JP6700891B2 - Control device for pedal operator - Google Patents

Description

  The present invention relates to a control device for a pedal operator that exerts a sostenuto function, a damper function, and a soft function on a musical sound by pedal operation in an electronic musical instrument that reproduces sounds such as a piano and an organ.

An electronic musical instrument sends musical tone data generated by operating a keyboard or an operation panel to a sound source provided inside the electronic musical instrument, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-187, and a musical tone corresponding to the musical tone data of the sound source. A tone is generated by generating a signal and converting it into an acoustic signal with a speaker.
With regard to the volume produced by the electronic musical instrument, the rotary angle or the dial switch, which is an operating element, is used to perform analog/digital conversion of the rotation angle and movement amount using a potentiometer to obtain a voltage value (AD value). Volume control is performed.

Further, the electronic musical instrument is provided with a pedal simulating an acoustic piano as an operator in order to exert a predetermined acoustic effect on a musical sound. These pedal controls include a damper pedal that controls the time until the tone is muted, a soft pedal that softens the tone by lowering the volume to cause a timbre change, and a tone that corresponds to the key that pressed the pedal. There are sostenuto pedals that only give the same effect as the damper pedal.
Some of these pedal operators detect the pedal depression amount as a voltage and linearly detect it by using an A/D converter. However, in actuality, a desired depression amount can be obtained by comparing the depression amount with a threshold value. It is used as a pedal operator whose sound effect is controlled on/off.

  Further, Patent Document 2 discloses a mechanism in an electronic musical instrument having an external expression pedal, which changes the read musical tone information according to the amount of depression of the expression pedal.

Japanese Patent No. 3296518 JP-A-7-225580

According to the manipulator described in Patent Document 1, a single function is usually assigned to each manipulator, and the manipulator is used to operate a specific function. Therefore, it was not possible to control two functions with one operator.
In addition, although some operators have multiple functions assigned to them, it is only possible to control two functions simultaneously in perfect synchronization, and one operator can control two functions independently. Did not exist.

  According to the expression pedal described in Patent Document 2, a predetermined function is assigned according to the amount of depression, but no control function is assigned to the "play" portion of the pedal.

  The present invention has been proposed in view of the above circumstances, and in a pedal operator of an electronic musical instrument that exerts a desired acoustic effect function, by effectively utilizing the "play" portion, a single pedal operator can It is an object of the present invention to provide a control device for a pedal operator that can individually operate other unrelated functions.

In order to achieve the above-mentioned object, the control device for a pedal operator according to claim 1 is an operation detecting means for detecting the pedal operation with respect to a pedal operator of an electronic musical instrument that exhibits a plurality of functions by pedal operation, and the pedal. Threshold exceeding judgment means for judging whether or not the operation exceeds a preset threshold with respect to the depression amount, and a desired function is exhibited when the pedal operation exceeds the threshold, and the pedal operation is the threshold. not exceed when returning to the initial value of the off state, e Bei and a pedal function executing means to exert a function other than the desired function, wherein the desired function, sostenuto, damper, one of the soft It is characterized in that the function other than the desired function is a function of changing an internal parameter of the electronic musical instrument .

Control device for pedal terminal according to claim 2, for functions other than the desired functions definitive to claim 1, in place of the "ability to change the internal parameters of the electronic musical instrument" of the external device connected to the "electronic musical instrument It is characterized by having "control function" .

According to a third aspect of the present invention, in the pedal operator control device according to the first aspect , the function of changing the internal parameter is any one of a tone color change, a volume change, a metronome speed change, a recording start, and a reproduction start. It is characterized by

The pedal operating device control device according to claim 4, wherein the pedal operating device that performs a plurality of functions by pedal operation is preset with operation detecting means for detecting the pedal operation, and the pedal operating operation is preset for the depression amount. A threshold crossing judging means for judging whether or not the threshold value is exceeded, and the pedal operation exceeds the threshold value, while demonstrating the sostenuto function when the pedal operation does not return to the initial value in the off state within a set constant time, Pedal operation executing means for exhibiting a function other than the sostenuto function when the pedal operation exceeds the threshold value and returns to the initial value in the off state within the fixed time.

According to a fifth aspect of the present invention, the control device for a pedal operator according to the fifth aspect is characterized in that the functions other than the sostenuto function are functions for changing internal parameters of the electronic musical instrument.

According to a sixth aspect of the present invention, in the pedal operator control device according to the sixth aspect, the function of changing the internal parameter is any one of a tone color change, a volume change, a metronome speed change, a recording start, and a reproduction start. It is characterized by

Control device for pedal terminal according to claim 7, in claim 5, wherein the pedal operating element is a pedal of an electronic musical instrument, the functions other than the sostenuto function is control function of the external device connected to the electronic musical instrument It is characterized by

  According to the control device for a pedal operator of the present invention, a single pedal operation can be performed by separately operating separately assigned functions with an operation that is not used when a desired sound effect function is executed. The child can individually operate other functions that are not related to each other.

That is, according to the control device of the pedal operator of claim 1, the operation detecting means detects the pedal operation, the threshold crossing judging means judges whether or not the pedal operation exceeds the threshold value, and the pedal function executing means When the pedal operation exceeds the threshold value, the desired function is exerted, and when the pedal operation does not exceed the threshold value, the function other than the desired function is exerted to prevent the desired function from being exerted. Without doing so, another function other than the desired function can be exhibited by an individual operation.
Thereby, in addition to any one function (desired function) of sostenuto, damper, and software, a function of changing internal parameters of the electronic musical instrument can be exerted.

According to the control device for the pedal operator of the second aspect, in addition to the function of any one of the sostenuto, the damper, and the software, the control function of the external device connected to the electronic musical instrument can be exerted.

  According to the control device for a pedal operator of the third aspect, any one of a tone color change, a volume change, a metronome speed change, a recording start, and a reproduction start can be exhibited as a function of changing an internal parameter. .

  According to the control device of the pedal operator of the fourth aspect, in addition to the function of any one of the sostenuto, the damper, and the software, the control function of the external device connected to the electronic musical instrument can be exerted.

According to the pedal operator control device of claim 4 , the operation detecting means detects the pedal operation, the threshold crossing judging means judges whether or not the pedal operation exceeds the threshold value, and the pedal function executing means judges the pedal operation. When the operation exceeds the threshold value, the sostenuto function is exerted when the initial value of the off state is not returned within the set constant time, and the pedal operation exceeds the threshold value and is turned off within the constant time. By causing the function other than the sostenuto function to be exerted when returning to the initial value of, the other functions other than the sostenuto function can be exerted by individual operations without hindering the exertion of the sostenuto function.

According to the controller of the pedal operator of the fifth aspect , in addition to the sostenuto function, a function of changing internal parameters of the electronic musical instrument can be exerted.

According to the pedal operator control device of the sixth aspect , any one of a tone color change, a volume change, a metronome speed change, a recording start, and a reproduction start can be exhibited as a function of changing an internal parameter. .

According to the pedal operator control device of the seventh aspect , the control function of the external device connected to the electronic musical instrument can be exhibited as a function other than the sostenuto function.

It is a block diagram which shows the hardware constitutions of the electronic musical instrument provided with the control apparatus of a pedal operator. It is a block diagram for explaining a function of a control device of a pedal operator. It is a flowchart figure which shows the processing procedure (operating method) in the control apparatus of a pedal operator. It is a flowchart figure which shows the other example of the processing procedure (operation method) in the control apparatus of a pedal operator.

Hereinafter, an electronic musical instrument including a controller for a pedal operator according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing the main hardware configuration of a digital piano (electronic musical instrument). A CPU 10, a ROM 11, a RAM 12, a key scan circuit 16, a sound source 18, and a digital signal processing circuit 19 are connected to a bus 30. The configuration is built on the computer.
The CPU 10 is provided with a volume switch 13 for adjusting the volume of sound produced by a rotating operation, a sliding operation, etc., an operation panel 14 for selecting a tone color and setting a sound (setting of reverberation effect, etc.), and MIDI data transfer control with an external device. A MIDI interface circuit 15 for performing the operation and a pedal operator 1 for exerting various acoustic effects on a musical sound are connected.

  The volume switch 13 is a rotary type or dial switch which is an operator, and performs analog/digital conversion of an operation amount (physical input), which is a rotation angle or a movement amount, by a potentiometer to obtain a voltage value (AD value), Volume control is performed by the change of the AD value.

  The pedal operator 1 is a damper pedal 1c that controls the time until the tone is muted, a soft pedal 1b that softens the tone by lowering the volume to cause a timbre change, and a tone corresponding to the key pressed by the pedal. It is composed of a sostenuto pedal 1a that gives the same effect as the damper pedal, and a physical input is performed by the amount of depression with respect to each pedal. That is, the pedal depression amount (operation amount) is analog/digital converted by a potentiometer to be detected as a voltage value (AD value), and when the AD value exceeds a preset predetermined value (threshold value), Reverberation effect control is performed by exhibiting a desired acoustic effect on a musical sound.

  According to the control device for a pedal operator of the present embodiment, the acoustic effect is turned on/off by comparing the depression amount of the pedal operator with a threshold value, and the "play" portion which is a dead zone that does not reach the threshold value is effective. The feature is that it can be used to display a function different from the desired acoustic effect. The detailed processing procedure for exhibiting another function by operating the pedal operator in the dead zone will be described later.

  The keyboard 17 is composed of a plurality of keys used by the performer to instruct the pitch of a musical tone and a key switch that opens and closes in synchronization with the keys. The keyboard 17 is connected to a key scan circuit 16 which scans the state of the key switch and outputs it as key data.

The CPU 10 controls the entire digital piano (electronic musical instrument) according to a control program stored in the ROM 11. The control program includes a pedal operator control program that controls a function based on an input from the pedal operator 1, thereby constructing a pedal operator control device on a computer.
Further, the CPU 10 performs an assigner process for assigning a sounding channel to a key pressed on the keyboard 17, an access process for the sound source 18, and the like.

  The ROM 11 stores various programs executed by or referred to by the CPU 10, various data, and the like. The programs and data stored in the ROM 11 are referred to by the CPU 10 via the system bus 30. That is, the CPU 10 is configured to read a control program (command) from the ROM 11 via the system bus 30 for interpretation/execution and read predetermined fixed data for use in arithmetic processing.

  The RAM 12 is used as a working memory that temporarily stores various data necessary for the CPU 10 to execute a program. For example, the AD value acquired by A/D converting the operation amount (physical input) of each operator of the pedal operator 1 and the volume switch 13, the operation processing data by the operation panel 14, the key fetched from the keyboard 17. Data and the like are temporarily stored in the RAM 12. The data stored in the RAM 12 is referred to by the CPU 10 via the system bus 30.

  The key scan circuit 16 scans the state of the key switch of the keyboard 17 and outputs it as key data indicating the on/off state of the key. The key data is sent to the CPU 10 via the system bus 30 and temporarily stored in the RAM 12.

  The tone generator 18 is driven according to the musical tone data (waveform address created corresponding to the tone color number, frequency data created corresponding to the key number, etc.) sent from the CPU 10, and generates a digital musical tone signal in a time division manner. . The digital tone signal generated by the sound source 18 is output to the digital signal processing circuit 19.

  The waveform memory 40 is composed of, for example, a ROM, and stores pulse code modulated (PCM) waveform data. The waveform memory 40 stores a plurality of types of waveform data (specified by tone color numbers) corresponding to each tone color in order to realize a plurality of tone colors. The waveform data stored in the waveform memory 40 is read by the sound source 18.

  The digital signal processing circuit 19 performs a predetermined calculation between the digital tone signal input from the sound source 18 and the coefficient input from the CPU 10 and outputs the result. For example, when the depression amount of the pedal operator 1 (for example, the damper pedal 1c) exceeds a threshold value, a coefficient giving a desired acoustic effect and a digital musical tone signal are calculated, and an acoustic effect (for example, a damper effect) is added. Generates a digital tone signal. The digital tone signal generated by the digital signal processing circuit 19 is supplied to the D/A converter 20.

  The D/A converter 20 converts the digital musical tone signal supplied from the sound source 18 into an analog musical tone signal. 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 musical tone signal amplified by the amplifier 21 to a predetermined level is supplied to the speaker 22.

  The speaker 22 converts an analog musical tone signal as an electric signal into an acoustic signal. That is, the physical input of the pedal operator 1 (for the sound volume corresponding to the depression of each key on the keyboard 17 to the volume adjusted by the physical input (rotation amount, movement amount, etc.) by the operator that controls the volume. A sound effect (for example, a damper effect) that is on/off controlled by the amount of depression is added to produce a sound.

FIG. 2 is a block diagram showing the functions of the pedal operating device control device built in the CPU 10 in the electronic musical instrument by the pedal operating device control program. In FIG. 2, a control device for individually exerting the sostenuto function and other functions in response to pedal operation of the sostenuto pedal 1a will be described.
The control device for the pedal operator is a sostenuto pedal (pedal operator) 1a operated by a player of an electronic musical instrument stepping on it with a foot, and an operation detecting means 2 for detecting a depression amount (operation amount) of the sostenuto pedal 1a. An A/D converter 3 that obtains an AD value by performing analog/digital (AD) conversion on the depression amount (physical input) of the sostenuto pedal 1a, and whether the AD value exceeds a preset threshold value It is provided with a threshold value excess judging means 4 for judging whether or not, and a pedal function executing means 5 for deciding a corresponding function from an operation progress based on an operation amount and an operation time of the pedal and executing the function.

The operation detection means 2 detects the amount of depression (operation amount) by the sostenuto pedal (pedal operator) 1a as a voltage value. The detected voltage value is output to the A/D converter 3, and analog/digital (AD) conversion is performed to obtain the AD value.
The threshold value excess judging means 4 judges whether or not the depression amount converted into the AD value exceeds a preset threshold value. Then, whether or not the sostenuto function is added to the musical sound is determined based on this threshold value. That is, a dead band is set in which the sostenuto function is not turned on when the depression amount does not exceed the threshold value.

The pedal function executing means 5 exerts a sostenuto function for a musical sound when the pedal operation exceeds the threshold value, and also exerts a function other than the sostenuto function when the pedal operation does not exceed the threshold value.
The functions other than the sostenuto function may include changing internal parameters of the electronic musical instrument and various control functions for external devices connected to the electronic musical instrument.

The internal parameters of the electronic musical instrument include tone color change, recording start, playback start, volume change, metronome speed change, and the like. The timbre change is to change the timbre (acoustic piano sound, organ sound, etc.) produced by the electronic musical instrument. Recording start means to start recording a musical sound, and reproduction start means to start reproduction of an accompaniment or the like stored in advance in the electronic musical instrument. Volume change is to change the volume produced by the electronic musical instrument. Changing the speed of the metronome is to change the speed of the electronic musical instrument when the metronome is built in.
When the electronic musical instrument itself is provided with a liquid crystal display unit capable of displaying musical scores, the function of feeding and returning musical scores may be exerted by changing internal parameters.

  Examples of the control function related to the external device include a music score feed/return function when a music score is displayed on the display unit of the tablet 23 connected to the electronic musical instrument, a music file reproduction control function in an externally connected device, and a recording.・Consider functions such as starting and stopping recording.

Next, a specific method of operating the sostenuto pedal in the control device for the pedal operator will be described with reference to the flowchart of FIG. 3 and the block diagrams of FIGS. 1 and 2.
First, when the electronic musical instrument is started by turning on the power, initialization processing of the CPU 10, the RAM 12, the sound source 18, etc. is performed. In the initialization process, a process of clearing registers and flags inside the CPU 10, a process of setting initial values for various buffers, registers and flags defined in the RAM 12, an initial value is set in the sound source 18, and unnecessary sounds are produced. A process for preventing the above is performed.

Next, as the processing of the main routine, the operation amount (physical input) of the operator (volume switch 13 and pedal operator 1) is detected, and the A/D converter 3 acquires the AD value.
The description will be made focusing on the sostenuto pedal 1a in the pedal operator 1. When the sostenuto pedal 1a is depressed, the AD value decreases from the initial value (sostenuto pedal off state) according to the depression amount (step 51).
The AD value (depression amount) of the sostenuto pedal is compared with a preset threshold value (step 52), and the AD value decreases and exceeds the threshold value (in this example, the AD value decreases according to the depression amount). Therefore, if the AD value is less than the threshold value), the sostenuto function is executed for the musical sound as a normal operation (step 53).

If it does not exceed the threshold value in step 52 (does not fall below the threshold value), it is determined whether or not the depression amount of the sostenuto pedal 1a has returned to the initial value (sostenuto pedal off state) (step 54).
When the depression amount of the sostenuto pedal 1a returns to the initial value (the operation is in the dead zone), a pre-assigned function other than the sostenuto function is executed (step 55). As described above, functions other than the sostenuto function are changes in internal parameters of the electronic musical instrument and various control functions for external devices connected to the electronic musical instrument.For example, the tone color can be changed by stepping in the dead band. Is done. Specifically, two types of tones that can be selected from a plurality of tones such as acoustic piano tones and organ tones are set in advance, and they are sequentially switched for each depression operation in the dead zone.
If the pedal depression amount has not returned to the initial value, the comparison with the set threshold value is repeated (step 52).

  According to such a method of operating the pedal operator, the sostenuto function is not provided for the dead zone (the "play" portion) of the sostenuto pedal in which the sostenuto function is turned on when the amount of depression exceeds the threshold value. Another function can be operably assigned. As a result, the function assigned by the operation of the pedal operator can be executed without disturbing the normal performance on the keyboard and outputting/recording as MIDI information.

  Further, when a function other than the sostenuto function is executed, by providing a detection means for detecting the number of steps in the dead zone within a certain period of time, for example, the sostenuto feeding/returning of the musical score displayed on the display unit of the externally connected tablet can be performed. In the case of a function other than the function, it is possible to control so as to page forward by pressing once and return page by pressing twice.

In the above-described example, the sostenuto pedal 1a is described as an example of the pedal operator of the control device for the pedal operator, but for the soft pedal 1b and the damper pedal 1c that have the dead zone and turn on/off the sound effect function. The same operation method may be applied.
In the case of the soft pedal 1b, the soft function of softening the sound by lowering the volume and causing the tone color change is exerted by the normal operation of the soft pedal 1b, and the function other than the soft function is exerted by the pedal operation in the dead zone.
In the case of the damper pedal 1c, the damper function for controlling the time until the sound is muted is exerted by the normal operation of the damper pedal 1c, and the functions other than the damper function are exerted by the pedal operation in the dead zone.

  Further, when the soft pedal 1b and the damper pedal 1c perform functions other than the soft function and the damper function, it is set to change the tone color by pedal operation in the dead zone of both, and when selecting a plurality of tone colors. The increment function may be performed by depressing the soft pedal 1b, and the decrement function may be performed by depressing the damper pedal 1c.

Next, another operation method of the sostenuto pedal 1a in the control device of the pedal operator will be described with reference to the flowchart of FIG.
In the case of the sostenuto pedal, the operation of depressing the pedal for a moment to turn it on, and then immediately releasing it to turn it off is an operation that cannot be performed when playing the piano. FIG. 4 shows a processing procedure (operating method) of the sostenuto pedal utilizing this characteristic, and the same initialization processing as the operating method in the case of FIG. 3 is performed by turning on the power.

As the processing of the main routine, when the sostenuto pedal 1a is depressed, the AD value decreases from the initial value (sostenuto pedal off state) according to the depression amount (step 61).
When the AD value (depression amount) of the sostenuto pedal decreases and exceeds a preset threshold value (in this example, since the AD value decreases according to the depression amount, the AD value becomes less than the threshold value) (Step 62), it is determined whether the AD value returns to the initial value in the off state within the set fixed time (step 63).

  If the AD value resulting from the pedal operation does not return to the initial value in the off state within a fixed time, it is determined that the player desires to exhibit the sostenuto function, and the sostenuto function is executed (step 64). That is, when the performer continues to operate the pedal, the sostenuto function is exerted on the musical sound within the period desired by the performer, and when the sostenuto pedal is released (step 65), the sostenuto pedal is turned off in step 61. Returns to the initial state value.

  In step 63, when the pedal operation returns to the initial value in the off state within the fixed time, it is determined that the player desires the function other than the sostenuto function, and the function other than the sostenuto function is performed (step 66). ).

  According to such a method of operating the pedal operator, when a depression amount exceeding a threshold value occurs, and when the depression amount returns to the initial value (OFF state) within a certain time, a function different from the sostenuto function is provided. Since it can be assigned operably, the assigned function can be executed without disturbing the normal performance on the keyboard and without outputting/recording as MIDI information.

  According to each control device of the pedal operator described above, in the electronic musical instrument having the function of acquiring the degree of pedal depression by detecting the amount of depression of the pedal operator, the amount of depression and the duration of depression are normally detected. In addition to the function to give the acoustic effect by operation, the function assigned separately by the operation in the dead band which is not usually used makes it possible to separate different functions that are not related to each other with a single pedal operator. It can be possible to operate.

  DESCRIPTION OF SYMBOLS 1... Pedal operator, 1a... Sostenuto pedal, 1b... Damper pedal, 1c... Soft pedal, 2... Operation detecting means, 3... A/D converter, 4... Threshold crossing judging means, 5... Pedal function executing means, 10 ... CPU, 11... ROM, 12... RAM, 13... Volume switch, 14... Operation panel, 17... Keyboard, 18... Sound source, 19... Digital signal processing circuit, 23... Tablet.

Claims (7)

For pedal operators of electronic musical instruments that exert multiple functions by pedal operation,
Operation detecting means for detecting the pedal operation,
Threshold crossing judging means for judging whether or not the pedal operation exceeds a preset threshold with respect to the depression amount,
A pedal that exerts a desired function when the pedal operation exceeds the threshold value and exerts a function other than the desired function when the pedal operation returns to the initial value in the off state without exceeding the threshold value. Function execution means,
Bei to give a,
The desired function is one of sostenuto, damper, software,
The control device for a pedal operator , wherein the function other than the desired function is a function of changing an internal parameter of the electronic musical instrument .   For pedal operators of electronic musical instruments that exert multiple functions by pedal operation,
  Operation detecting means for detecting the pedal operation,
  Threshold crossing judging means for judging whether or not the pedal operation exceeds a preset threshold with respect to the depression amount,
  A pedal that exerts a desired function when the pedal operation exceeds the threshold value and exerts a function other than the desired function when the pedal operation returns to the initial value in the off state without exceeding the threshold value. Function execution means,
Equipped with
  The desired function is one of sostenuto, damper, software,
  The function other than the desired function is a control function of an external device connected to the electronic musical instrument.
A control device for a pedal operator characterized in that 2. The control device for a pedal operator according to claim 1 , wherein the function of changing the internal parameter is any one of a tone color change, a volume change, a metronome speed change, a recording start and a reproduction start. For pedal operators that exert multiple functions by pedal operation,
Operation detecting means for detecting the pedal operation,
Threshold crossing judging means for judging whether or not the pedal operation exceeds a preset threshold with respect to the depression amount,
When the pedal operation exceeds the threshold value and the sostenuto function is exerted when the pedal operation does not return to the initial value of the off state within the set fixed time, the pedal operation exceeds the threshold value and is turned off within the fixed time. When returning to the initial value, pedal function executing means for exerting a function other than the sostenuto function,
A control device for a pedal operator, comprising: The pedal operator is a pedal of an electronic musical instrument,
The control device for a pedal operator according to claim 4 , wherein the function other than the sostenuto function is a function of changing an internal parameter of the electronic musical instrument. 6. The pedal operator control device according to claim 5 , wherein the function of changing the internal parameter is one of a tone color change, a volume change, a metronome speed change, a recording start, and a reproduction start. The pedal operator is a pedal of an electronic musical instrument,
The control device for a pedal operator according to claim 4 , wherein the function other than the sostenuto function is a control function of an external device connected to the electronic musical instrument.