JP2002297137A - Electronic musical instrument and its sound volume balance control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic musical instrument which can set similarly to settings with a slider although the constitution is inexpensive. SOLUTION: This musical instrument is equipped with a keyboard 25 which has a plurality of keys, a key depression detection part 10 (CPU) which detects the keyboard being pressed, a balance value generation part 10 (CPU) which generates a balance value according to the position of the key depression detected by the key depression detection part in specific operation mode, and a sound source 20 which generates sounds of two kinds of timbres with the sound volume balance based upon the balance value generated by the balance value generation part.

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 and a method for controlling the volume balance of an electronic musical instrument, and more particularly to a technique for controlling the volume balance of a sound having a plurality of timbres.

[0002]

2. Description of the Related Art Conventionally, an electronic musical instrument having a slider on an operation panel has been known. This slider is, for example, 2
It is used to set the volume balance between two tones when using a dual function that generates two tones and a split function that generates musical tones with different tones in each key range by dividing the keyboard into two.

This slider is composed of a guide and a slider sliding on the guide, and outputs a signal corresponding to the position of the slider on the guide. The processor incorporated in the electronic musical instrument uses the dual function or split function described above in accordance with the signal from the slider.
Set the volume balance of two tones.

[0004]

Among the conventional electronic musical instruments, most of the high-order electronic musical instruments have a slider, and various settings can be intuitively and quickly performed using the slider. By the way, in recent years, there is a demand that even a low-order model wants to have the same function as a high-order model. However, many low-end models do not have a slider, and there is a problem that a function that requires setting by a slider, such as a dual function or a split function, cannot be mounted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has an electronic musical instrument capable of performing the same setting as that of a slider despite its inexpensive configuration, and a volume balance control method thereof. To provide.

[0006]

In order to achieve the above object, an electronic musical instrument according to a first aspect of the present invention has a keyboard having a plurality of keys, and a key press detecting section for detecting key presses on the keyboard. And a balance value generation unit that generates a balance value based on the position of the key pressed detected by the key press detection unit in a predetermined operation mode, and when a key press is detected by the key press detection unit, A sound source that generates two types of sounds with a volume balance based on the balance value generated by the balance value generation unit;
And

[0007] In the electronic musical instrument according to the first aspect, the keyboard is on the left side of between two predetermined keys and the left keyboard to which the first tone is assigned, and on the right side of between the predetermined two keys. A right keyboard to which a second timbre is assigned, wherein the balance value generation unit is configured to determine a left balance value for the left keyboard and a right keyboard based on a key position detected by the key press detection unit in a predetermined operation mode. A right balance value for the sound source, the sound source generates the sound of the first timbre at a volume according to the left balance value when a key depression of the left keyboard is detected by the key depression detection unit, The second key tone may be generated at a volume based on the right balance value when a key press of the right keyboard is detected by the key press detection unit.

Further, in the electronic musical instrument according to the first aspect, the balance value generation unit may be configured to determine the left key for the left keyboard based on a key position detected by the key press detection unit in a predetermined operation mode. Generating a balance value and a right-side balance value for a right-side keyboard, wherein the sound source has a first tone whose volume is controlled based on the left-side balance value when a key-depression is detected by the key-depression detection unit. And a second tone whose volume is controlled based on the right balance value.

Further, a volume balance control method for an electronic musical instrument according to a second aspect of the present invention detects a key depression of a key having a plurality of keys for the same purpose as described above, and performs the detection in a predetermined operation mode. A balance value is generated based on the position of the depressed key, and two types of sounds are generated in a volume balance based on the generated balance value according to the depressing of the keyboard. .

[0010] In the volume balance control method for an electronic musical instrument according to the second aspect, the keyboard may be a left keyboard to the left of a predetermined two keys and to which a first tone is assigned;
Generating a balance value on the right side of the predetermined two keys, and generating the balance value based on the detected key position in a predetermined operation mode. A left balance value for the right keyboard and a right balance value for the right keyboard are generated, and when the depression of the left keyboard is detected, the first tone is generated at a volume corresponding to the left balance value, and When the key detection unit detects a key depression of the right keyboard, the second tone can be generated at a volume based on the right balance value.

In the method for controlling the volume balance of an electronic musical instrument according to the second aspect, the step of generating the balance value may include the step of generating the balance value based on the detected key position in a predetermined operation mode. A left balance value and a right balance value for the right keyboard are generated, and when a key is detected, a first tone whose volume is controlled based on the left balance value and a right balance value based on the right balance value are detected. And the second tone of which the volume is controlled is generated in a superimposed manner.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electronic musical instrument according to an embodiment of the present invention and a volume balance control method thereof will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an electronic musical instrument according to an embodiment of the present invention. The electronic musical instrument includes a central processing unit (hereinafter, referred to as a “CPU”) 10, a program memory 11,
It comprises a work memory 12, a key scan circuit 13, a panel scan circuit 14, a panel display circuit 15, a pedal scan circuit 16, a MIDI interface circuit 17, and a tone signal generator 18.

The CPU 10 controls the entire electronic musical instrument according to a control program stored in the program memory 11. The key press detection unit and the balance value generation unit according to the present invention include:
This is realized by the processing of the CPU 10. This CP
The contents of the control by U10 will be described later in detail with reference to a flowchart.

The program memory 11 can be composed of, for example, a read only memory (ROM). The program memory 11 includes a control program area 11A, a tone color parameter area 11B, and a data area 11C. The control program area 11A stores the above-described control program.

The timbre parameter area 11B stores a plurality of timbre parameters respectively corresponding to a plurality of timbres.
Each tone color parameter is composed of data for determining a tone color, for example, a waveform address, frequency data, envelope data, a filter coefficient, and the like. Data area 1
1C stores various fixed data referred to by the CPU 10. The fixed data includes a dual / split balance table (described in detail below) related to the features of the present invention.

The work memory 12 can be composed of, for example, a random access memory (RAM). The work memory 12 temporarily stores various data used for controlling the electronic musical instrument. This work memory 12
Defines registers, counters, flags, and the like. The main ones of these will be described below, and the rest will be described as they appear below.

(1) Tone number register: Stores the tone number in the normal operation mode. (2) First timbre register: Stores the timbre number of the first timbre in the dual mode and the split mode. (3) Second timbre register: Stores the timbre number of the second timbre in dual mode and split mode. (4) Volume register: Stores the overall volume of the electronic musical instrument. (5) System setting flag: Indicates that the system is operating in the system setting mode. (6) Split flag: indicates that the device is operating in the split mode. (7) Dual flag: Indicates that the device is operating in the dual mode. (8) Left balance register: Stores the left balance value set in the system setting mode. (9) Right balance register: Stores the right balance value set in the system setting mode.

A keyboard 25 is connected to the key scan circuit 13. The keyboard 25 has, for example, 88 keys, and is used to instruct sound generation and mute in a normal operation mode. In the dual mode and the split mode, the keyboard 25 is used to realize a function equivalent to a slider (details will be described later). This keyboard 2
In the split mode 5, a split point is provided between the key number “44” and the key number “45”, the key numbers “1” to “44” are on the left keyboard, and the key numbers “45” to “8”.
8 "is called the right keyboard.

The key scan circuit 13 scans each key on the keyboard 25 in response to a command from the CPU 10. Then, key data is created based on a signal indicating the on / off state of each key obtained by this scan. The key data consists of a bit string in which each key corresponds to one bit,
In each bit, “1” indicates that the key is being pressed, and “0” indicates that the key is being released. The created key data is sent to the CPU 10 via the system bus 30, and is used to determine whether a keyboard event has occurred.

A panel switch 26 is connected to the panel scan circuit 14. The panel switch 26 is shown in FIG.
, The volume switch 40, the tone switch 41,
It comprises a split switch 42, a dual switch 43 and a setting switch 44. In addition, various switches other than those described above are provided as panel switches of an actual electronic musical instrument, but are omitted in this specification for the sake of simplicity.

The volume switch 40 is composed of, for example, a slide-type volume, and is used to control the overall volume of the electronic musical instrument. This volume switch 4
The volume value set at 0 is stored in the volume register.

The tone switch 41 includes, for example, a first piano switch (Piano1) 50 and a second piano switch (Piano2).
51, an electronic piano switch (E.Piano) 52, an organ switch (Organ) 53, and a string switch (Strin
g) 54. These switches are used to specify the timbres of the first piano, the second piano, the electronic piano, the organ, and the string, respectively. The number and types of the switches constituting the tone switch are not limited to the above, and are arbitrary.

The split switch 42 is used to shift the electronic musical instrument to a split mode. The dual switch 43 is used to shift the electronic musical instrument to the dual mode. In this electronic musical instrument, the split mode and the dual mode are controlled so as not to exist at the same time. The setting switch 44 is used to shift the electronic musical instrument to the system setting mode.

The split switch 42, the dual switch 43, the setting switch 44, and the first piano switch 5
0, second piano switch 51, electronic piano switch 5
2. Organ switch 53 and string switch 54
Each have an LED. Each LED is repeatedly turned on and off each time each switch is pressed.

The panel scan circuit 14 scans each switch of the panel switch 26 according to a command from the CPU 10. Then, based on a signal indicating the on / off state of each switch obtained by this scan, panel data in which each switch corresponds to 1 bit is created.
Each bit indicates ON when “1” and OFF when “0”.
This panel data is sent to the CPU via the system bus 30.
10 and used to determine if a panel event has occurred.

A display 27 is connected to the panel display circuit 15. The display 27 includes the split switch 42, the dual switch 43, the setting switch 44,
The LEDs of the piano switch 50, the second piano switch 51, the electronic piano switch 52, the organ switch 53, and the string switch 54 are included. Note that, in addition to the above, the display of the actual electronic musical instrument is provided with an LCD for displaying various messages and LEDs corresponding to various switches, but is omitted in this specification for simplicity of description. .

The panel display circuit 15 generates a drive signal based on the display control data sent from the CPU 10,
Send to display 27. Thereby, each LED provided in the split switch 42, the dual switch 43, the setting switch 44, the first piano switch 50, the second piano switch 51, the electronic piano switch 52, the organ switch 53, and the string switch 54 is turned on or off. Is done.

A pedal 28 is connected to the pedal scan circuit 16. The pedal 28 includes a detector that detects the amount of depression. The detector can be composed of, for example, a rotary encoder that outputs data corresponding to the amount of depression.

The pedal scan circuit 16 scans a detector provided on the pedal 28 in response to a command from the CPU 10. Then, pedal position data is created based on a signal indicating the amount of depression obtained by this scan. The pedal position data is sent to the CPU 10 via the system bus 30 and is used to determine whether a pedal event has occurred.

The MIDI interface circuit 17 receives MIDI data from the outside, converts musical sound data generated inside the electronic musical instrument into MIDI data, and transmits the MIDI data to the outside. This MIDI interface circuit 17
Is received by the CPU 10 via the system bus 30 and is used to determine whether a MIDI input event has occurred.

The tone signal generator 18 corresponds to the tone generator of the present invention, and generates a digital tone signal in response to an instruction from the CPU 10. A waveform memory 20 and a D / A converter (DAC) 21 are connected to the tone signal generator 18.

The tone signal generator 18 has a waveform memory 20
A digital tone signal is generated based on the waveform data stored in the D / A converter 21 and sent to a D / A converter (DAC) 21. D /
The A converter 21 converts the received digital tone signal into an analog tone signal and sends it to the amplifier 22. Amplifier 22
Amplifies the signal from the D / A converter 21 and
Send to 3. Thereby, a musical sound is generated from the speaker 23.

Next, an example of the dual / split balance table stored in the data area 11C of the program memory 11 will be described with reference to FIG. This dual / split balance table has a key depression position (X
The left balance value and the right balance value (Y-axis) (hereinafter, simply referred to as “balance value”) are stored for each of the three axes. The balance value corresponding to each key depression position is a value in the range of 0 to 7FH (the last digit "H" indicates a hexadecimal number).

In the example shown in FIG. 3, the left balance value is
As shown by the solid line, a constant value of 7FH is used for 1 to 44 keys.
From the 44th key to the 88th key, it gradually decreases from 7FH to 00H. As shown by the broken line, the right side balance value gradually increases from 00H to 1 to 44 keys and is 7
FH, and the constant value is 7FH from 44 keys to 88 keys.

Accordingly, when the key with the key number "1" is pressed, the dual / split balance table outputs 7FH as the left balance value and 00H as the right balance value, and the key with the key number "44" is output. When the key is pressed, 7FH is output as the left balance value and the right balance value, and when the key with the key number “88” is pressed, 00H is output as the left balance value and 7FH is output as the right balance value.

Next, the operation of setting the sound volume balance in the electronic musical instrument configured as described above will be described.

First, the electronic musical instrument is shifted to the system setting mode. This is performed by the operator pressing the setting switch 44 on the panel switch 26. When the setting switch 44 is pressed, the LED of the setting switch 44 lights up, indicating that the system setting mode has been entered.
In this system setting mode, the first piano switch 5
0, second piano switch 51, electronic piano switch 52
, And one of the organ switches 53 is turned on to display the currently selected setting item. The setting items can be determined, for example, as follows.

First piano switch 50: Local on /
Off setting Second piano switch 51: MIDI channel setting Electronic piano switch 52: Dual / split balance setting Organ switch 53: Tone setting

In this system setting mode, when the electronic piano switch 52 is pressed, its LED is turned on, and the dual / split balance setting item is selected. As a result, the electronic musical instrument is set in a state where the dual / split balance can be set.

In this state, when the operator presses a key on the keyboard 25 at a position where the user wants to set the dual / split balance, the left balance value corresponding to the pressed key is read from the dual / split balance table. Is set in the left balance register. The right balance value corresponding to the pressed key is read from the dual / split balance table and set in the right balance register. As a result, a dual / split balance is set according to the position of the pressed key. As described above, the operation of pressing the key on the keyboard 25 has the same effect as the operation of the slider of the conventional slider, as conceptually shown in FIG.

When the setting of the dual / split balance is completed, when the operator presses the setting switch 44, the LED of the setting switch 44 turns off, and the system setting mode ends.

Next, the operation of the electronic musical instrument configured as described above will be described with reference to the flowcharts shown in FIGS.

(A) Main Processing FIG. 5 is a flowchart showing main processing of the electronic musical instrument according to the embodiment of the present invention. This main processing routine is started when the power is turned on. When the power is turned on,
First, the CPU 10 is initialized (step S1).
0). In this initialization, hardware inside the CPU 10 is set to an initial state.

Next, the work memory 12 is initialized (step S11). In this initialization, initial values are set in registers, counters, flags, and the like defined in the work memory 12.

Next, panel event processing is performed (step S12). In this panel event process, a process corresponding to the operation of each switch on the panel switch 26 is performed. The details of the panel event process will be described later.

Next, a keyboard event process is performed (step S13). In this keyboard event processing, sound generation processing according to key depression, mute processing according to key release, and dual /
Processing for setting the split balance is performed. The details of the keyboard event process will be described later.

Next, pedal event processing is performed (step S14). In this pedal event processing, C
The PU 10 takes in pedal position data from the pedal 28. Then, the CPU 10 checks whether or not an event of the pedal 28 has occurred based on the pedal position data. Here, when it is determined that an event of the pedal 28 has occurred, a process corresponding to the event is executed. For example, when the pedal 28 is an expression pedal, a sound volume changing process is executed so that the sound volume is adjusted according to the depressed position.

Next, MIDI input event processing is performed (step S15). In this MIDI input event processing, the CPU 10 executes the MIDI interface circuit 1
In step 7, it is checked whether MIDI data has been received. Then, when it is determined that the MIDI data has been received, a process corresponding to the MIDI data is executed. For example, when it is determined that note-on MIDI data has been received, a sound generation process is executed. Next, other processing is performed (step S16). In this "other processing", for example, a sequencer processing for recording / reproducing a musical tone is performed.

Thereafter, the sequence returns to step S12, and the same processing is repeated thereafter. In this way,
When events of the keyboard 25, the panel switch 26, the pedal 28, and the MIDI input occur in the process of repeatedly executing steps S12 to S16, processing corresponding to the events is performed. Thereby, various functions as an electronic musical instrument are exhibited.

(B) Panel Event Processing Next, the panel event processing will be described with reference to the flowchart shown in FIG. In this panel event process, first, the presence or absence of a panel event is checked (step S20). This is performed based on panel data obtained from the panel scan circuit 14. Here, if it is determined that no panel switch event has occurred, the sequence returns to the main processing.

On the other hand, if it is determined that an event of the panel switch has occurred, then it is checked whether or not the event is an event of the setting switch 44 (step S21). Here, when it is determined that the event is the event of the setting switch 44, the system setting flag is inverted (step S22), and then the sequence returns to the main processing.

As a result of this inversion, when the system setting flag is set to “1”, the LED of the setting switch 44
Is turned on, and turned off when cleared to "0".
When the system setting flag is set to “1”, the dual / split balance is set in a keyboard event processing routine described later.

If it is determined in step S21 that the event is not the event of the setting switch 44, then it is checked whether or not the event is the event of the split switch 42 (step S23). Here, the split switch 42
Is determined, the split flag is inverted (step S24), and then the sequence returns to the main process.

As a result of this inversion, when the split flag is set to "1", the LED of the split switch 42 is turned on, and when cleared to "0", it is turned off. When the dual flag is set to “1”, the split flag is not set to “1”. As a result, control is performed so that the split flag and the dual flag are not set to “1” at the same time. By setting the split flag to “1”, a sound is generated by the split function in a keyboard event processing routine described later.

If it is determined in step S23 that the event is not the event of the split switch 42, then it is checked whether or not the event is the event of the dual switch 43 (step S25). Here, dual switch 4
If it is determined that the event is event No. 3, the dual flag is inverted (step S26), and the sequence returns to the main process.

As a result of this inversion, the dual flag becomes "1".
Is set to ON, the LED of the dual switch 43 is turned on, and when cleared to "0", the LED is turned off. When the split flag is set to “1”, the dual flag is not set to “1”. As a result, control is performed so that the split flag and the dual flag are not set to “1” at the same time. When the dual flag is set to "1", sound is generated by the dual function in a keyboard event processing routine described later.

In step S25, the dual switch 4
If it is determined that the event is not the event No. 3, it is checked whether or not the event is the tone switch 41 (step S27). Here, if it is determined that the event is the tone switch 41, a tone change process is performed (step S28), and then the sequence returns to the main process.

In the tone color changing process, in the normal operation mode, the tone color number corresponding to the pressed switch of the tone color switches 41 is stored in the tone color register. In the case of the dual mode or the split mode, the tone number corresponding to the pressed switch of the tone switches 41 is alternately stored in the first tone register and the second tone register. Accordingly, the tone number corresponding to the switch pressed first is stored in the first tone register, the tone number corresponding to the pressed switch is stored in the second tone register, and the tone corresponding to the next pressed switch is further stored. The number is stored in the first tone color register and so on.

If it is determined in step S27 that the event is not the event of the tone switch 41, then it is checked whether or not the event is the volume switch 40 (step S29). Here, when it is determined that the event is the volume switch 40, a volume change process is performed (step S30). In the volume change process, the value set by the volume switch 40 is stored in the volume register as a volume value. Thereafter, the sequence returns to the main processing.

If it is determined in step S29 that the event is not the event of the volume switch 40, then the other switches are processed (step S31). In this “processing of other switches”, processing for events of switches other than those described above is performed. Thereafter, the sequence returns to the main processing.

(C) Keyboard Event Processing Next, the keyboard event processing will be described with reference to the flowcharts shown in FIGS. In this keyboard event process, first, the presence or absence of a keyboard event is checked (step S40). This is performed based on the key data received from the key scan circuit 13. Here, if it is determined that no keyboard event has occurred, the sequence returns to the main processing.

On the other hand, if it is determined that a keyboard event has occurred, then it is checked whether the event is a key press event (step S41). here,
If it is determined that the event is not a key pressing event, a mute process is performed (step S42). This silencing process is performed by sending predetermined data to the tone signal generator 18.

If it is determined in step S21 that the event is a key press event, then it is checked whether or not the electronic musical instrument is currently set to the system setting mode (step S43). This is done by examining the system setting flags. Here, if it is determined that the mode is set to the system setting mode, then,
It is checked whether the dual / split balance can be set (step S44). Here, when it is determined that the dual / split balance can be set, a balance value setting process is performed (step S45).

In this balance value setting process, as described above, the left balance value corresponding to the pressed key is read from the dual / split balance table and set in the left balance register. The right balance value corresponding to the pressed key is read from the dual / split balance table and set in the right balance register. As a result, a dual / split balance is set according to the position of the pressed key.

If it is determined in step S44 that the tone of the electronic piano has not been set, other processing is performed (step S46). This "other processing"
Now, the other processing performed in the system setting mode, namely,
Local on / off setting processing, MIDI channel setting processing, and tone setting processing are performed.

If it is determined in step S43 that the current mode is not the system setting mode, the normal sound generation processing is performed.
A sound generation process for realizing the split function and a sound generation process for realizing the dual function are performed.

That is, first, it is checked whether the mode is the split mode (step S47). This is done by examining the split flag. Here, if it is determined that the current mode is the split mode, then it is checked whether or not a key on the left keyboard is pressed (step S4).
8).

If it is determined that the keyboard is the left keyboard, the timbre parameters of the first timbre are set (step S49). That is, the CPU 10 takes out the timbre parameter corresponding to the first timbre number stored in the first timbre register from the timbre parameter area 11B of the program memory 11, and sets it in the tone signal generator 18.

Next, the volume of the first tone is set (step S50). That is, the CPU 10 multiplies the left balance value stored in the left balance register by the volume value stored in the volume register, and uses the result of the multiplication as the volume value of the actually generated sound. It is set on the device 18.

Next, a tone generation process is performed (step S).
51). That is, the CPU 10 instructs the tone signal generator 18 to start tone signal generation. As a result, a sound by the split function, that is, a sound having a pitch corresponding to the pressed key of the left keyboard, a first tone color, and a volume corresponding to the left balance value is generated. Thereafter, the sequence returns to the main processing.

If it is determined in step S48 that the keyboard is not the left keyboard, it is recognized that the keyboard is the right keyboard, and the second keyboard is recognized.
The timbre parameters of the timbre are set (step S5).
2). That is, the CPU 10 takes out the timbre parameter corresponding to the second timbre number stored in the second timbre register from the timbre parameter area 11B of the program memory 11, and sets it in the tone signal generator 18.

Next, the volume of the second tone is set (step S53). That is, the CPU 10 multiplies the right balance value stored in the right balance register by the volume value stored in the volume register, and uses the result of the multiplication as the volume value of the actually generated sound. It is set on the device 18.

Next, a sound generation process is performed (step S).
51). As a result, a sound generated by the split function, that is, a sound having a pitch corresponding to the pressed key of the right keyboard, a second timbre, and a volume corresponding to the right balance value is generated. Thereafter, the sequence returns to the main processing.

If it is determined in step S47 that the mode is not the split mode, then it is checked whether the mode is the dual mode (step S54). This is done by examining the dual flags. If it is determined that the mode is the dual mode, the timbre parameter of the first timbre is set (step S5).
5). This process is the same as the process in step S49.

Next, the volume of the first tone color is set (step S56). This process is the same as the process in step S50. Next, the timbre parameters of the second timbre are set (step S57). This process is the same as the process in step S52. Next, the volume of the second timbre is set (step S58). This process
This is the same as the process in step S53.

Next, a tone generation process is performed (step S).
51). With this, the sound by dual function, that is,
A first tone having a pitch corresponding to the pressed key of the keyboard 25, a first tone, and a volume corresponding to the left balance value, and a pitch corresponding to the pressed key of the keyboard 25, a second tone, and the right side A second sound having a volume corresponding to the balance value is simultaneously generated. Thereafter, the sequence returns to the main processing.

If it is determined in step S54 that the mode is not the dual mode, the timbre parameters are set (step S59). That is, the CPU 10 stores the timbre parameter corresponding to the timbre number stored in the timbre register in the timbre parameter area 11B of the program memory 11.
And set it in the tone signal generator 18. Next, the sound volume is set (step S60). That is,
The CPU 10 sets the volume value stored in the volume register in the tone signal generator 18.

Next, a tone generation process is performed (step S).
51). Thus, the normal tone, that is, the pitch corresponding to the key pressed on the keyboard 25, the tone corresponding to the tone number stored in the tone register, and the volume corresponding to the volume value stored in the volume register are set. A sound is generated.
Thereafter, the sequence returns to the main processing.

As described above, according to this embodiment, the same function as the slider can be exhibited by operating the keyboard in the system setting mode, so that the slider is unnecessary. As a result, the dual / split balance required for the dual function and the split function, etc., which were conventionally not provided in the high-end model, can be set without using the slider. It can also be installed on models.

[0081]

As described in detail above, according to the present invention,
It is possible to provide an electronic musical instrument capable of performing the same setting as the setting using the slider despite its inexpensive configuration, and a volume balance control method thereof.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing an example of a panel switch mounted on the electronic musical instrument shown in FIG.

FIG. 3 is a diagram showing an example of a dual / split balance table stored in a data area of a program memory mounted on the electronic musical instrument shown in FIG.

FIG. 4 shows an electronic musical instrument according to an embodiment of the present invention.
It is a figure for explaining signs that operation of pressing a key of a keyboard corresponds to operation of a slider of a slider.

FIG. 5 is a flowchart showing main processing of the electronic musical instrument according to the embodiment of the present invention.

FIG. 6 is a flowchart showing panel event processing of the electronic musical instrument according to the embodiment of the present invention.

FIG. 7 is a flowchart showing a keyboard event process (1) of the electronic musical instrument according to the embodiment of the present invention.

FIG. 8 is a flowchart showing a keyboard event process (part 2) of the electronic musical instrument according to the embodiment of the present invention.

[Explanation of symbols]

 10 CPU 11 Program Memory 12 Work Memory 13 Key Scan Circuit 14 Panel Scan Circuit 15 Panel Display Circuit 16 Pedal Scan Circuit 17 MIDI Interface Circuit 18 Musical Signal Generator 20 Waveform Memory 21 D / A Converter 22 Amplifier 23 Speaker 25 Keyboard 26 Panel Switch 27 indicator 28 pedal 30 system bus 40 volume switch 41 tone switch 42 split switch 43 dual switch 44 setting switch 50 first piano switch 51 second piano switch 52 electronic piano switch 53 organ switch 54 string switch

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D378 DD13 DD14 DE27 XX15

Claims (6)

[Claims] A key having a plurality of keys; a key-press detector for detecting key-depression of the keyboard; and a balance value based on a key-press position detected by the key-press detector in a predetermined operation mode. And a sound source that generates two types of sounds with a volume balance based on the balance value generated by the balance value generation unit when a key press is detected by the key press detection unit. , And an electronic musical instrument with. 2. The keyboard includes a left keyboard to which a first tone is assigned to a left side of a predetermined two keys, and a right keyboard to which a second tone is assigned to a right of the predetermined two keys. The balance value generation unit generates a left balance value for the left keyboard and a right balance value for the right keyboard based on the position of the key detected by the key press detection unit in a predetermined operation mode, The sound source emits the first tone at a volume corresponding to the left balance value when the key depression of the left keyboard is detected by the key depression detection unit, and the key depression detection unit depresses the right keyboard. 2. The electronic musical instrument according to claim 1, wherein when the key is detected, the second musical tone is generated at a volume based on the right balance value. 3. The balance value generation section calculates a left balance value for the left keyboard and a right balance value for the right keyboard based on a position of a key detected by the key press detection section in a predetermined operation mode. The sound source generates a first tone whose volume is controlled based on the left balance value and a volume controlled based on the right balance value when a key press is detected by the key press detection unit. The electronic musical instrument according to claim 1, wherein the electronic musical instrument is generated by superimposing a sound of the selected second timbre. 4. A key depression of a key having a plurality of keys is detected, and a balance value is generated based on the detected position of the key depression in a predetermined operation mode. A volume balance control method for an electronic musical instrument, wherein two types of sounds are generated with a volume balance based on a generated balance value. 5. The keyboard includes a left keyboard to which a first tone is assigned to a left side of a predetermined two keys, and a right keyboard to which a second tone is assigned to a right side of the predetermined two keys. The step of generating the balance value comprises generating a left balance value for the left keyboard and a right balance value for the right keyboard based on the position of the detected key in a predetermined operation mode, Generates a tone of the first tone at a volume corresponding to the left-side balance value when a key-depression is detected, and sets a volume based on the right-side balance value when a key-depression of the right keyboard is detected by the key-depression detection unit. The volume balance control method for an electronic musical instrument according to claim 4, wherein the second tone is generated in the electronic musical instrument. 6. The step of generating the balance value comprises:
In a predetermined operation mode, a left balance value for the left keyboard and a right balance value for the right keyboard are generated based on the detected key position, and when a key press is detected, the left balance value is determined based on the left balance value. 5. The volume balance control method for an electronic musical instrument according to claim 4, wherein a sound of the first timbre whose volume is controlled by the controller and a sound of a second timbre whose volume is controlled based on the right balance value are generated in an overlapping manner. 6. .