JPH096360A - Automatic accompaniment device of electronic musical instrument - Google Patents

Abstract

PURPOSE: To provide an automatic accompaniment device of electronic musical instrument having a pedal function which give an instruction for performing the sound production of the chord inputted by key operation by operating a foot switch. CONSTITUTION: This automatic accompaniment device has a chord determining means 15 which determines the chords corresponding to depressed keys, a chord table 16 which stores a correspondence chart of the keys and chords to be referred to at the time when the chord determining means 15 determines the chords, a temporary memory means 17 which temporarily stores the chords determined by the chord determining means 15, a sound production instruction means 14 which gives an instruction for the sound production by reading out the chords stored in the temporary storage means 17 and an operating detecting means 13 which detects the on/off of the sound production instructing means 14 and transmits the result thereof to a CPU10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument having an automatic accompaniment function, which is capable of suppressing the pronunciation of a chord which is input incorrectly and controlling the timing of the pronunciation of the inputted chord.

[0002]

2. Description of the Related Art In recent years, electronic musical instruments having various functions have become widespread and commonly used. Among such electronic musical instruments, one having an automatic accompaniment function is known.

The automatic accompaniment function refers to a chord table stored in a memory in advance in response to a pressed key on the keyboard, and produces a chord corresponding to the key. The code is read out and pronounced.

In a low-priced automatic accompaniment device,
Some keys do not have a code assigned, and when such a key is pressed, a certain code, such as C
Some are configured to pronounce major chords.

Therefore, when the player mis-touches and presses the adjacent key or simultaneously presses the two keys, an unexpected chord may be sounded and the musical tone may be significantly impaired.

On the other hand, the player often immediately notices a mis-touch between the performances. When the mis-touch is followed and the correct key is pressed again in a hurry, a chord sound due to the mis-touch is first produced. Then the correct chord sound is pronounced. This is also a cause of impairing the musical tone.

Therefore, there has been a demand for an automatic accompaniment device having a function of, when a player notices a mistouch, not pronouncing a chord input by the mistouch.

Also regarding the timing of sounding the automatic accompaniment, it is difficult for a beginner to use both hands well, and the melody and accompaniment sound cannot be played rhythmically, so the sounding timing of the accompaniment sound is controlled well. There was a need for a way to do it.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and in an automatic accompaniment device for an electronic musical instrument having a pedal function, the generation of a chord input by key operation is performed by operating a foot switch. An object is to provide an automatic accompaniment device having a function of giving an instruction.

[0010]

DISCLOSURE OF THE INVENTION According to the present invention, a code determining means 15 for determining a code corresponding to a depressed key, and a correspondence between the key and the code referred to when the code determining means 15 determines the code. Code table 16 for storing a table
A temporary storage means 17 for temporarily storing the chord decided by the chord decision means 15, a sounding instruction means 14 for giving an instruction to read and pronounce the code stored in the temporary storage means 17, and the pronunciation. The operation detecting means 13 detects ON / OFF of the instruction means 14 and notifies the CPU of the ON / OFF state.

Further, the automatic accompaniment apparatus for an electronic musical instrument according to the present invention is provided with a switching means 3A, and the switching means 3A can switch between a normal performance mode and a mode for instructing the sounding by the sounding instructing means 14. To be done.

The switching means 3A is provided on the operation panel.

The temporary storage means 17 is configured so that the code corresponding to the detected key is overwritten each time the key is pressed.

The sound production instructing means 14 is composed of a foot switch or a side switch provided on the pedal.

[0015]

The automatic accompaniment apparatus for an electronic musical instrument of the present invention is provided with the temporary storage means 17 for temporarily storing the chord decided by the chord decision means 15, and the chord input by the key depression is
It is stored in the temporary storage means 17.

Next, when the inputted chord is a proper chord and it is desired to sound the chord, the player operates the sounding instructing means 14 at a desired timing, and is stored in the temporary storing means 17. The chord that is being read is read and pronounced.

As a result, even a beginner who cannot use his left and right hands well can easily control the timing of sounding chords by operating the foot switch with his feet.

Further, when an input error is made due to a miss-touch, if the proper code is re-input from the keyboard without operating the pronunciation instruction means 14, the code is already stored in the temporary storage means 17 and the wrong touch is made. Since the input code is overwritten, the appropriate code is read and sounded by subsequently operating the sounding instruction means 14.

Usually, a skilled person often immediately notices a mistaken touch such as a slip of a hand. Therefore, when a mistouch is made, the correct code is re-input without operating the pronunciation instruction means 14 and then the pronunciation instruction means 14 is operated, so that the code due to the mistouch can be corrected to a correct code without being pronounced. An easy-to-use automatic accompaniment device for an electronic musical instrument can be provided.

Further, for example, by providing the operation panel with a switching means 3A for switching between a normal performance mode and a mode in which the sound generation instructing means 14 of the present invention causes a chord to be generated, the use mode can be switched and the applicable range is expanded and widened. Applicable to a layer of people.

[0021]

1 is a block diagram schematically showing the overall structure of an electronic musical instrument to which an automatic accompaniment apparatus according to the present invention is applied. Hereinafter, the automatic accompaniment apparatus of the present invention will be described with reference to the drawings.

In the figure, 10 is a CPU, 11 is a ROM, 12 is a RAM, 13 is an operation detector, and 14
Is a foot switch as a sounding instruction means for instructing sounding.

Further, 1 is a keyboard, 2 is a key press detecting section, 3 is an operation panel, 4 is a panel scan circuit, 5 is a tone signal generating section, 6 is a waveform memory, 7 is a D / A converter, and 8 is an amplifier. ,
9 is a speaker.

The CPU 10 controls each part of the electronic musical instrument in accordance with a control program stored in the program memory part of the ROM 11, reads the operation of the foot switch 14 detected by the operation detecting part 13 and gives an instruction to generate a chord. Is.

Further, the CPU 10 includes a code determining section 1
5 is provided, key depression information of the key detected by the key depression detection unit 2 is sent to the code determination unit 15, and the code determination unit 15 refers to the code table 16 based on this information.
The code corresponding to the pressed key is determined, and the temporary storage unit 17
To memorize.

The ROM 11 stores various fixed data in addition to the program for operating the CPU 10 described above. The code table 16 referred to when determining the code corresponding to the depressed key is provided in the ROM 11.

The code table 16 is provided in the ROM 11 and is a table that is referred to when determining the code corresponding to the key detected by the key depression detection unit 2. The code determination unit 15 refers to the table 16. Determine the code.

The RAM 12 has a work area for the CPU 10,
Various registers, counters, flags, buffers, and the like for controlling the electronic musical instrument are defined.
1 has a data area in which necessary data is transferred and temporarily stored.

Further, a plurality of registers in which data necessary for sound emission are set corresponding to the setting states of the respective operators and switches of the operation panel 3 and the respective tone generation circuits of the tone signal generator 5 are set to unused channels. The RAM 12 is also provided with an assigner memory for storing data for allocation, a storage area for storing tone information, and the like.

The code determined by the code determining section 15 is stored in the temporary storage section 17 provided on the RAM 12,
When the foot switch 14 is operated, the CPU 10 reads and sounds the sound.

The operation detector 13 detects the on / off state of the foot switch 14 and sends it to the CPU 10.
The PU 10 instructs the chord stored in the temporary storage unit 17 by the signal from the operation detecting unit 13.

The foot switch 14 is operated by the performer in order to sound the chords stored in the temporary storage section 17, and when the switch 14 is pushed down, the switch is turned on, and the turned-on signal is activated. It is detected by the detection unit 13.

The keyboard 1 is used for designating a musical sound to be generated, and is composed of a plurality of keys and a key switch which opens and closes in conjunction with key pressing / release operations of these keys. The key depression / key release operation of the performer is detected by the key depression detection unit 2, and the detected signal is sent to the tone signal generation unit 5 under the control of the CPU 10.

The code information generated by pressing or releasing the key of the keyboard 1 is converted into a code by the code determining section 15 and stored in the temporary storage section 17, and the foot switch 14 is operated.
The sound is instructed by the operation of and is read by the CPU 10.

The key-depression detection section 2 detects the key-depression / key-release operations of the player, that is, the on / off state of the key, and transmits the detected on / off information to the tone signal generation section 5 together with the key number. is there. The CPU 10 stores this key on / off information in a predetermined area on the RAM 12.

In addition to the power switch, the operation panel 3 is provided with various switches and indicators such as a tone color selection switch, a mode designation switch, an effect selection switch and a rhythm selection switch. The changeover switch 3A directly related to the present invention is provided on the operation panel 3.

The set / reset state of each switch of the operation panel 3 is adapted to be detected by the panel scan circuit 4 included therein, and information on the set state of the switch detected by the panel scan circuit 4 is stored in the CPU 10. It is stored in a predetermined area on the RAM 12 under the control of.

The tone signal generator 5 reads the tone waveform data and envelope data corresponding to the signal output from the CPU 10 from the waveform memory 6, adds the envelope to the read tone waveform data, and outputs the tone signal. is there.

The tone signal output from the tone signal generator 5 is analog-converted by the D / A converter 7 and then supplied to the amplifier 8. For this purpose, a waveform memory 6 for storing waveform data and envelope data is connected to the tone signal generator 5.

The amplifier 8 amplifies the analog tone signal supplied from the D / A converter 7 with a predetermined gain. The output of the amplifier 8 is supplied to a speaker 9.

The speaker 9 converts an analog tone signal as an electric signal sent from the amplifier 8 into an acoustic signal. That is, the musical tone is emitted according to the generated musical tone signal.

In such a structure, the player switches to the sounding instruction mode by the foot switch with the changeover switch 3A before the performance starts. Next, when the performance is started and the player presses a key to specify a corresponding code, the chord determining unit 15 reads a chord corresponding to the key from the chord table 16 and stores the chord in a predetermined area of the temporary storage unit 17. Let

Subsequently, when it is determined that the chord input by the player is a proper chord, the foot switch 14 is stepped on to turn it on. The operation detector 13 detects the operation of the foot switch 14 and sends it to the CPU 10.

Based on this signal, the CPU 10 reads the code stored in the temporary storage section 17 and sends it to the tone signal generation section 5, whereby a predetermined code is sounded.

On the other hand, when it is determined that the input chord is incorrect due to a touch error or the like, the performer does not operate the foot switch 14 and subsequently reenters an appropriate chord.
As a result, the reentered proper chord is overwritten in a predetermined area of the temporary storage unit 17, and the proper chord is sounded by operating the foot switch 14.

In the present embodiment, the case of the foot switch 14 is described as an example, but the present invention is not limited to this.
However, the function may be assigned to the side switch 23 of the expression pedal so that the side switch 23 can be switched by operating the changeover switch 3A.

FIG. 2 shows the footswitch 14 as the sound generation instruction means.
FIG. 3 is an external view illustrating the configuration in the case of.

As shown in the figure, in the present embodiment, a foot switch 14 as a sounding instructing means is newly provided and the switch 1
A cord for transmitting the operation of 4 to the electronic musical instrument main body and a jack for connecting the cord to the electronic musical instrument main body are provided.

The changeover switch 3A provided on the operation panel 3 is a switch for changing over between a normal performance mode and a mode for instructing sound generation by operating the foot switch 14 of the present invention.

The function of suppressing erroneous pronunciation due to a miss-touch according to the present invention can be realized with such a simple structure. Further, according to the present invention, since the sound generation is instructed by operating the foot switch 14, it is possible to control the sound generation timing.

FIG. 3 is a diagram for explaining an example in which the sounding instructing means of the present invention is a side switch 23 of an expression pedal which has been conventionally provided.

In recent years, there are electronic organs and the like having an expression pedal 21 with a side switch 23 as a switch for operating, for example, starting and stopping an automatic performance. The present embodiment realizes the function of the present invention with a simple structure by applying the side switch 23 according to the sound generation instruction means.

The figure is a view for explaining an example of the relationship between the attachment positions of the side switch lever 22 and the expression pedal 21 in the electronic organ.

In the figure, 21 is an expression pedal, 22 is a side switch lever, 23 is a side switch which is turned on / off by operating the side switch lever 22, and 24 is a side switch lever 22.
Is the fulcrum of rotation.

In such a structure, when the performer instructs the chord to be produced during the performance, the side switch lever 22
By operating the toe in the direction of arrow A, the side switch lever 22 rotates about the fulcrum 24, the other end of the side switch lever 22 moves in the direction of arrow B, and the side switch 23 is turned on. Instruct pronunciation.

The ON state of the side switch 23 is detected by the operation detecting section 13, and the detection result is transmitted to the CPU 10, which causes the CPU 10 to read out the code stored in the temporary storage section 17 and sound it.

As a result, the player can give a sounding instruction at a desired timing without releasing the keyboard 1 during the performance, which is very easy to use.

According to the present embodiment, the circuit uses the circuit of the conventional side switch 23 only by providing the changeover switch 3A on the operation panel 3 with the changeover switch 3A for changing over to the sounding instruction of the present invention. The present invention can be realized with a simple structure.

FIG. 4 is a flow chart for explaining the operation of the embodiment according to the present invention. The operation of this embodiment will be described below with reference to the drawings.

Prior to the start of playing, the performer first sets the mode by the change-over switch 3A to suppress the sounding of the erroneously input chord of this embodiment. Then, the performance is started and the player presses the key of the desired chord (step S11).

The depressed key is detected by the depressed key detection unit 2, and the detected key signal is sent to the CPU 10. C
The code code determination unit 15 of the PU 10 reads the code corresponding to the depressed key from the code table 16 based on the signal (step S12).

The read code is sent to the temporary storage unit 17 of the RAM 12 and stored in a predetermined area (step S13).

Then, it is judged whether or not the code entered by the key is proper (step S14). This judgment is made by the performer, and if the inputted chord is proper, then the performer turns on the foot switch 14 (step S15).

The player makes the judgment in the above step S14 because the player who is proficient will usually notice immediately when a mistouch is made, so that the judgment is left to the player.

By changing the timing of turning on the foot switch 14 in step S15,
It becomes possible to control the timing of pronunciation.

When the foot switch 14 is turned on, the operation is detected by the operation detecting section 13, and the foot switch 1
A signal indicating that 4 is turned on is sent to the CPU 10,
The CPU 10 reads the code stored in the temporary storage memory 17 based on the signal, and reads it out from the code generator.
To (step S16).

The tone signal generator 5 generates a predetermined tone based on the sent code and sends it to the D / A converter 7. After the predetermined conversion and amplification are added by this, the speaker 9
Pronounced from That is, the pronunciation process of the input chord is performed (step S17), the process returns to step S11, and the process for the next chord input is repeated.

On the other hand, if it is determined in step S14 that the chord entered by the performer is an error due to a miss-touch, then the foot switch 14 in step S15 is not operated, and the correct chord is reproduced. Make an input. That is, the process returns to step S11 to perform key input.

As a result, the code input by the miss-touch is not pronounced, the re-input code is overwritten in the temporary storage unit 17, the code is read and pronounced, and the pronunciation of the mis-touched code is not generated. Suppressed.

[0070]

As described above in detail, according to the present invention, it is possible to suppress the pronunciation of an erroneously input code due to a mistouch with a simple structure improvement, and it is possible to control the timing of the pronunciation. In addition, since it is not necessary to manually operate the sounding means during the performance, the operability is remarkably improved.

Further, by providing the changeover switch, it is possible to switch between the normal performance mode and the mode for controlling the sound generation of the chords by the foot switch, so that a wide range of application fields can be expected.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an automatic musical instrument of an electronic musical instrument of the present invention.

FIG. 2 is an explanatory diagram of an example in which a sounding instruction unit is provided on a foot switch.

FIG. 3 is an explanatory diagram of an example in which a sounding instruction means is provided on a side switch.

FIG. 4 is a flowchart illustrating the operation of the present invention.

[Explanation of symbols]

 1 keyboard 2 key press detection unit 3 operation panel 3A changeover switch 4 panel scan circuit 5 tone signal generation unit 6 waveform memory 7 D / A converter 8 amplifier 9 speaker 10 CPU 11 ROM 12 RAM 13 operation detection unit (operation detection means) 14 foot switch (pronunciation means) 15 chord determination section (chord determination means) 16 chord table 17 temporary storage section (temporary storage means) 21 expression pedal 22 side switch lever 23 side switch 24 fulcrum

Claims (5)

[Claims] 1. A code deciding means for deciding a code corresponding to a depressed key, a code table for storing a correspondence table of keys and codes referred to when the code deciding means decides a code, and the code. Temporary storage means for temporarily storing the code determined by the determination means, sounding instructing means for instructing to read out the code stored in the temporary storage means and sound, and detecting ON / OFF of the sounding instructing means An automatic accompaniment apparatus for an electronic musical instrument, comprising: an operation detecting unit that transmits the operation to the CPU. 2. The electronic accompaniment apparatus according to claim 1, wherein the automatic accompaniment device for an electronic musical instrument includes a switching means, and the switching means can switch between a normal performance mode and a mode for instructing sound generation by a foot switch. Automatic instrument accompaniment device. 3. The automatic accompaniment apparatus for an electronic musical instrument according to claim 2, wherein the switching means is provided on an operation panel. 4. The automatic accompaniment apparatus for an electronic musical instrument according to claim 1, wherein the temporary storage means overwrites a code corresponding to the key each time the key is pressed. 5. The sound producing instruction means is a foot switch,
An automatic accompaniment device for an electronic musical instrument according to claim 1, wherein the automatic side accompaniment device is a side switch provided on a pedal.