JP2003114675A - Parameter setting device of electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parameter setting device of an electronic musical instrument which can set parameters through easy operation. SOLUTION: This device is equipped with a function selecting operation element 130 (133, 139) for selecting a function, an increase/decrease operation element 130 (135) for indicating an increase or decrease in parameter value, and a control part 10 which varies the tempo of sound generated according to the function selected by the function selecting operation element according to the parameter value indicated by the increase/decrease operation element when the function selecting operation element is not depressed and varies the sound volume of the sound to be generated according to the function selected by the function selecting operation element according to the parameter value indicated by the increase/decrease operation element when the function selecting operation element is depressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parameter setting device for an electronic musical instrument, and more particularly to a technique for setting parameters by sharing one operator.

[0002]

2. Description of the Related Art Conventionally, various parameters are set in an electronic musical instrument prior to or during operation of the electronic musical instrument,
Or, the setting is being changed. Hereinafter, a case of changing the volume parameter will be described as an example. For example, when it is desired to change the volume of an automatic accompaniment sound in an electronic musical instrument having an automatic accompaniment function, the volume parameter is set by operating the volume provided for the automatic accompaniment sound. When it is desired to change the volume of the metronome sound in the electronic musical instrument having the metronome function, the volume parameter is set by operating the volume provided for the metronome sound.

[0003]

As described above, conventionally, an electronic musical instrument is equipped with an automatic accompaniment function or a metronome function, and for example, in order to adjust the volume, a dedicated volume or slider is provided for each function. Manipulators are provided. As a result, the cost of the operator is high, and many functions cannot be installed in a model that requires low cost.

Recently, since display devices such as 7-segment LED and LCD have become cheaper, the display devices have come to be mounted on relatively low-cost models. Therefore, there has been developed a parameter setting device configured to set various parameters by using this display device and a value switch commonly used for a plurality of functions such as an UP / DOWN switch and a dial. In this parameter setting device, it is confirmed on the display device that the parameter setting mode for each function has been entered, and the parameter is set for each function by increasing or decreasing the parameter value with the value switch.

However, in such a conventional parameter setting device, since the value switch is commonly used for a plurality of purposes, the operation of setting the parameter becomes complicated, and it is difficult for a beginner to understand. .

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a parameter setting device for an electronic musical instrument that can set parameters by a simple operation.

[0007]

In order to achieve the above object, a parameter setting device for an electronic musical instrument according to the present invention includes a function selection operator for selecting a function and an increase / decrease operator for instructing increase / decrease of a parameter value. When the increase / decrease operator is operated, the tempo of the sound generated based on the function selected by the function selecting operator is instructed by the increasing / decreasing operator unless the function selecting operator is being pressed. Parameter value, the volume of sound generated based on the function selected by the function selecting operator is changed according to the parameter value instructed by the increasing or decreasing operator if the function selecting operator is being pressed. And a control unit for controlling.

According to the parameter setting device for an electronic musical instrument of the present invention, the volume is changed when the increase / decrease operator is operated while the function selecting operator is kept pressed, and the increase / decrease operation is performed without pressing the function selecting operator. You can change the tempo by operating the child. Therefore, even when the increase / decrease operator is commonly used for a plurality of purposes, it is not necessary to perform a complicated operation to set the parameter, and the parameter can be set by a simple operation.

In this parameter setting device for an electronic musical instrument, the function selected by the function selecting operator may be an automatic accompaniment function for generating an automatic accompaniment sound. in this case,
Further comprising a master volume operator, which controls the overall volume,
The control unit may be configured to change the volume of the automatic accompaniment sound set by the master volume operator according to the parameter value instructed by the increase / decrease operator.

Further, in this electronic musical instrument parameter setting device, the function selected by the function selecting operator may be a metronome function for generating a metronome sound. In this case, a master volume operator for setting the overall volume is further provided, and the control unit sets the volume of the metronome sound set by the master volume operator according to a parameter value instructed by the increase / decrease operator. Can be configured to change.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a parameter setting device for an electronic musical instrument according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an electronic musical instrument to which the parameter setting device according to the present invention is applied.
The electronic musical instruments are interconnected by a bus 30,
It is composed of a central processing unit (hereinafter referred to as "CPU") 10, a program memory 11, a work memory 12, a panel scan circuit 13, a display device 14, a key scan circuit 15 and a musical tone generating section 16. The bus 30 is composed of signal lines for transmitting, for example, address signals, data signals, control signals, etc., and is used for transmitting / receiving data between the above-mentioned respective constituent elements.

The CPU 10 executes processing for realizing various functions mounted on the electronic musical instrument according to a control program stored in the program memory 11. Details of the processing executed by the CPU 10 will be described later in detail with reference to the flowchart.

The program memory 11 is composed of, for example, a read only memory (hereinafter referred to as "ROM"). The program memory 11 stores the above-described control program, various fixed data used by the CPU 10, tone color parameters for designating tone colors, and the like. The timbre parameter is provided for each of a plurality of musical ranges for each of a plurality of musical instrument sounds, for example. Each timbre parameter is composed of a waveform address, frequency data, envelope data, filter coefficient and the like.

The work memory 12 is composed of, for example, a random access memory (hereinafter referred to as "RAM"). The work memory 12 temporarily stores various data processed by the CPU 10. The work memory 12 is provided with, for example, a table, a buffer, a register, a counter, a flag and the like. These details will be described below as needed.

A large number of switches and LEDs mounted on the operation panel 130 are connected to the panel scan circuit 13. The display device 14 is also mounted on the operation panel 130.

As shown in FIG. 2, on the operation panel 130, in addition to the display device 14, a master volume (MASTER V
OLUME) 131, demo switch (DEMO) 132, automatic accompaniment switch (ACC) 133, tone color selection switch 134,
Value switch (VALUE) 135, effect switch (EFFECTS) 136, reverb switch (REVERB) 1
37, split switch (SPLIT) 138, metronome switch (METRONOME) 139, play / stop switch (PLAY / STOP) 140, record switch (RE
C) 141, transpose switch (TRANSPOSE) 14
2 etc. are installed.

Of these switches, the demo switch 1
32, automatic accompaniment switch 133, tone color selection switch 13
4, effect switch 136, reverb switch 13
7, each of the split switch 138, the metronome switch 139, the play / stop switch 140, the record switch 141, and the transpose switch 142 is provided with an LED, and is configured to be turned on when turned on and turned off when turned off. .

The master volume 131 corresponds to the master volume operator of the present invention. This master volume 131
Consists of a slider, which controls the overall volume of the sound produced by this electronic musical instrument. In this master volume 131, for example, “0” (minimum volume) to “127”
Generate a value in the (maximum volume) range. The value generated by the master volume 131 is stored in the master volume register (not shown) provided in the work memory 12.

The demo switch 132 is used to start and stop the automatic performance of the demonstration music built in this electronic musical instrument.

The automatic accompaniment switch 133 corresponds to the function selection operator of the present invention. This automatic accompaniment switch 133
Is used to instruct the start and stop of the generation of the automatic accompaniment sound.

The tone color selection switch 134 is composed of a plurality of switches and is used to select a tone color produced by this electronic musical instrument. In this embodiment, piano 1 (PIANO1), piano 2 (PIANO2), electric piano (E.PIANO), organ (ORGAN), string (STRING), bass (BASS), pops (POP), ballad (BALLAD) , Rock (ROCK), jazz (JAZZ), Latin (LATIN) and waltz (WALTS) tones can be selected.

The value switch 135 corresponds to the increase / decrease operator of the present invention and is commonly used in a plurality of operation modes. The value switch 135 includes an up switch (UP) 135a and a down switch (DOWN) 135.
b) and a so-called UP / DOWN switch. The up switch 135a is used for the work memory 12
The value stored in the value register (not shown) provided in the (1) is incremented (+1), and the down switch 135b is used to decrement (-1) the value. This value register contains "0" to "1".
A value in the range of "27" can be set.

The value switch 135 is usually
It is used to increase or decrease the tempo of the automatic accompaniment if the automatic accompaniment is specified, and to increase or decrease the tempo of the metronome sound if the metronome is specified. As the value switch of the present invention, instead of the UP / DOWN switch, various devices such as dials and ten keys that can instruct the increase and decrease of the value can be used.

The effect switch 136 is used to add various effects to the sound generated by this electronic musical instrument. The reverb switch 137 is used to add various reverbs to the sound generated by this electronic musical instrument. The split switch 138 is for the keyboard 1 described later.
Specifies whether to use 50 in split mode. Here, the split mode is a mode in which the low frequency side of the keyboard 150 is used as a chord designating key and the high frequency side is used as a melody playing key.

The metronome switch 139 corresponds to the function selection operator of the present invention. The metronome switch 139 is used to instruct start and stop of generation of a metronome sound.

The play / stop switch 140 and the record switch 141 have a recorder function (also called a sequencer function) mounted on this electronic musical instrument.
Used to control. The play / stop switch 140 controls reproduction and stop of a performance based on performance data recorded in a sequence memory (not shown) of this electronic musical instrument. Further, the record switch 141 is used for instructing to start recording the performance data generated by operating the keyboard 150 in the sequence memory. The transpose switch 142 is used to raise or lower the pitch of the sound generated by operating the keyboard 150 in units of one octave.

The display device 14 is composed of, for example, an LCD device. The display device 14 is used to display various messages and the status of the electronic musical instrument. As the display device 14, a display device such as a CRT display device and a plasma display device capable of displaying characters, numbers, figures and the like can be used in addition to the LCD device.

Referring to FIG. 1, panel scan circuit 13
Generates panel data based on a signal from a switch mounted on the operation panel 130 and sends the panel data to the CPU 10. This panel data is made up of a bit string in which each switch is associated with one bit. The bit corresponding to the switch turned on is "1", and the bit corresponding to the switch turned off is "0". Are set respectively. The CPU 10 executes various processes according to the operation of the switch on the operation panel 130 based on the panel data.

Further, the panel scan circuit 13 is a CPU
The display data received from 10 is sent to the LED provided on the switch mounted on the operation panel 130. As a result, turning on and off of the LED provided on the switch is controlled, and the LED functions as an indicator.

A keyboard 150 is connected to the key scan circuit 15. The keyboard 150 has a plurality of keys for instructing sounding / silence. The keyboard 150 employs a two-contact type key that has two key switches that open and close in conjunction with key depression or key release, and that open and close with different pressing depths.

The key scan circuit 15 detects the key press or key release state of each key on the keyboard 150 and the strength of the key touch.
That is, the key scan circuit 15 generates key data indicating a key press or key release and touch data indicating a key touch strength from a signal indicating the on / off state of each key switch received from the keyboard 150, and causes the CPU 10 to generate the touch data. send.

The key data is composed of a bit string corresponding to each key, and each bit indicates "1" indicating that a key is being depressed when both of the two key switches provided on the key are turned on. Otherwise, it is set to "0" indicating that the key is being released. The touch data is created based on the time from when one key switch is turned on to when the other key switch is turned on. CPU10
Performs tone generation or mute processing corresponding to key depression or key release based on the key data and touch data sent from the key scan circuit 15.

A D / A converter 161 is connected to the musical sound generator 16. The musical sound generating unit 16 is composed of, for example, a digital signal processor (DSP). The musical tone generating section 16 is provided with a plurality of tone generation channels and generates a digital musical tone signal in response to an instruction from the CPU 10. This digital tone signal is sent to the D / A converter 16
Sent to 1.

The D / A converter 161 converts the input digital musical tone signal into an analog musical tone signal. This D / A
The output from the conversion unit 161 is the analog signal processing unit 162.
Sent to. The analog signal processing section 162 performs simple filter processing such as removing noise of the analog musical tone signal sent from the D / A conversion section 161, amplification processing, and effect addition processing. The analog tone signal output from the analog signal processing unit 162 is sent to the amplifier 163. The amplifier 163 amplifies the input musical sound signal and sends it to the speaker 164. The speaker 164 is the amplifier 16
The tone signal from 3 is converted into an acoustic signal and output. As a result, a musical sound is generated from the speaker 164.

Next, the operation of the electronic musical instrument to which the parameter setting device according to the embodiment of the present invention configured as described above is applied will be described with reference to the flowcharts of FIGS.

FIG. 3 is a flow chart showing the main processing of this electronic musical instrument. This main processing routine is started when the power is turned on. That is, when the power is turned on, first, the initial setting process is performed (step S1).
0). In this initialization processing, the inside of the CPU 10 is reset and the buffers, registers, counters, flags, etc. defined in the work memory 12 are initialized.

Upon completion of this initialization process,
Panel processing is performed (step S11). In this panel processing, panel data is read from the switch mounted on the operation panel 130. The CPU 10 processes the event of each switch based on this panel data. Details of this panel processing will be described later.

Next, keyboard processing is performed (step S).
12). In this keyboard processing, the keyboard 150 is scanned. The signal obtained by this scan is passed through the key scan circuit 15 as C data as key data and touch data.
It is read by the PU 10.

Based on the read key data, the CPU 10 first checks whether there is a key event. Then, when it is determined that there is a key event, it is checked whether the key event is an on event. Here, if it is determined that the event is an on event, sound generation processing is executed. As a result, the sound corresponding to the pressed key is generated with the strength according to the touch data. On the other hand, when the CPU 10 determines that the key event is the off event, the CPU 10 executes the muffling process. As a result, the sound corresponding to the released key is silenced at a predetermined speed.

When this keyboard processing is completed, the CPU 10
Then executes automatic performance processing (step S1).
3). In this automatic performance process, a demonstration song is automatically played when the demo switch 132 is pressed, an automatic accompaniment sound is generated when the automatic accompaniment switch 133 is pressed, a metronome sound is generated when the metronome switch 139 is pressed, and a play is performed. / Stop switch 14
When 0 is pressed, reproduction processing of the performance based on the performance data recorded in the sequence memory is performed.

Then, "other processing" is performed (step S14). In this "other processing", for example,
A process of transmitting / receiving MIDI data to / from an external MIDI device via a MIDI interface circuit (not shown) is performed. After that, returning to step S11,
Similar processing is repeated.

As described above, when the switches and keyboard 150 mounted on the operation panel 130 are operated in the course of repeatedly executing steps S11 to S14 of the main processing routine, the process corresponding to the operation is performed. As a result, various functions as an electronic musical instrument are realized.

Next, the details of the panel processing will be described with reference to the flow charts shown in FIGS.
This panel processing routine is periodically called from the main processing routine described above.

In the panel process, first, the scan process is performed (step S20). That is, the CPU 10 gives a scan instruction to the panel scan circuit 13. As a result, the panel scan circuit 13 scans the switch mounted on the operation panel 130 and sends the obtained signal as panel data to the CPU 10.

Then, it is checked whether or not there is an on event of the automatic accompaniment switch 133 (step S2).
1). This is the automatic accompaniment switch 13 in the panel data.
This is done by checking whether the bit corresponding to 3 has changed from "0" to "1". Specifically, the bit corresponding to the automatic accompaniment switch 133 in the panel data obtained in the previous scan processing is “0”, and corresponds to the automatic accompaniment switch 133 in the panel data obtained in the current scan processing. It is checked whether the bit to be executed is "1". The presence / absence of an on event of another switch described below can be checked in the same manner as above.

When it is determined that the automatic accompaniment switch 133 has an on event, it is then checked whether the automatic accompaniment switch 133 is being pressed (step S22). This is performed by checking whether the bit corresponding to the automatic accompaniment switch 133 in the panel data has changed from the state of "1". Specifically, the bit corresponding to the automatic accompaniment switch 133 in the panel data obtained by the previous scan processing is “1”, and corresponds to the automatic accompaniment switch 133 in the panel data obtained by the current scan processing. It is checked whether the bit to be executed is also "1". The inspection as to whether or not other switches are being pressed, which will be described below, is performed in the same manner as above.

If it is determined that the automatic accompaniment switch 133 is being pressed, then the up switch 1
It is checked whether there is an on event of 35a (step S23). If it is determined that there is an on event of the up switch 135a, a process of increasing the volume of the automatic accompaniment sound is performed (step S24).

Specifically, first, the contents of the value register are incremented. Then, normalization is performed by dividing the incremented result by "127". As a result, a value in the range of "0.0" to "1.0" is obtained. At this time, when the value “0.0” is obtained, it is converted to the value “0.1”. The contents of the master volume register are then multiplied by the value thus normalized. As a result, the final volume value of the automatic accompaniment sound is obtained. The obtained volume value is used as the analog signal processing unit 162.
(The path is omitted in FIG. 1) to determine the final volume of the automatic accompaniment sound. In this way, the volume of the automatic accompaniment sound is controlled to relatively increase with respect to the overall volume set by the master volume 131.

In step S23, the up switch 13
When it is determined that there is no on event of 5a, it is checked whether or not there is an on event of down switch 135b (step S25). Here, down switch 1
If it is determined that there is an on event of 35b, a process of reducing the volume of the automatic accompaniment sound is performed (step S2).
6).

Specifically, first, the contents of the value register are decremented. Then, the decremented result is normalized in the same manner as the processing performed in step S24, and the normalized value is multiplied by the content of the master volume register. As a result, the final volume value of the automatic accompaniment sound is obtained. The obtained sound volume value is sent to the analog signal processing unit 162 (the path is omitted in FIG. 1), and the final sound volume of the automatic accompaniment sound is determined. In this way, the volume of the automatic accompaniment sound is controlled to be reduced relative to the overall volume set by the master volume 131.

By the processing of steps S22 to S26, when the up switch 135a is pressed while the automatic accompaniment switch 133 is continuously pressed, the volume of the automatic accompaniment sound is increased, and when the down switch 135b is pressed, the volume is decreased. To do.

If it is determined in step S22 that the automatic accompaniment switch 133 is not being pressed, it is then checked whether or not there is an on event of the up switch 135a (step S27). If it is determined that there is an on event of the up switch 135a,
A process of increasing the tempo of the automatic accompaniment is performed (step S28).

Specifically, first, the contents of the value register are incremented. Then, the contents of the value register are sent to a tempo register (not shown) provided in the work memory 12. After that, the CPU 10 executes the automatic performance process (step S13) at a cycle designated by the contents of the tempo register. As a result, the tempo of the automatic accompaniment is controlled to increase.

In step S27, the up switch 13
When it is determined that there is no on event of 5a, it is checked whether or not there is an on event of the down switch 135b (step S29). Here, down switch 1
If it is determined that there is an on event of 35b, processing for reducing the tempo of the automatic accompaniment is performed (step S3).
0).

Specifically, first, the contents of the value register are decremented. Then, the contents of the value register are sent to the tempo register. After that, the CPU 10
Performs automatic performance processing (step S13) at a cycle designated by the contents of the tempo register. As a result, the tempo of the automatic accompaniment is controlled to decrease.

By the processes of steps S22 and S27 to S30, the value switch 135 is used as an operator for changing the tempo when the automatic accompaniment switch 133 is not pressed and continues, and when the up switch 135a is pressed, the automatic accompaniment is performed. Is increased, and when the down switch 135b is pressed, the tempo is decreased.

If it is determined in step S21 that the automatic accompaniment switch 133 has no on-event, then it is checked whether or not the metronome switch 139 has an on-event (step S31).

If it is determined that the metronome switch 139 has an on event, then it is checked whether the metronome switch 139 is being pressed (step S32).

When it is determined that the metronome switch 139 is being pressed, it is then checked whether or not there is an on event of the up switch 135a (step S33). Here, the up switch 135a
If it is determined that there is an on event of, the process of increasing the volume of the metronome sound is performed (step S3).
4).

Specifically, first, the content of the value register is incremented. Then, normalization is performed in the same manner as the process of step S24. The contents of the master volume register are then multiplied by the value thus normalized. As a result, the final volume value of the metronome sound is obtained. The obtained sound volume value is sent to the analog signal processing unit 162 (the path is omitted in FIG. 1), and the final sound volume of the metronome sound is determined. In this way, the volume of the metronome sound is controlled to increase relative to the overall volume set by the master volume 131.

In step S33, the up switch 13
When it is determined that there is no on event of 5a, it is checked whether or not there is an on event of the down switch 135b (step S35). Here, down switch 1
When it is determined that there is an on event of 35b, a process of reducing the volume of the metronome sound is performed (step S36).

Specifically, first, the contents of the value register are decremented. Then, the decremented result is normalized in the same manner as the processing performed in step S24, and the normalized value is multiplied by the content of the master volume register. As a result, the final metronome sound volume value is obtained. The obtained sound volume value is sent to the analog signal processing unit 162 (the path is omitted in FIG. 1), and the final sound volume of the metronome sound is determined. In this way, the master volume 131
The volume of the metronome sound is controlled so as to decrease relative to the overall volume set by.

By the processes of steps S32 to S36, when the up switch 135a is pressed while the metronome switch 139 is continuously pressed, the volume of the metronome sound increases, and when the down switch 135b is pressed, the volume decreases.

When it is determined in step S32 that the metronome switch 139 is not being pressed, it is then checked whether or not there is an on event of the up switch 135a (step S37). If it is determined that there is an on event of the up switch 135a, a process for increasing the metronome tempo is performed (step S38).

Specifically, first, the contents of the value register are incremented. Then, the contents of the value register are sent to a tempo register (not shown) provided in the work memory 12. After that, the CPU 10 executes the metronome sound generation process (step S13) at a cycle designated by the contents of the tempo register. As a result, the tempo of the metronome sound is controlled to increase.

In step S37, the up switch 13
If it is determined that there is no on event of 5a, it is checked whether or not there is an on event of the down switch 135b (step S39). Here, down switch 1
When it is determined that there is an on event of 35b, a process of reducing the tempo of the metronome is performed (step S40).

Specifically, first, the contents of the value register are decremented. Then, the contents of the value register are sent to the tempo register. After that, the CPU 10
Performs metronome sound generation processing (step S13) at a cycle designated by the contents of the tempo register. As a result, the tempo of the metronome sound is controlled to decrease.

By the processing of steps S32 and S37 to S40, the value switch 135 is used as an operator for changing the tempo of the metronome sound when the metronome switch 139 is not pressed and continues, and when the up switch 135a is pressed. The tempo increases, and when the down switch 135b is pressed, the tempo decreases.

If it is determined in the above step S31 that the metronome switch 139 has no on-event, other panel processing is performed (step S31). In this "other panel processing", processing according to an event other than the above-mentioned switch is executed. After that, the sequence returns to the main processing routine.

As described above, according to the parameter setting device for an electronic musical instrument of the embodiment of the present invention, when the value switch is operated while the automatic accompaniment switch is kept pressed, the volume of the automatic accompaniment sound is changed, The tempo of the automatic accompaniment can be changed by operating the value switch without pressing and holding the automatic accompaniment switch. Similarly, if the value switch is operated with the metronome switch held down, the volume of the metronome sound is changed, and if the value switch is operated without the metronome switch being held down, the tempo of the metronome sound can be changed. Therefore, even when the value switch is commonly used for a plurality of purposes, it is not necessary to perform a complicated operation to set the parameter, and the parameter can be set by a simple operation.

[0072]

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

[Brief description of drawings]

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

FIG. 2 is a diagram showing a configuration of an example of an operation panel shown in FIG.

FIG. 3 is a flowchart showing a main process used in the embodiment of the present invention.

FIG. 4 is a flowchart showing panel processing (No. 1) used in the embodiment of the present invention.

FIG. 5 is a flowchart showing panel processing (No. 2) used in the embodiment of the present invention.

[Explanation of symbols]

10 CPU 11 Program memory 12 work memory 13 Panel scan circuit 14 Display 15 key scan circuit 16 Tone generator 30 bus 131 Master Volume 133 Automatic accompaniment switch 135 Value Switch 135a up switch 135b down switch 139 metronome switch 150 keyboards 161 D / A converter 162 analog signal processor 163 amplifier 164 speaker

Claims (5)

[Claims] 1. A function selection operator for selecting a function, an increase / decrease operator for instructing an increase / decrease of a parameter value, and when the function selection operator is not being pressed when the increase / decrease operator is operated. The tempo of the sound generated based on the function selected by the function selection operator is changed according to the parameter value instructed by the increase / decrease operator, and if the function selection operator is being pressed, the function selection operator A parameter setting device for an electronic musical instrument, comprising: a controller that changes the volume of a sound generated based on the function selected in step 1 according to the parameter value instructed by the increase / decrease operator. 2. The parameter setting device for an electronic musical instrument according to claim 1, wherein the function selected by the function selection operator is an automatic accompaniment function for generating an automatic accompaniment sound. 3. A master volume operator for controlling the overall volume, wherein the controller controls the volume of the automatic accompaniment sound set by the master volume operator by a parameter instructed by the increase / decrease operator. The parameter setting device for an electronic musical instrument according to claim 2, which is changed according to a value. 4. The parameter setting device for an electronic musical instrument according to claim 1, wherein the function selected by the function selection operator is a metronome function for generating a metronome sound. 5. A master volume operator for setting the overall volume, wherein the control unit sets the volume of the metronome sound set by the master volume operator to a parameter value instructed by the increase / decrease operator. The parameter setting device for an electronic musical instrument according to claim 4, which is changed according to