed. After that, the process returns from this tempo down switch processing routine and returns to the switch processing routine.

In the switch processing routine, if it is determined in step S32 that the tempo down switch 142A is not the on event, then "other processing" is performed (step S34). In this "other processing", processing for events of various switches provided on the operation panel 14 is performed.

In this "other processing", for example, the automatic performance start switch 140 in the panel event map is used.
When it is determined that there is an event of the automatic performance start switch 140 by checking whether or not the bit corresponding to is turned on, the automatic performance flag is inverted. The automatic performance flag is a flag provided in the RAM 12 and stores whether the electronic musical instrument is in the automatic performance mode or the normal performance mode. As a result, every time the automatic performance start switch 140 is pressed, the automatic performance mode and the normal performance mode are alternately repeated.

In this "other processing", for example, the rhythm selection switch 14 in the panel event map is selected.
If it is determined that there is an on event of the rhythm selection switch 141 by checking whether or not the bit corresponding to 1 is turned on, the rhythm changing process is performed. In this rhythm changing process, the rhythm selection switch 14
The number of the new rhythm selected by pressing 1 is set in the rhythm number register provided in the RAM 12. In this state, the automatic performance start switch 140
When is pressed, automatic performance is performed with the rhythm corresponding to the rhythm number register.

In this "other processing",
Although processing for various other switches provided on the operation panel 14 is also performed, the description thereof is omitted because it is not directly related to the present invention. When this "other processing" ends,
The process returns from this switch processing routine and returns to the switch event processing routine.

In the switch event processing routine, LED processing is then performed (step S23). This L
The ED process is a process of displaying predetermined data on the display 143 of the operation panel 14. In the LED process, for example, a process of displaying the tempo value set by operating the tempo adjustment switch 142 is performed. This display is realized by sending the data corresponding to the tempo value set in the tempo buffer to the operation panel 14 via the panel interface circuit 13. This allows the performer to know what tempo is currently set. When a new rhythm is selected using the rhythm selection switch 141, processing for displaying the rhythm number is performed. In this display, the data corresponding to the rhythm number set in the rhythm number register is displayed on the operation panel 14 via the panel interface circuit 13.
It is realized by sending to. This allows the performer to
You can know which rhythm is currently selected.

When this LED processing is completed, then vendor wheel processing is performed (step S24). This bender wheel process is a process of changing the pitch of a musical tone being sounded, for example, according to the operation of a bender wheel (not shown) provided on the operation panel 14. This bender wheel process is not directly related to the present invention, and therefore its explanation is omitted. When this vendor wheel process is completed, the process returns from the switch event process routine and returns to the main routine.

In the main routine, keyboard event processing is then performed (step S12). That is, CPU1
As described above, 0 reads the key data (hereinafter referred to as “new key data”) from the keyboard device 16 via the keyboard interface circuit 15. Next, the key data (hereinafter referred to as “key data” previously read and already stored in the RAM 12)
It is called "old key data". ) Is compared with the new key data to create a key event map with different bits turned on. Then, it is checked whether there is a key event by referring to this key event map. This is done by checking if there is any bit turned on in the key event map.

Here, if there is no bit that is turned on in the key event map, it is recognized that there is no key event, and this keyboard processing is terminated. On the other hand, if there is one or more bits that are turned on in the key event map, it is recognized that there is a key event, and it is checked whether the key event is an on event or an off event. This is done by checking if the bit in the new key data corresponding to the on bit in the event map is on.

When it is determined that the event is a key-on event, sound generation processing is performed. That is, the key number of the key related to the key depression, the tone color number selected at that time, the data indicating the keystroke strength, and the like are converted into data in a format that can be interpreted by the sound source 19, such as waveform address, frequency data, envelope data, and filter coefficient. It is converted and sent to the sound source 19. As a result, the sound source 19 activates the oscillator corresponding to the sounding channel assigned to the keyboard device 16. As a result, the oscillator reads the waveform data from the waveform memory 18 and adds the envelope to the waveform data to generate a digital tone signal. This digital musical tone signal is converted into an analog musical tone signal by the D / A converter 20 and is amplified by the amplifier 21 and then sent to the speaker 22. As a result, the musical sound corresponding to the key depression is generated from the speaker 22.

On the other hand, when it is determined that the event is the key-off event, the mute processing is performed. That is, the sounding oscillator corresponding to the key to be released is searched for, and predetermined data is sent to cancel the sound.

When this keyboard event processing is completed, MIDI processing is then carried out (step S13). In this MIDI processing, MIDI data is exchanged with an external device, such as another electronic musical instrument, a sequencer, or a computer, via the MIDI interface circuit 23. The change of the tempo is also performed by a MIDI message instructing the tempo. That is, when the MIDI message instructing the tempo change is received, the CP
The U10 sets the tempo data included in the MIDI message in the tempo buffer in the RAM 12. As a result, the tempo is changed in the same manner as when the operation panel 14 is operated to set the tempo. Other MIDI
The processing for the message is not directly related to the present invention, and thus the description thereof is omitted.

Upon completion of this MIDI processing, next,
Automatic performance processing is performed (step S14). In this automatic performance process, an automatic accompaniment process for generating a rhythm performance sound and a metronome sound generation process for generating a metronome sound are performed.

The automatic accompaniment process is performed when the automatic performance flag is turned on and it is time to read the automatic performance data. Whether or not it is the timing for reading the automatic performance data is determined by referring to the contents of a counter (not shown) that is counted according to the tempo value. When it is determined that it is the read timing, one piece of automatic performance data is read from the automatic performance data memory 17. Then, when the step time value included in the automatic performance data and the time value counted up by the time counter (not shown) match, it is recognized that sounding or mute is to be performed, and sounding or mute processing is performed. Be seen.

That is, if the automatic performance data is note-on data, sound generation processing is performed. In the tone generation processing, for example, waveform addresses, frequency data, envelope data, filter coefficients, etc. are generated based on the automatic performance data read from the automatic performance data memory 17, and are sent to the sound source 19. Then, the digital tone signal is generated by the sound source 19,
The D / A converter 20 converts the analog musical tone signal, the amplifier 21 amplifies the signal, and the amplified signal is sent to the speaker 22. As a result, a rhythm sound is emitted from the speaker 22.

On the other hand, if it is the note-off data, the muffling process is performed. In this muffling process, predetermined data is generated by the sound source 1.
9 is a process in which the generation of the digital musical tone signal in the sound source 19 is stopped and the sound being sounded is muted. The automatic performance data includes, for example, data for instructing tone color change, tempo change, etc. in addition to data for instructing note-on or note-off, but description thereof is omitted because it is not directly related to the present invention.

The metronome sounding process is shown in the flow chart of FIG. That is, in the metronome sound generation processing, it is first checked whether it is sound generation timing (step S60). This is done by checking to see if the metronome sounding flag is on and the 1/24 timing flag is on. Here, the 1/24 timing flag is a flag provided in the RAM 12, and when a timer (not shown) counts a predetermined number (1/24 of one beat).
(When the time of has elapsed) is set. At this time, the counter COUNT (not shown) is simultaneously incremented.

If it is determined that it is not the sounding timing, the process returns from the metronome sounding processing routine to the main routine. On the other hand, when it is determined that it is the sounding timing, the content of the counter COUNT is set to "24" in the time signature (specified in the system setting mode and stored in the time signature buffer of the RAM 12) at that time. It is checked whether or not the number multiplied by “”, for example, “24 × 4 = 96” if four-beat is specified (step S61). Here, if the above conditions are satisfied, it is recognized that it is the beginning of the bar, and the sounding process of the beginning of the bar is performed (step S64). In this sounding process, the closed sound of the hi-hat in the drum timbre is sounded. After this pronunciation processing, the counter C
OUNT clears to zero and leaves.

That is, the sound source 19 is assigned for the metronome sound based on the waveform address, the frequency data, the envelope data, the filter coefficient, etc. for generating the closed sound of the hi-hat received in the metronome start process (step S46 in FIG. 6). Starts the oscillator corresponding to the selected sound channel. As a result, the oscillator reads the waveform data for the closed sound of the hi-hat from the waveform memory 18 and generates a digital musical tone signal with an envelope added thereto. This digital tone signal is D /
It is converted into an analog tone signal by the A converter 20 and the amplifier 2
The signal is sent to the speaker 22 after a predetermined amplification is performed at 1. As a result, the high-hat closed sound is emitted from the speaker 22 as a sound indicating the beat.

If it is determined in step S61 that the above conditions are not satisfied, then it is checked whether the content of the counter COUNT is a multiple of "24" (step S62). When it is determined that the number is a multiple of "24", it is recognized that the timing at which the metronome sound should be generated has arrived, and the sound generation processing of beats other than the beginning of the bar is performed (step S63).

That is, the sound source 19 is used for the metronome sound based on the waveform address, frequency data, envelope data, filter coefficient, etc. for generating the drum rim shot sound received in the metronome start processing (step S46 in FIG. 6). Start the oscillator corresponding to the assigned sound channel. As a result, the oscillator reads the waveform data for the rim shot sound from the waveform memory 18 and generates a digital musical tone signal with an envelope added thereto. This digital musical tone signal is converted into an analog musical tone signal by the D / A converter 20 and is amplified by the amplifier 21 and then sent to the speaker 22. As a result, the rim shot sound of the drum is produced from the speaker 22 as a metronome sound. After that, the process returns from the metronome sound generation routine and returns to the main routine. It should be noted that in the above step S62, "24"
If it is determined that the metronome sound should not be emitted at a timing that is not a multiple of, it returns from this metronome sounding processing routine without performing sounding processing and returns to the main routine.

When the automatic performance process is completed, then
"Other processing" is performed (step S15). The "other processing" includes a tone color changing processing accompanying the depression of a foot pedal (not shown). Then step S1
Returning to 1, the same processing is repeated thereafter. Step S above
When an event based on a panel operation or a keyboard operation occurs in the process of repeatedly executing 11 to S14, various functions as an electronic musical instrument are exhibited by performing processing corresponding to the event.

As described above, according to the tempo adjusting apparatus of this embodiment, in the electronic musical instrument having the automatic performance function, the tempo adjusting switch 142 is composed of the tempo down switch 142A and the tempo up switch 142B,
When the tempo adjustment switch 142 is operated, if the automatic performance is not being performed and the metronome sound is not being produced, the metronome sound is started to be produced at the tempo set by the tempo adjustment switch 142 at that time. Further, when the tempo adjustment switch 142 is operated, if the metronome sound is already being generated although the automatic performance is not being performed, the tempo of the generated metronome sound is set to the tempo adjustment switch 1
It changes according to the operation of 42. On the other hand, when the tempo adjustment switch 142 is operated, the metronome sound is not generated during the automatic performance. In addition, the metronome sound generated above is used for the tempo down switch 142A and the tempo up switch 1 which constitute the tempo adjustment switch 142.
It is stopped when there is a simultaneous push of 42B.

As a result, when the performer tries to adjust the tempo, the metronome sound is generated by slightly operating either the tempo down switch 142A or the tempo up switch 142B constituting the tempo adjusting switch 142. When changing the tempo, the tempo can be set to a desired tempo by further operating the tempo down switch 142A or the tempo up switch 142B. In this way, the metronome sound is used as the tempo adjustment sound.
A is generated by operating the A or tempo up switch 142B, and the tempo can be changed by operating the same tempo down switch 142A or tempo up switch 142B. Therefore, tempo adjustment becomes easy and operability is excellent. It has become a thing. In addition, the metronome sound being produced is the tempo down switch 142A.
By simultaneously pressing the tempo up switch 142B, the metronome sound can be stopped.

When attempting to adjust the tempo during automatic performance, the performer can adjust the tempo while listening to the musical tone being automatically played. In this case, since the metronome sound is not generated, there is no disturbing sound when adjusting the tempo, and the adjustment is easy.

As the tempo adjustment switch 142,
By adopting a so-called up / down switch having a tempo up switch 142B for instructing to raise the tempo and a tempo down switch 142A for instructing to lower the tempo, the switch itself can be configured at low cost. Also, it becomes easy to use it as a switch for exerting other functions, so that the electronic musical instrument can be reduced in size, weight, and cost.

Further, in the tempo adjusting device of the present electronic musical instrument, the tempo up switch 142B and the tempo down switch 142 used as the tempo adjusting switch 142 are used.
A is also used to stop the metronome sound. That is, when the tempo up switch 142B and the tempo down switch 142A are pressed at the same time, the generation of the metronome sound is stopped. Thus, it is not necessary to provide a special switch for stopping the metronome sound, and the number of switches of the tempo adjusting device can be reduced.

The above embodiment is applied to an electronic musical instrument having an automatic performance function, in which the tempo is adjusted by the automatic accompaniment sound during the automatic accompaniment, and the tempo is adjusted by the metronome sound when the automatic accompaniment is not performed. As described above, it is needless to say that it can be applied to an electronic musical instrument that does not have an automatic playing function.

In addition to the structure of the above embodiment, a switch is provided as a suppressing means for suppressing the metronome sound, and the generation and stop of the metronome sound are controlled only when the switch is turned on. It can also be configured to do so. In this case, it is possible to suppress the generation of metronome sound during normal performance, which is more convenient.

In the above embodiment, the metronome sound is generated based on the waveform data stored in the waveform memory 18. However, in an electronic musical instrument having an automatic performance function, the metronome sound is generated. The automatic performance data may be stored in the automatic performance data memory 17, and the automatic performance data may be generated by the automatic performance processing. In this case, a variety of tones can be generated as a metronome sound.

Further, in the above embodiment, the metronome sound is not generated during the automatic accompaniment. For example, by simultaneously pressing the tempo up switch 142B and the tempo down switch 142A during the automatic accompaniment, the automatic accompaniment is performed. It can be configured to generate a metronome sound with the sound.

[0103]

As described in detail above, according to the present invention,
It is possible to provide a tempo adjusting device for an electronic musical instrument that can adjust the tempo by a simple operation.

[Brief description of drawings]

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

FIG. 2 is a diagram showing an example of an operation panel used in an embodiment of the present invention.

FIG. 3 is a flowchart (main routine) showing the operation of the embodiment of the present invention.

FIG. 4 is a flowchart (switch event processing routine) showing the operation of the embodiment of the present invention.

FIG. 5 is a flowchart (switch processing routine) showing the operation of the embodiment of the present invention.

FIG. 6 is a flowchart (tempo up switch processing routine) showing the operation of the embodiment of the present invention.

FIG. 7 is a flowchart (tempo down switch processing routine) showing the operation of the embodiment of the present invention.

FIG. 8 is a flowchart (metronome sound generation processing routine) showing the operation of the embodiment of the present invention.

[Explanation of symbols]

 10 CPU 11 Program Memory 12 RAM 13 Panel Interface Circuit 14 Operation Panel 15 Keyboard Interface Circuit 16 Keyboard Device 17 Automatic Performance Data Memory 18 Waveform Memory 19 Sound Source 20 D / A Converter 21 Amplifier 22 Speaker 23 MIDI Interface Circuit 30 System Bus 140 Automatic Performance start switch 141 Rhythm selection switch 142 Tempo adjustment switch 142A Tempo down switch 142B Tempo up switch 143 Indicator

Claims (5)

[Claims] 1. A tempo operator for instructing an increase / decrease in tempo, and if a tempo adjustment sound is not being produced when the tempo operator is operated, an instruction is given by the tempo operator at that time. The tempo sound producing means for producing a tempo adjustment sound at the set tempo, and the tempo of the tempo adjustment sound if the tempo adjustment sound is being produced when the tempo operator is operated. A tempo changing means for changing the tempo sound according to the operation of the tempo operator, a stop instructing means for instructing to stop the sound generation by the tempo sound producing means, and a control for stopping the sounding of the tempo sound in response to the instruction of the stop instructing means. A tempo adjusting device for an electronic musical instrument, comprising: 2. An electronic musical instrument for automatically performing a performance by generating an automatic performance sound based on automatic performance data prepared in advance, and a tempo operator for instructing an increase / decrease in tempo, and the tempo operator operating the tempo operator. And the tempo adjustment sound is not being produced, the tempo sound producing means produces the tempo adjustment sound at the tempo designated by the tempo operator at that time. When the tempo operator is operated, if the tempo adjustment sound is not being played and the tempo adjustment sound is being generated, the tempo of the tempo adjustment sound is set. Tempo changing means for changing the tempo in accordance with the operation of the tempo operator, stop instruction means for instructing to stop sounding by the tempo sound producing means, and tempo sound of the tempo sound in response to the instruction of the stop instructing means. Control means allowed to stop the sound, the tempo control apparatus for an electronic musical instrument characterized by comprising the city. 3. The tempo operator is provided with a tempo up switch for instructing to raise the tempo and a tempo down switch for instructing to lower the tempo. The tempo adjusting device for an electronic musical instrument according to claim 2. 4. The stop instruction means gives an instruction to stop sounding by the tempo sound producing means when both of the tempo up switch and the tempo down switch are operated. Tempo adjustment device for electronic musical instruments. 5. The method according to claim 1, further comprising deterring means for deterring the sounding of the tempo sound, and not producing the sound for tempo adjustment when there is an instruction from the deterring means.
5. The tempo adjusting device for an electronic musical instrument according to claim 4.