JPH07146681A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To provide the electronic musical instrument capable of preventing the inadvertent start of a system setting mode in an ordinary performance state with the electronic musical instrument which exactly shifts to the system setting mode for setting various kinds of parameters. CONSTITUTION:This electronic musical instrument has the system setting mode which is an operation mode for setting the parameters and automatically executes rhythm performance data in accordance with the rhythm performance data previously prepared. The electronic musical instrument described above is constituted by having a tempo assigning means 16 for assigning the temp. of the rhythm performance, a system operator for instructing that the performance must be shifted to the system setting mode and a control system 10 which shifts the performance to the system setting mode if the specific tempo is assigned by the tempo assigning means 16.

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 that accurately shifts to a system setting mode for setting various parameters.

[0002]

2. Description of the Related Art Conventionally, electronic musical instruments with a rhythm playing function have been developed and put into practical use. In such an electronic musical instrument, a plurality of rhythms are generally prepared, and the operator can automatically perform a desired rhythm performance by selecting one rhythm from the plurality of rhythms. The performer operates a manipulator for instructing the sounding of the electronic musical instrument, for example, a keyboard for a keyboard-type electronic musical instrument or a string for a guitar-type electronic musical instrument, so that a melody with a rhythm performance as a background is played. It is possible to play.

By the way, electronic musical instruments generally have a special operation mode called a system setting mode. This system setting mode is used to set parameters for performing, for example, selection of a tone color, selection of a type of acoustic effect, designation of the degree of application of the acoustic effect, and the like.
Therefore, usually, in many cases, various parameters are set in the system setting mode to set up the electronic musical instrument before the performance, and it is rare to set the parameters in the system setting mode during the performance.

Therefore, the switch for shifting to the system setting mode is a place where the player rarely touches during a normal performance so as not to shift to the system setting mode against the intention of the player during the performance. It is arranged such that the system is set to the system setting mode only when a plurality of specific switches are pressed at the same time.

[0005]

However, even if the above measures are taken, a musical instrument such as a guitar-type electronic musical instrument which is hung from the shoulder and used such that the operator cannot easily see the musical instrument during the musical performance You may accidentally press the switch to enter the system setting mode. If such a situation occurs, the electronic musical instrument will behave unexpectedly, and there is a problem that the performance will be interrupted.

Whether or not the electronic musical instrument is in the system setting mode can usually be confirmed by looking at the display on the display. However, in the case of an electronic musical instrument having no display, it is possible to confirm that the electronic musical instrument is in the system setting mode. There was also the problem of being late to notice.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an electronic musical instrument capable of preventing the system setting mode from being inadvertently entered in a normal playing state.

[0008]

In order to achieve the above object, the electronic musical instrument of the present invention has a system setting mode which is an operation mode for setting a parameter, and stores the rhythm performance data prepared in advance. In an electronic musical instrument that automatically performs rhythm performance based on the above, tempo designating means for designating the tempo of the rhythm performance, a system operator for instructing transition to a system setting mode, and system setting by the system operator When it is instructed to shift to the mode, control means for shifting to the system setting mode if a specific tempo is designated by the tempo designating means is provided.

Further, for the same purpose, the control means of the electronic musical instrument of the present invention is to shift to the system setting mode when the minimum tempo or the maximum tempo of the rhythm to be played is specified as the specific tempo. Characterize.

[0010]

In this electronic musical instrument, when the system operator is operated to shift to the system setting mode,
Only when the tempo designated by the tempo designating unit at that time point is a specific tempo, for example, the minimum tempo or the maximum tempo of the rhythm to be played, the system setting mode is entered.

In a normal performance, the probability of performing the rhythm at the minimum tempo or the maximum tempo is extremely low,
Often played before or after the standard tempo of the rhythm. Therefore, in a normal playing state, that is, in a state where the tempo is other than the minimum tempo or the maximum tempo,
The electronic musical instrument is not shifted to the system setting mode even if the player mistakenly operates the operation element for instructing to enter the system setting mode. As a result, it is possible to prevent the careless transition to the system setting mode.

[0012]

Embodiments of the electronic musical instrument of the present invention will now be described in detail with reference to the drawings. In this embodiment, a keyboard type electronic musical instrument is adopted, and the configuration and operation for shifting to the system setting mode will be mainly described.
The present invention is not limited to this, and can be applied to various types of electronic musical instruments such as a guitar type.

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an electronic musical instrument according to the present invention. The electronic musical instrument includes a central processing unit (hereinafter referred to as "CPU") 10, a program memory 11, a random access memory (hereinafter referred to as "RA").
M ”. ) 12, panel interface circuit 13,
Keyboard interface circuit 17, rhythm performance data memory 19, waveform memory 20 and tone generator (tone generator)
21 are connected to each other via a system bus 30.

The CPU 10 corresponds to a control means, and controls the entire electronic musical instrument according to a control program stored in the program memory 11. This CP
U10 includes a time counter (not shown). This time counter starts counting operation when it is set to the rhythm performance mode (an operation mode relative to the normal performance mode and is a mode in which rhythm performance is automatically performed), and the rhythm performance mode continues thereafter. While it is being counted, it is incremented at regular intervals. This time counter is used to detect the timing of sound generation or mute in the rhythm performance processing described later.

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

The program memory 11 is composed of, for example, a ROM. The program memory 11 stores not only the control program for operating the CPU 10 described above, but also various fixed data used by the CPU 10 for various processes. Further, the conversion table 110 shown in FIG. 6 is stored in the program memory 11. Details of the conversion table 110 will be described later.

The content of this program memory 11 is the CPU
Read by 10. That is, the CPU 10 reads a control program (command) from the program memory 11 for interpretation / execution, reads predetermined fixed data for use in various processes, and further refers to the conversion table 110 to refer to a tempo setting volume 16 described later. Predetermined conversion is applied to the data imported from. Details of this data conversion will be described later.

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

An operation panel 14 and an A / D converter 15 are connected to the panel interface circuit 13. The tempo setting volume 16 mounted on the operation panel 14 is connected to the A / D converter 15.

The operation panel 14 is used for instructing the electronic musical instrument to perform various operations, and is constructed, for example, as shown in FIG. In addition to the tempo setting volume 16, the operation panel 14 is provided with a rhythm start switch 140, a rhythm selection switch 141, an up / down switch 142 composed of a down switch 142A and an up switch 142B, a display 143, and the like. There is. Although various switches and indicators other than those mentioned above are provided on the operation panel 14, the illustration of switches and indicators not directly related to the present invention is omitted in FIG.

The rhythm start switch 140 is used to instruct the start or stop of the rhythm performance. The operation mode of this electronic musical instrument is the rhythm start switch 1
Each time 40 is pressed, the rhythm performance mode and the normal performance mode are alternately inverted.

The rhythm selection switch 141 is used to shift the electronic musical instrument to the rhythm selection mode. The rhythm selection mode is one of the operation modes of the electronic musical instrument, and is a mode used for selecting one rhythm from a plurality of rhythms. This rhythm selection switch 1
Each time 41 is pressed, the electronic musical instrument shifts to the rhythm selection mode or returns from the rhythm selection mode to the original mode. By operating the up / down switch 142 described later in the rhythm selection mode by the rhythm selection switch 141, one rhythm is selected from various rhythms such as 8-beat, waltz, and mambo.

The up / down switch 142 includes the down switch 142A and the up switch 142 as described above.
It is composed of B and. This up-down switch 14
2 is a system operator used for selecting a rhythm in combination with the rhythm selection switch 141 as described above, and a system operator for shifting to the system setting mode by simultaneously pressing the down switch 142A and the up switch 142B. Function as. Further, the up / down switch 142 is used in the system setting mode for selecting a tone color, selecting a sound effect, setting the degree of sound effect, and other various parameters.

In this embodiment, the down switch 14
When 2A and the up switch 142B are pressed at the same time, they function as a system operator and are configured to shift to the system setting mode. The system operator is, for example, a dedicated one for shifting to the system setting mode. Switch may be provided, or when some of the other switches (rhythm start switch 140, rhythm selection switch 141, etc.) are pressed at the same time, it is configured to function as a system operator that shifts to the system setting mode. May be.

The display 143 is, for example, a 7-segment L
The ED display is provided for two digits. On the display 143, numbers, letters and the like are displayed according to the data sent from the CPU 10. For example, when the up / down switch 142 is pressed while the rhythm selection switch 141 is operated to enter the rhythm selection mode, the rhythm number of the rhythm selected according to the operation of the up / down switch 142 is displayed. When the tempo setting volume 16 is operated, the tempo value according to the operation position is displayed. The display device 143 is not limited to the 7-segment LED, and for example, an LCD display device or another display device can be used.

The tempo setting volume 16 corresponds to a tempo designating means and is used for designating the tempo of the rhythm performance. This tempo setting volume 16
Is composed of, for example, a rotary potentiometer with a midpoint click. From the tempo setting volume 16, an analog voltage signal corresponding to the set position is output. For example, in FIG. 2, the minimum voltage (for example, ground voltage) is output at the position where the knob is turned to the leftmost side (MIN position), and the maximum voltage (for example, power supply voltage) is output at the position where the knob is turned rightmost (MAX position). At the middle point click position (MID position), an intermediate voltage between the ground voltage and the power supply voltage is output. The analog voltage signal output from the tempo setting volume 16 is sent to the A / D converter 15.

The A / D converter 15 is a well-known one for converting an analog voltage signal into a digital signal, and is an A / D converter composed of an integrated circuit or an A / D composed of a ladder resistor. A conversion circuit or the like can be used. This A
If the analog voltage signal input to the / D converter 15 is the minimum voltage, it is converted to a digital signal of "00H"("H" at the end indicates a hexadecimal number. The same applies hereinafter), and the maximum voltage is obtained. If it is a voltage, it is converted into a digital signal of "FFH", and if it is an intermediate voltage, it is converted into a digital signal according to the input voltage within the range of "00H to FFH". This A
The digital signal output from the / D converter 15 is sent to the panel interface circuit 13.

The panel interface circuit 13 includes the operation panel 14, the tempo setting volume 16 and the CPU 1.
It controls transmission / reception of data to / from 0. That is,
The panel interface circuit 13 sends a scan signal to the operation panel 14 (excluding the tempo setting volume 16), and the operation panel 14 responds to the scan signal.
Input the signal indicating the on / off state of each switch sent back from. Then, from this signal, panel data in which each switch is turned on / off corresponding to 1 bit is generated,
Send to 10. This panel data is stored in the RAM 12 under the control of the CPU 10 and is used to determine the presence / absence of a panel event (details will be described later).

Further, the panel interface circuit 13 is
The A / D converter 15 is periodically scanned to capture a digital signal indicating the current setting position of the tempo setting volume 16. Then, this digital signal is sent to the CPU 10 as tempo data. This tempo data is CP
It is stored in the RAM 12 under the control of U10, and is used to determine the presence / absence of an event in the tempo setting volume 16 after performing a predetermined table conversion (details will be described later).

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

In this embodiment, the tempo setting volume 16 using a rotary potentiometer is used as the tempo designating means, and the voltage signal output from the tempo setting volume 16 is converted by the A / D converter 15. However, the tempo designating means is not limited to this. For example, the tempo setting volume 16 composed of a rotary potentiometer can be replaced with a slide type operator with a middle point click. Also,
A dial type operator using a rotary encoder can be used as the tempo designating means. in this case,
The pulse generated in response to the rotation of the dial is directly sent to the panel interface circuit 13. The panel interface circuit 13 counts the number of received pulses to obtain the set tempo. According to this method, there is an advantage that the A / D converter becomes unnecessary.

The up / down switch 142 may be used as the tempo designating means. In this case, a tempo selection switch is newly provided, and after the operation mode of the electronic musical instrument is set to the tempo setting mode by this tempo selection switch, the down switch 142A or the up switch 1
42B is operated to set the tempo, or the down switch 142A and the up switch 142B are simultaneously pressed to shift to the system setting mode, and then the down switch 142A or the up switch 142B is operated within the system setting mode. Can be configured to set.

A keyboard device 18 is connected to the keyboard interface circuit 17. The keyboard device 18 has a plurality of keys for designating a pitch. Each key of the keyboard device 18 is provided with a key switch that opens and closes in conjunction with key depression or key release, and a signal indicating ON / OFF of the key switch is sent to the keyboard interface circuit 17.

The keyboard interface circuit 17 controls transmission / reception of data between the keyboard device 18 and the CPU 10. That is, the keyboard interface circuit 17 sends a scan signal to the keyboard device 18, and inputs a signal indicating the ON / OFF state of each key switch returned from the keyboard device 18 in response to the scan signal. Then, from this signal, key data in which ON / OFF of each key switch is associated with 1 bit is generated and sent to the CPU 10. This key data is stored in the RAM 12 under the control of the CPU 10 and is used to determine the presence / absence of a keyboard event (details will be described later).

The rhythm performance data memory 19 is, for example, R
It is composed of OM. This rhythm performance data memory 1
9 stores rhythm performance data corresponding to a plurality of rhythms. Also, this rhythm performance data memory 19
Stores a start address table and a tempo table.

The rhythm performance data is, for example, a chord,
It is composed of three types of data for generating three part sounds such as a bass and a drum. The rhythm performance data of each part is created in the same format as MIDI data, for example, and includes step time data for instructing the sound generation timing. The rhythm performance data stored in the rhythm performance data memory 19 is converted into a format that can be processed by the sound source 21 in the rhythm performance processing described later and is sent to the sound source 21.

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

The tempo table contains standard tempo data (preset tempo data), minimum tempo data and maximum tempo data, which are optimum tempos for performing a rhythm performance based on the rhythm performance data. , Are stored corresponding to each rhythm performance data.

The rhythm performance data, the start address table and the tempo table may be stored in a part of the RAM 12 instead of the rhythm performance data memory 19. In this case, for example, a floppy disk device (or a ROM card controller) is connected to the system bus 30, and a floppy disk (or RO) is connected.
The rhythm performance data, the start address table, and the tempo table are stored in the M card), and, for example, a floppy disk (or a ROM card inserted in the ROM card controller) installed in the floppy disk device when the electronic musical instrument is powered on. From the above rhythm performance data,
RAM for start address table and tempo table
It suffices to configure it so that it is loaded to 12.

The waveform memory 20 stores pulse code modulated (PCM) waveform data. The waveform memory 20 stores a plurality of types of waveform data corresponding to each tone color, each key range, key pressing speed, etc. in order to realize a plurality of tone colors. This waveform data is selected and read according to the tone color designated when a sounding instruction is given, the pitch (key range) for which the sounding instruction is given, the velocity of the sound related to the sounding instruction, and the like.

The sound source 21 is composed of, for example, a plurality of oscillators. Then, one to several oscillators are assigned to each sounding channel determined to generate a musical tone corresponding to a key depression of the keyboard device 18 or a musical tone corresponding to each part of the rhythm performance. It has become. The oscillator to which the tone is assigned reads the waveform data stored in the waveform memory 20 in a time division manner and adds an envelope to the waveform data to generate a digital musical tone signal. The digital musical tone signal generated by the sound source 21 is sent to the D / A converter 22.

The D / A converter 22 converts the input digital musical tone signal into an analog musical tone signal and outputs it. The analog tone signal output by the D / A converter 22 is sent to the amplifier 23.

The amplifier 23 amplifies the input analog musical tone signal with a predetermined amplification factor and outputs it. The analog tone signal output by the amplifier 23 is a speaker 24.
Sent to.

The speaker 24 is a well-known one which converts an analog musical tone signal as an electric signal into an acoustic signal. By the speaker 24, a musical sound according to the operation of the keyboard device 18 or a musical sound according to the rhythm performance data read from the rhythm performance data memory 19 is emitted.

Next, the operation of the embodiment of the electronic musical instrument according to the present invention having the above-mentioned configuration will be described with reference to the flow charts shown in FIGS. 3 to 5, focusing on the transition operation to the system setting mode. .

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

This initialization process is a process of setting the internal state of the CPU 10 to the initial state and setting the initial values to the registers, counters or flags defined in the RAM 12. Further, in this initialization process, the sound source 21
Also, a process of sending predetermined data to the device to prevent generation of unnecessary sound when the power is turned on is also performed. When this initialization processing is completed, switch event processing is then performed (step S11). For details of this switch event processing,
This is shown in the flow chart of FIG.

In the switch event process, first, a panel scan is performed (step S20). This is done as follows. That is, first, the panel interface circuit 13 operates the operation panel 14 in response to an instruction from the CPU 10.
In response to the scan signal, a signal indicating the on / off state of each switch, which is returned from the operation panel 14, is input. Then, from this signal, panel data (hereinafter referred to as "new panel data") in which each switch is turned on / off corresponding to 1 bit is generated. Next, the panel data that has been read last time and already stored in the RAM 12 (hereinafter referred to as "old panel data") is compared with the new panel data to create a panel event map in which different bits are turned on.

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

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

In this switch processing, it is first checked whether or not there is an on event of the up switch 142B (step S30). This is because the bit corresponding to the up switch 142B in the event map is turned on and the up switch 14 in the new panel data is
This is done by checking if the bit corresponding to 2B is turned on.

If it is determined here that the up switch 142B is an on event, then it is checked whether or not the down switch 142A has already been turned on (step S31). This is done by checking whether the bit corresponding to the down switch 142A in the old panel data is turned on. In addition,
The above step S30 and step S31 are in reverse order,
That is, the configuration may be such that the presence or absence of an on event of the down switch 142A is checked first, and then whether or not the up switch 142B has already been turned on.

If it is determined that the down switch 142A is already turned on, the CPU 10 recognizes that the up switch 142B and the down switch 142A are simultaneously pressed, and then the tempo currently set. Is checked for the minimum tempo (step S32). This is because the value set in the tempo register provided in the RAM 12 described later is RA
This is performed by checking whether it is the same as the value set in the lowest tempo buffer provided in M12.

Then, if it is determined that the currently set tempo is the minimum tempo, a transition process to the system setting mode is performed (step S33). This transition process is, for example, a process of muting all sounds that are currently sounding and enabling setting of various parameters by the up / down switch 142. Therefore, in this system setting mode, the player uses the up / down switch 142 to select a tone color, select a sound effect, and set parameters for instructing the degree of the sound effect.

When the process of shifting to the system setting mode is completed, the process returns from this switch processing routine and returns to the switch event processing routine. On the other hand, if it is determined in step S32 that the tempo is not the lowest tempo, the process of shifting to the system setting mode is skipped, and the process returns from this switch processing routine to the switch event processing routine.

As described above, even if the up switch 142B and the down switch 142A are pressed at the same time, if the tempo set at that time is not the minimum tempo, the process of shifting to the system setting mode is not performed. Even if the performer mistakenly presses the up switch 142B and the down switch 142A at the same time during the performance (usually, the minimum tempo is not set), the system setting mode is not entered.

In step S30, the up switch 14
If it is determined that it is not the 2B on event, or if it is determined in step S31 that the down switch 142A has not already been turned on, "other processing" is performed. In this "other processing", processing for events of various switches provided on the operation panel 14 is performed.

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

In this "other processing", for example, the rhythm selection switch 14 in the panel event map is used.
If it is determined that there is an on event of the rhythm selection switch 141 by checking whether or not the bit corresponding to 1 is turned on, the rhythm selection mode is entered, and the rhythm change processing is performed. In this rhythm changing process, the rhythm number of the new rhythm selected by operating the up / down switch 142 is set in the rhythm number register provided in the RAM 12.

In the rhythm changing process, the standard tempo data, the minimum tempo data and the maximum tempo data corresponding to the newly selected rhythm number are fetched from the tempo table. The standard tempo data, the minimum tempo data and the maximum tempo data are stored in the RAM 12 respectively.
Stored in the standard tempo buffer, the minimum tempo buffer, and the maximum tempo buffer, and is used for calculating a new tempo value in the tempo setting volume processing described later. The contents of the minimum tempo buffer are also used to determine whether the currently set tempo is the minimum tempo, as described above.

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

In the switch event processing routine, LED processing is then performed (step S23). This L
The ED process is a process of displaying predetermined data on the display 143 of the operation panel 14. In this LED processing, for example, when a rhythm is newly selected using the rhythm selection switch 141 and the up / down switch 142,
A process of displaying the rhythm number is performed. This display is realized by sending the data corresponding to the rhythm number set in the rhythm number register to the operation panel 14 via the panel interface circuit 13. This allows the performer to know which rhythm is currently selected.

When the LED processing is completed, the tempo setting volume processing is then performed (step S2).
4). In this tempo setting volume processing, first, tempo data is taken in. That is, the CPU 10
At that time, the tempo data set in the tempo setting volume 16 is taken in via the A / D converter 15 and the panel interface circuit 13. The tempo data fetched here has any value within the range of “00H to FFH” according to the setting position of the tempo setting volume 16.

Next, table conversion processing is performed. This table conversion process eliminates voltage fluctuations caused by other than operation of the tempo setting volume 16, for example, voltage fluctuations caused by fluctuations in the power supply voltage.
The tempo data of 256 levels from "00H to FFH" is set to "0
This is performed in order to compress the tempo data in 128 steps of "0H to 7FH". The conversion table 110 shown in FIG. 6, for example, is used for this table conversion processing.

The conversion table 110 includes a lower limit position (MIN position) and a middle point position (MID) of the tempo setting volume 16.
Position) and upper limit position (MAX position) to form a dead zone, "00H" is output when the input value is "00H-0FH", and when the input value is "78H-87H". "40H" is output and the input value is "F0H-FF
In the case of "H", "7FH" is output. In addition, the input value is "10H-77H" and "88H
In the range of "-EFH", a value that gradually increases according to the input value is output.

With such a configuration, even if the power supply voltage fluctuates a little while the tempo setting volume 16 is set near the lower limit position, the midpoint position or the upper limit position, the tempo value can be maintained at the previous state. Has been realized. Further, according to this configuration, since the tempo data of 128 steps can be obtained only by converting the tempo data read from the tempo setting volume 16 using the conversion table 110, the reaction speed to the operation of the tempo setting volume 16 is high. There are advantages.

When the accuracy of the tempo setting is required rather than the response speed to the operation of the tempo setting volume 16, the tempo data from the tempo setting volume 16 is read a plurality of times, and the tempo setting is made only when these are the same value. The volume 16 may be determined to be the tempo data actually set. According to this configuration, although the processing takes some time, it is possible to read the accurate tempo set value.

When the table conversion process is completed, it is then determined whether the tempo data obtained by the table conversion is the same as the tempo data obtained by the previous table conversion and stored in a predetermined area of the RAM 12, that is, the tempo data. The presence or absence of an event in the setting volume 16 is checked.
If it is determined that the two tempo data are the same, that is, there is no event of the tempo setting volume 16, the tempo setting volume processing is terminated, the switch event processing routine is returned to the main routine.

On the other hand, if it is determined that the two tempo data are different, that is, there is an event of the tempo setting volume 16, the tempo setting process is performed. In this tempo setting process, the value stored in the standard tempo buffer is set to the midpoint click position (MID
Position), the value stored in the lowest tempo buffer to the lowest position (MIN position) of the tempo setting volume 16,
The value stored in the maximum tempo buffer is made to correspond to the maximum position (MAX position) of the tempo setting volume 16, and the tempo value corresponding to the current setting position of the tempo setting volume 16 is calculated.

Then, the calculated tempo value is stored in the RAM 1
2 is set in the tempo register. As described above, the value of the tempo register is referred to in step S32 of FIG. 5 to determine whether it is the minimum tempo. The value of this tempo register is
When the rhythm start switch 140 is pressed to enter the rhythm playing mode, for example, a two's complement is taken and set in a predetermined work counter, and the contents of this work counter are decremented at regular time intervals. Then, when the content of the work counter becomes zero, the two's complement value of the value of the tempo register is set again in the work counter. The time when the content of the work counter becomes zero is the timing for reading one rhythm performance data from the rhythm performance data memory 19.

Therefore, when a large value is set in the tempo register, the reading interval of the rhythm performance data becomes small and the tempo becomes fast. On the contrary, if a small value is set in the tempo register, the reading interval of the rhythm performance data becomes large and the tempo becomes slow. In this way, the tempo is changed according to the operation of the tempo setting volume 16. Then, the switch event processing routine is returned to the main routine.

Next, in the main routine, keyboard event processing is performed. This is done as follows.
That is, first, the keyboard interface circuit 17 causes the keyboard device 18 to
In response to the scan signal, a signal indicating the on / off state of each key switch returned from the keyboard device 18 is input. Then, key data (hereinafter referred to as "new key data") in which ON / OFF of each key switch is associated with 1 bit is generated from this signal. Next, the key data that has been previously read and already stored in the RAM 12 (hereinafter referred to as "old key data").
And the new key data are compared to create a key event map in which different bits are turned on.

When the creation of this key event map is completed, it is then checked whether or not there is a key event by referring to the above key event map. This is done by checking if there is any bit turned on in the key event map.

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

If it is determined here that the event is a key-on event, sound generation processing is performed. That is, the key number of the key related to the key depression, the tone color number selected at that time, the data indicating the keystroke strength, and the like are converted into data in a format that the sound source 21 can interpret, such as waveform address, frequency data, envelope data, and filter coefficient. It is converted and sent to the sound source 21. As a result, the sound source 21 activates the oscillator corresponding to the sounding channel assigned to the keyboard device. As a result, the oscillator reads out the waveform data from the waveform memory 20 and adds the envelope to the waveform data to generate a digital tone signal. This digital musical tone signal is sent to the D / A converter 2
It is converted into an analog tone signal in 2 and is sent to the speaker 24 after being amplified by the amplifier 23. This causes the speaker 24 to generate a musical sound corresponding to the key depression.

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

When this keyboard event processing is completed, MIDI processing is then carried out (step S13). In this MIDI processing, MIDI data is exchanged with an external device such as another electronic musical instrument, a sequencer, or a computer via the MIDI interface circuit 25. The tempo is set also by a MIDI message instructing the tempo setting. That is, when a MIDI message instructing the tempo setting is received,
The CPU 10 sets the tempo data included in the MIDI message in the tempo register in the RAM 12. As a result, the tempo is changed in the same manner as when the operation panel 14 is operated to set the tempo. Other MI
Since the processing for the DI message is not directly related to the present invention, its explanation is omitted.

Upon completion of this MIDI processing,
Rhythm performance processing is performed (step S14). The rhythm performance processing is performed when the rhythm performance flag is turned on and the rhythm performance data is read. Whether or not it is the read timing of the rhythm performance data is determined by whether or not the content of the work counter has become zero. When the above conditions are satisfied, one rhythm performance data is read from the rhythm performance data memory 19. Then, when the step time value included in the rhythm performance data and the time value counted up by a time counter (not shown) match, it is recognized that sounding or mute is to be performed, and sounding or mute processing is performed. Be seen.

That is, if the rhythm performance data is note-on data, sound generation processing is performed. In the tone generation processing, for example, waveform addresses, frequency data, envelope data, filter coefficients, etc. are generated based on the rhythm performance data read from the rhythm performance data memory 19, and the sound source 2
Sent to 1. Then, the digital tone signal is generated by the sound source 21, converted into an analog tone signal by the D / A converter 22, amplified by the amplifier 23, and sent to the speaker 24.
As a result, a rhythm sound is emitted from the speaker 24.

On the other hand, if it is the note-off data, the muffling process is performed. In this muffling process, predetermined data is transmitted to the sound source 2
1 to stop the generation of the digital tone signal in the sound source 21 and mute the sound being sounded. Note that the rhythm performance data includes, for example, data for instructing tone color change, volume change, etc. in addition to data for instructing note-on or note-off, but description thereof is omitted because it is not directly related to the present invention.

When the rhythm performance process is completed, "other process" is then performed (step S15).
The "other processing" includes a tone color changing processing accompanying the depression of a foot pedal (not shown). After that, the process returns to step S11, and the same processing is repeated thereafter. When an event based on a panel operation or keyboard operation occurs in the process of repeatedly executing steps S11 to S14 described above, various functions as an electronic musical instrument are exhibited by performing processing corresponding to the event.

As described above, according to this embodiment,
When the system is switched to the system setting mode by pressing the down switch 142A and the up switch 142B at the same time, the tempo designated by the tempo setting volume 16 at that time is a specific tempo, for example, the minimum tempo of the rhythm to be played. Alternatively, only when the tempo is the highest, the system setting mode is entered.

In normal performance, the probability of performing the rhythm at the minimum tempo or the maximum tempo is extremely low,
Often played before or after the standard tempo of the rhythm. Therefore, in a normal playing state, that is, in a state where the tempo is other than the minimum tempo or the maximum tempo,
Even if the player mistakenly presses the down switch 142A and the up switch 142B at the same time, the electronic musical instrument is not shifted to the system setting mode. As a result, it is possible to prevent the careless transition to the system setting mode.

In the above embodiment, the system is set to the system setting mode only when the down switch 142A and the up switch 142B are pressed at the same time when the tempo is set to the minimum tempo. , The down switch 142A and the up switch 142B are set only when the down switch 142A and the up switch 142B are simultaneously pressed in the state of being set to the maximum tempo, or in the state of being set to either the minimum tempo or the maximum tempo. The system may be configured to shift to the system setting mode only when they are pressed at the same time, and in these cases, the same operation and effect as those of the above-described embodiment can be obtained.

Further, when a midpoint return type manipulator or a manipulator having a click at the midpoint is used as the tempo setting volume, the down switch 142A and the up switch are operated while these manipulators are set to the midpoint. When the switches 142B are simultaneously pressed, the system setting mode may be entered.

Further, in the above embodiment, the transition to the system setting mode is possible only when the tempo is set to a specific tempo, but other music elements, for example, the volume is set to the minimum value. The system may be configured to shift to the system setting mode only when it is present. The volume value is never set to the minimum value in a normal playing state. Therefore, also in this case, the same operation and effect as described above are achieved.

[0087]

As described in detail above, according to the present invention,
It is possible to provide an electronic musical instrument capable of preventing the system setting mode from being carelessly entered in a normal playing state.

[Brief description of drawings]

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

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

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

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

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

FIG. 6 is a diagram showing an example of a conversion table used in the embodiment of the present invention.

[Explanation of symbols]

 10 CPU 11 Program Memory 12 RAM 13 Panel Interface Circuit 14 Operation Panel 15 A / D Converter 16 Tempo Setting Volume 17 Keyboard Interface Circuit 18 Keyboard Device 19 Rhythm Performance Data Memory 20 Waveform Memory 21 Sound Source 22 D / A Converter 23 Amplifier 24 Speaker 30 System bus 110 Conversion table 140 Rhythm start switch 141 Rhythm selection switch 142 Up / down switch 142A Down switch 142B Up switch 143 Indicator

Claims (2)

[Claims] 1. An electronic musical instrument that has a system setting mode, which is an operation mode for setting parameters, and automatically performs rhythm performance based on previously prepared rhythm performance data, and specifies the tempo of the rhythm performance. And a system operator for instructing to move to the system setting mode, and when the system operator instructs to move to the system setting mode, the tempo specifying means specifies An electronic musical instrument characterized by comprising control means for shifting to a system setting mode if a tempo is designated. 2. The electronic musical instrument according to claim 1, wherein the specific tempo is a minimum tempo or a maximum tempo of a rhythm to be played.