JP3436636B2 - Automatic accompaniment device for electronic and electric musical instruments - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic accompaniment device used in electronic musical instruments such as synthesizers, electronic pianos, electronic organs, MIDI devices, etc., in which chord detection is temporarily suppressed during automatic accompaniment. An electronic function that allows you to play chords that you key in as chords.
The present invention relates to an automatic accompaniment device for electric musical instruments.

[0002]

2. Description of the Related Art Generally, an automatic accompaniment function provided in an electronic or electric musical instrument is a function for automatically generating a musical sound of each part such as a chord, a bass, a drum, etc. You can play it, for example, to play a melody.

The automatic accompaniment function is realized by preliminarily storing the automatic accompaniment data in the memory (ROM) and reading out the automatic accompaniment data from the memory according to the instructions of the performer or the data from the sequencer to generate sound. Has been done.

An automatic accompaniment device for detecting a chord in real time and playing, such as a digital piano having such an automatic accompaniment function, a single keyboard, an automatic accompaniment device connected to a MIDI musical instrument to perform an automatic accompaniment, is a one-finger or a finger. It is possible to set the code detection mode such as the key and full key.

However, in these conventional automatic accompaniment devices, although the chord detection mode such as the one finger or the fingert can be set, the performer temporarily suppresses the chord detection during the automatic performance, It has not been possible to arbitrarily set the time at which a note input by the performer is overlaid on the automatic accompaniment pattern that has been played so far.

For this reason, when a key is pressed or a full key is detected in the range below the limited split point, a chord is detected when the key is pressed. For example, when performing improvisation, an arbitrary time or an arbitrary measure. It was not possible to insert chords according to the player's preference into the chords that had been played until now, and to play them overlaid.

Therefore, the accompaniment sound of the conventional automatic accompaniment apparatus is fixed and there is no room for change, and the automatic accompaniment itself tends to be mechanical and monotonous, so that it is impossible to give expressive power to the accompaniment. Therefore, there has been a demand for an automatic accompaniment device capable of giving a free expressive power to the automatic accompaniment in consideration of a player's sense.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and suppresses chord detection at an arbitrary time or between arbitrary bars during automatic accompaniment. It is an object of the present invention to provide an automatic accompaniment device that allows an operator to perform a musical accompaniment pattern that has been played so far and to overplay a sound input by a player by operating a key.

[0009]

SUMMARY OF THE INVENTION The present invention provides an automatic accompaniment device for an electronic / electric musical instrument, which has a manual chord progression mode as an automatic accompaniment function, and sequentially reads stored musical tone information to perform automatic accompaniment. Before starting the performance, input the data to turn chord detection on / off with the editor and store it in the chord detection data memory. At the predetermined timing during the automatic accompaniment in the manual chord progression mode, it is written in the chord detection data memory. The code detection switching means for instructing on / off of the code detection based on the data, and the code detection control means for controlling the on / off of the code detection based on the setting of the code detection switching means. When the chord detection control means is off chord detection, the automatic accompaniment pattern that was pronounced immediately before the chord detection off instruction is continued to sound. In addition, it is configured so that the sound inputted by the performer can be overlaid and played.

The data stored in the code detection data memory according to the present invention is characterized in that it is written for each bar, beat number, and / or clock location.

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

The automatic accompaniment apparatus of the present invention suppresses chord detection for automatic accompaniment during an arbitrary fixed time during automatic accompaniment or between arbitrary bars, and immediately before the instruction to turn off chord detection is given. By imitating the auto-accompaniment pattern that has been sounded and by allowing keyed sounds to be played repeatedly, improvisational performance is possible.

Therefore, in the present invention, the chord detection changeover switch 3a as the chord detection changeover means 3a is provided on the panel or on the pedal, and the chord detection control means 21 is
The setting state of the code detection changeover switch 3a is detected, and on / off of code detection is controlled according to the setting state of the code detection changeover switch 3a.

At this time, the code detection control means 21 is
When the chord detection switching means 3a is on, normal automatic accompaniment is performed, but when the chord detection switching means 3a is off, the automatic accompaniment pattern sounded immediately before the chord detection switching means 3a is turned off is sounded. At the same time, the sound entered by the performer can be played repeatedly.

Thus, the performer can easily specify on / off of chord detection at any time during the automatic accompaniment or during any bar, and the designation can be reflected in real time. An easy-to-use and easy-to-use automatic accompaniment device can be provided.

Further, according to the present invention, since the control is performed according to the setting of the chord detection switching means 3a, it is possible to provide an automatic accompaniment apparatus having a simple structure and low cost. Further, if the chord detection switching means 3a is provided on the pedal, both hands can concentrate on the performance, so that the automatic accompaniment apparatus becomes easier to use.

Further, an editor is used as the chord detection switching means 3a, and the performer inputs the time or section during which chord detection is suppressed by the editor before the performance starts.

The data indicating ON / OFF of the code detection input by the code detection switching means 3a is stored in the RAM 13.
Stored in the code detection data memory 28 provided above,
At a predetermined timing, the data is read from the memory and the code detection is controlled.

As a result, during the performance, the chord detection control means 21 first reads the data stored in the chord detection data memory 28, performs normal automatic accompaniment when it is on, and suppresses chord detection when it is off. In addition, it enables repeated playing.

In this way, the performer can set the chord detection on / off before starting the performance, so that the detailed setting can be planned and the performer can concentrate on the performance during the performance. A simple automatic accompaniment device can be provided.

The present invention can also be applied to an automatic accompaniment device for an electronic or electric musical instrument having no keyboard.

Further, according to the present invention, the code detection switching means 3a.
As a key, the presence or absence of code detection is determined according to the velocity of each key detected by the touch sensor 2. For this reason, the code detection control means 21 stores a judgment criterion for judging ON / OFF of the code detection, and the ON / OFF of the code detection uses the velocity of each key detected by the touch sensor 2 as the judgment criterion. It is judged by comparison.

Then, the data to which the predetermined chord conversion is added based on the judgment result is stored in the automatic accompaniment pattern memory 27 on the RAM 13, and at a predetermined timing, the chord detection control means 21 causes the automatic accompaniment pattern memory 27. The automatic accompaniment data is read from and the automatic accompaniment is performed.

As a result, during the performance, the normal automatic accompaniment is performed when the chord detection is on, and the repeated performance is performed when the chord detection is off.

As a result, the player can freely control the on / off of the chord detection according to the strength with which the key is pressed, and the setting result can be reflected in real time. Can be provided.

Further, the performer does not have to worry that the chord will be detected because he or she repeatedly played a plurality of keys too quickly, and can enjoy improvisation with peace of mind. .

[0031]

1 is a block diagram showing a schematic configuration of an automatic accompaniment apparatus having a chord detection suppressing function of the present invention. The overall configuration of the automatic accompaniment apparatus of the present invention will be described below with reference to the drawings.

In the figure, 11 is a CPU, 12 is a ROM, and 13 is a RAM. Further, 1 is a keyboard, 2 is a touch sensor, 3 is an operation panel, 4 is a panel scan circuit, 5 is a tone signal generator, 6 is a waveform memory, and 7 is D / A.
A converter, 8 is an amplifier, and 9 is a speaker.

The CPU 11 controls the entire automatic accompaniment apparatus according to the control program stored in the program memory, and controls the chord detection as well as various other controls, and the detected keys. An accompaniment data converter 22 is provided for performing chord detection and chord conversion based on the above.

Connected to the CPU 11 are a ROM 12 for storing the basic form of the automatic accompaniment pattern data, a RAM 13 for storing the automatic accompaniment pattern data that has been code-converted based on whether chord detection is on or off, and a tone signal generation section 5 and the like. Has been done.

The control unit 21 provided in the CPU 11 is realized by software, and is a flag or data which is detected by a panel scan and is set in a predetermined area of the RAM 13 to indicate ON / OFF of code detection. Control code detection based on

Further, the control section 21 is read from the basic pattern memory 24, and the automatic accompaniment data conversion section 22.
Thus, the basic pattern data to which the required conversion is added is written to the automatic accompaniment pattern memory 27, and the data is read from the automatic accompaniment pattern memory 27 at a predetermined timing.

The automatic accompaniment data conversion unit 22 is also realized by software, and the keys that are simultaneously pressed at a predetermined timing based on the key information detected by the key scan under the control of the control unit 21. On the basis of,
First, the code of the input key is determined by referring to the code detection table 26.

Next, based on the determined chord, data indicating what kind of offset is applied to the basic form of the automatic accompaniment pattern is read from the chord conversion table 25, and the basic of the automatic accompaniment is read based on the data. The pattern is given a predetermined offset and sent to the control unit 21, and the control unit 21 stores this data in the automatic accompaniment pattern memory 27.

The ROM 12 has a code detection table 2 in addition to the control program for operating the CPU 11 described above.
6, a chord conversion table 25, a basic pattern memory 24 for storing basic pattern data for automatic accompaniment, and others,
It stores various fixed data.

The basic pattern memory 24 for automatic accompaniment is
For example, basic shapes of performance patterns for each music genre such as bossa nova and swing are stored by the number of built-in patterns.

Further, in the chord conversion table 25, data indicating what kind of offset is applied to the basic pattern of automatic accompaniment according to the detected chord type, such as C minor or D seven, is chord pattern. The number is remembered.

The chord detection table 26 also stores data for determining what chord is currently instructed by the external input according to the keys that are simultaneously pressed, and the automatic accompaniment data is stored. It is read by the conversion unit 22.

The RAM 13 is provided with an area for storing status information of the apparatus and a work area for the CPU 11, and various registers, counters, flags and the like for controlling the electronic musical instrument are defined. Also, the ROM 12
It has a data area in which necessary data among the data stored in is stored and temporarily stored.

The RAM 13 has an automatic accompaniment pattern memory 27, a chord detection data memory 28, a switch flag 29, and a velocity flag 30 which are directly related to the present invention.
Is provided.

The automatic accompaniment pattern memory 27 stores pattern data of an automatic accompaniment to be sounded next,
The automatic accompaniment pattern memory 27 stores the automatic accompaniment pattern data detected by the control unit 21 and the automatic accompaniment data conversion unit 22 and subjected to predetermined conversion.

The automatic accompaniment pattern data memory 27 stores a plurality of key information (key number), bar information, END mark, step time STEP, gate time GATE and velocity as one performance data unit. This is performance data.

Here, the key number KEY designates a pitch, and is a number assigned to each key of the keyboard 1. The bar information is information indicating the end of the bar. E
The ND mark is information indicating the end of performance data.

The step time STEP is information for designating a sounding time within a bar. The gate time GATE is information that specifies the time at which the sound should be generated. Velocity VELO is information that specifies the strength of the sound to be produced.

The chord detection data memory 28 is a memory used when the chord detection is controlled by the editor, and is a memory for storing data indicating chord detection ON / OFF inputted by the editor before the performance starts.

The memory 28 stores the timing of stopping or resuming the performance by address, bar number, beat number, clock location, or the like.

The code detection switch flag 29 is a flag for storing ON / OFF of the code detection changeover switch 3a, and is used when controlling the code detection ON / OFF using the code detection changeover switch 3a. To be done.

The chord detection velocity flag 30 is a flag for storing the key for which the velocity of the depressed key exceeds a predetermined strength and the chord detection is instructed to be turned off, and is used when the chord detection is controlled by the velocity. To be done.

In addition to this, the RAM 13 stores an area for storing an address indicating a position where the performance is currently performed, an area for storing the key number and velocity data of the currently pressed keyboard 1, and a detected code. Area, a area for storing a velocity value serving as a reference for code detection, an area for storing a key number of the keyboard 1 pressed with a velocity of a predetermined strength or more, and the like.

The keyboard 1 uses the key number as the key depression information for the CPU.
The key scanning circuit is composed of a plurality of keys and a key switch that opens and closes in conjunction with the key pressing / release operations of these keys. The signal detected by the CPU 11 is supplied to the tone signal generator 5 under the control of the CPU 11.

The touch sensor 2 sends a scan signal to the keyboard 1 to detect the strength (speed) of the key touch according to the signal from the keyboard 1, and indicates the pressed state of the keyboard 1. The data and the touch data indicating the strength of the key touch are formed from the signal indicating the open / closed state of the key switch received from the keyboard 1.

The signal formed by the touch sensor 2 is formed on the basis of the key number of the key pressed or released and the touch data indicating the speed of key depression or release, and the obtained velocity data is stored in the CPU 11. It is converted into a code detection ON / OFF signal by the control unit 21 and stored in the velocity flag 30 of the RAM 13.

Data transfer from the touch sensor 2 to the CPU 11 is performed by the touch sensor 2 to the CPU 11.
This is done by interrupting that there was a keyboard event.

The operation panel 3 is used to set tone color selection information, edit parameter selection information, edit data write request information, and the like. The operation panel 3 includes a power switch, a tone color selection switch, Various switches and indicators such as a melody selection switch, a rhythm selection switch, and an automatic accompaniment switch used for controlling start / stop of automatic accompaniment are provided.

The code detection changeover switch 3a directly related to the present invention is provided on the operation panel 3, and the mode set by the code detection changeover switch 3a is detected by panel scanning. RAM1
No. 3 code detection switch flag 29 is set.

Further, the code detecting changeover switch 3a.
As an independent switch, or as part of a rotary switch, for example, one finger,
It may be configured to be incorporated as part of a system switch in combination with a finger, a full key, or the like.

If the chord detecting changeover switch 3a is provided in the pedal portion, both hands can always concentrate on the performance.
The automatic accompaniment device is even easier to use.

The set / reset state of each switch of the operation panel 3 is detected by the panel scan circuit 4 included therein, and the data relating to the set state of the switch detected by the panel scan circuit 4 is stored in the control section. It is stored in a predetermined area on the RAM 13 under the control of 21.

Further, the operation panel 3 is provided with a display device (not shown), which is composed of, for example, one LED, and is used when inputting ON / OFF of code detection by an editor.

Further, the operation panel 3 includes a panel scan circuit 4 for detecting ON / OFF of various switches, and the switch ON / OFF of the switch detected by the operation panel 3 is included.
The signal indicating the off state is sent to the CPU 11 via the panel interface and stored in a predetermined area of the RAM 13.

Reference numeral 5 denotes a tone signal generator which reads tone waveform data and envelope data corresponding to the signal output from the CPU 11 from the waveform memory 6, adds the envelope to the read tone waveform data, and outputs the tone signal. It is a thing. The tone signal generator 5 includes a waveform memory 6 for storing waveform data and envelope data.
Are connected.

Reference numeral 6 is a tone waveform memory, which stores tone waveform data and envelope data corresponding to various tone colors and tone ranges. The tone waveform memory 6 is accessed by the tone signal generator 5 via the system bus.

Reference numeral 7 is a D / A converter which converts the input digital musical tone signal into an analog musical tone signal. The analog tone signal converted by the D / A converter 7 is supplied to the amplifier 8.

The amplifier 8 amplifies the tone signal supplied from the tone signal generator 5 with a predetermined gain and supplies it to the speaker 9.

The speaker 9 converts the input analog musical tone signal as an electric signal into an acoustic signal.
That is, the musical tone is emitted according to the generated musical tone signal. The speaker 9 emits a musical sound corresponding to the pressing of a key on the keyboard 1 and also an accompaniment in a designated manner.

In such a configuration, for example, when the performer turns on / off the chord detection changeover switch 3a during automatic accompaniment, the operation is detected by the panel scan circuit 4, and the detection result is also controlled by the control section 21. And the code detection switch flag 29 of the RAM 13 are set.

Therefore, during the performance, the control section 21 controls the automatic accompaniment data conversion section 22 based on the on / off of the chord detection read from the chord detection switch flag 29 at a predetermined timing, for example, chord detection is turned on. In this case, first, the code corresponding to the keys that are simultaneously pressed is read from the code detection table 26.

Subsequently, the automatic accompaniment data converter 22
Is a code type based on the detected code,
The code conversion table 25 stores data indicating what kind of offset is applied to the basic form of the automatic accompaniment pattern.
Read more.

The control unit 21 adds a required conversion to the basic pattern of the automatic accompaniment based on the read data, and overwrites it on the automatic accompaniment pattern memory 27 of the RAM 13. As a result, when the predetermined sounding timing is reached, the control section 21 sequentially reads out the data of the automatic accompaniment pattern memory 27 and sounds it.

On the other hand, when the read code detection switch flag 29 is off, the code detection changeover switch 3
The pattern data of the automatic accompaniment sounded immediately before the a is turned off is already stored in the pattern memory 27 of the automatic accompaniment. In the present invention, the data can be reproduced as it is. I don't know.

Therefore, the control unit 21 reads out the pattern data of the automatic accompaniment sounded immediately before the chord detection changeover switch 3a is turned off at a predetermined timing from the automatic accompaniment data memory 27 as it is and sounds it. Control is performed to generate a sound corresponding to a key input by a person to enable repeated playing.

[0076]

[0077]

[0078]

[0079]

[0080]

Next, the operation of the embodiment of the present invention having the above configuration will be described. FIG. 3 is a flowchart of the main routine showing the operation of the electronic musical instrument of the present invention.

When the power is turned on, first, initialization processing is performed (step S1). This initialization processing sets the internal state of the tone signal generator 5 to the initial state to prevent unnecessary sounds from being generated when the power is turned on, clears the working area of the RAM 13, registers, and flags. This is processing for initializing data such as volume, tone color, and the like.

Next, a keyboard scan process is performed (step S2). In this keyboard scanning process, data associated with key depression / key release of the keyboard 1 is fetched and stored in a predetermined area of the RAM 13. This stored data is used for the sound generation processing which will be performed later.

Then, a panel scan process is performed (step S3). This is a process such as switching the tone color from a piano to a guitar or switching the volume according to the setting of the panel switch, and the setting of the chord detecting changeover switch 3a of the present invention is detected by the panel scanning process.

Next, other processing is performed (step S
4). That is, the on / off information of the key obtained by the keyboard scanning process of step S2 and the on / off information obtained by the panel scanning process of step S3 are RAM1.
No. 3, which is stored in No. 3, and in other processing, sounding processing and mute processing based on the on / off information are performed. In addition, M
The processing and the like associated with the connection of the IDI device are performed in the "other processing".

Then, it is checked whether or not the performance has ended (step SS5). The control unit 21 checks the end of the performance.
Is detected by detecting an end mark indicating the end of the song of the chord progression data, or by detecting the turning off of an automatic accompaniment start switch (not shown).

If it is determined in step S5 that the performance has not ended, the process returns to step S2, and the processing described in the above description is repeated.

By repeating the steps of the main routine as described above, a desired performance is performed by the electronic musical instrument in response to the operation of the keyboard 1 and the operation of the operation panel 3.

Next, the operation of the panel processing of the first embodiment of the present invention in which the code detection changeover switch 3a controls the ON / OFF of the code detection will be described with reference to the flowchart of FIG. In this embodiment, the code detection is not performed when the code detection changeover switch 3a is off.

In the panel scan process, panel scan is performed (step S11). In this panel scan, first, the panel scan circuit 4 of the operation panel 3
The signal indicating the ON / OFF state of each switch detected in step S6 is fetched by the CPU 11 via the panel interface and stored in a predetermined area of the RAM 13.

Then, the on / off state of each switch which has been fetched from the operation panel 3 last time (which is already stored in another area of the RAM 13) and the on / off state of each switch which has been fetched from the operation panel 3 this time are set. By comparison, an event map in which only the bit corresponding to the newly turned on switch is set is created in the RAM 13.

Then, it is checked whether or not the automatic accompaniment is being performed (step S12). This is performed by the control unit 21 checking the mode flag indicating that automatic accompaniment is in progress. The mode flag is set based on ON / OFF of the automatic accompaniment start switch.

When the mode flag is off, that is, when the automatic accompaniment is not in progress, it is subsequently checked whether or not the automatic accompaniment switch is turned on (step S13). If the automatic accompaniment switch is not turned on, the automatic accompaniment has not been performed yet, so the process returns to step S11 and the same processing is repeated thereafter.

On the other hand, if the automatic accompaniment switch is turned on in step S13, the automatic accompaniment switch is newly turned on and the start of performance is instructed. Therefore, the mode flag indicating that automatic accompaniment is in progress is turned on, and the performance is started. A flag is set at the address indicating the position (step S14), and then step S
Proceed to 16.

On the other hand, if the mode flag is on in step S12, which indicates that automatic accompaniment is already in progress, the flag is advanced from the current sound generation position to the next sound generation position (step S15).

Then, it is checked whether or not there is a change in the depressed key (step S16). This is performed by searching the key data fetched by the keyboard scanning process performed in step S2 of the main routine to check whether the key event has been changed.

As a result, when there is no change in the depressed key, there is no change in the chord during the performance, and since it is sufficient to continue the performance with the previous chord pattern, the process directly returns to the main routine.

On the other hand, when there is a change in the depressed key, that is, when there is a change in the auto accompaniment chord to be pronounced, the process proceeds to step S17, and the chord detection changeover switch 3
It is checked whether or not a is off (step S1).
7).

This is determined by checking the code detection flag indicating the setting state of the code detection changeover switch 3a captured by the panel scan. If the code detection changeover switch 3a is off, the code detection suppression mode is set.

Therefore, with the automatic accompaniment pattern that is being played immediately before the chord detection changeover switch 3a is turned off and already stored in the automatic accompaniment pattern memory 27, for example, a key newly input for improvisational performance. It is necessary to pronounce the sound according to.

Therefore, the performance data corresponding to the key input by the key input is read out, expanded in a predetermined area (not shown) of the RAM 13 (step S18), and the process returns to the main routine.

As a result, the musical tone signal generator 5 sequentially reads the automatic accompaniment pattern data stored in the automatic accompaniment pattern memory 27 at a predetermined timing of sound generation in the other processing of step S4 of the main routine. , The musical tone data which is key-in and expanded in a predetermined area of the RAM 13 is read out to enable the overplay.

On the other hand, when the chord detection changeover switch 3a is turned on in step S17, it means the conventional automatic accompaniment mode. Therefore, first, the data such as the note number of the detected key is stored in a predetermined area (not shown) of the RAM 13. It is stored (step S19).

Next, the automatic accompaniment data converter 22 refers to the chord detection table 26 on the basis of the note number of the key rewritten in step S19, and determines the chord based on the simultaneously pressed keys (step S20). ).

Further, based on the decided chord, the chord conversion table 25 is referred to, which offset is to be applied to the basic pattern of the automatic accompaniment, and the basic pattern stored in the basic pattern memory 24 is set. A predetermined conversion is applied, and this is stored in the automatic accompaniment pattern memory 27 of the RAM 13 (step S21), and the process returns to the main routine.

As a result, the musical tone signal generating section 5 sequentially reads the automatic accompaniment pattern data stored in the automatic accompaniment pattern memory 27 at a predetermined timing of sound generation in the other processing of step S4 of the main routine. Make it sound.

As described above, according to this embodiment, the chord detection changeover switch 3a can be stopped or restarted by a simple operation to operate the chord detection switch 3a, which is suitable for improvisational performance and has a simple structure and is easy to handle and inexpensive. Thus, it is possible to provide an automatic accompaniment device for electronic and electric musical instruments that is easy for beginners to use.

The code detection changeover switch 3a is used.
By providing a pedal or a foot switch, the player can concentrate both hands for playing the melody, and the automatic accompaniment device becomes easier to handle.

Next, data for turning on / off the chord detection is input by the editor before the performance starts, and during the performance, the chord detection on / off is automatically controlled based on the input data. The operation of the panel processing of the embodiment will be described with reference to the flowchart of FIG.

In the panel scan processing, panel scan is first performed (step S31). In this panel scan, first, a signal indicating the on / off state of each switch detected by the panel scan circuit 4 of the operation panel 3 is fetched by the CPU 11 via the panel interface and stored in a predetermined area of the RAM 13. .

Then, the ON / OFF state of each switch (previously stored in another area of the RAM 13) fetched from the operation panel 3 last time and the ON / OFF state of each switch fetched from the operation panel 3 this time are set. By comparison, an event map in which only the bit corresponding to the newly turned on switch is set is created in the RAM 13.

Then, it is checked whether or not the edit mode is set (step S32). This is to check whether or not the switch of the editor (not shown) is turned on by checking the event map. If not in the edit mode, the process directly branches to step S35.

On the other hand, if the edit mode is selected in step S32, the code detection stop address and the code detection restart address are input by the editor, and this is input to the RAM 13
It is stored in the code detection data memory 28 (step S33, step S34). Note that the stop or restart position of the chord detection may be input by a bar, a beat number, or clock data.

Next, it is checked whether or not the automatic accompaniment is being performed (step S35). This is performed by the control unit 21 by checking whether the address to be sounded next is between the code detection stop address and the code detection restart address.

As a result, when the automatic accompaniment is not being performed, it is subsequently checked whether or not the automatic accompaniment switch is turned on (step S36). If the automatic accompaniment switch is not on, the automatic accompaniment has not been performed yet, so step S
The process returns to step 31 and waits for a new input while repeating the same processing.

On the other hand, when the automatic accompaniment switch is turned on in step S36, since there is a new on event of the automatic accompaniment switch this time and the performance start is instructed, the mode flag indicating that the automatic accompaniment is being performed is turned on. And set an address indicating the performance start position (step S37),
It proceeds to step S39.

On the other hand, if the mode flag is turned on in step S35, which indicates that automatic accompaniment is already in progress, the address is advanced by one from the current sound generation position to the next sound generation position (step S38).

Subsequently, it is checked whether or not the depressed key has been changed (step S39). This is performed by searching the key data fetched by the keyboard scanning process performed in step S2 of the main routine to check whether the key event has been changed.

As a result, the automatic accompaniment chord does not change unless the pressed key is changed. Therefore, it is sufficient to continue playing with the automatic accompaniment pattern that has been played until now. Without updating
It returns to the main routine as it is.

On the other hand, if there is a change in the keys pressed simultaneously in step S39, it is checked whether or not the position of the data to be sounded next corresponds to the chord detection stop position (step S40).

This means that the control unit 21 determines whether the position of the data to be sounded next is between the code detection stop position and the code detection restart position which are input by the editor and already stored in the code detection data memory 28. It is done by checking whether or not.

As a result, in the case where the chord detection is off, in the present invention, the performance is performed immediately before the chord detection is turned off, the automatic accompaniment pattern already stored in the automatic accompaniment pattern memory 27 is sounded, and a new one is newly generated. It is necessary to repeat the sound corresponding to the key input.

Therefore, the performance data corresponding to the newly input key is read out, expanded in a predetermined area (not shown) of the RAM 13 (step S41), the preparation for the repeated performance is made, and the process returns to the main routine.

As a result, the musical tone signal generating section 5 sequentially reads the automatic accompaniment pattern data stored in the automatic accompaniment pattern memory 27 at a predetermined timing of sound generation in the other processing of step S4 of the main routine. , The musical tone data which is key-in and expanded in a predetermined area of the RAM 13 is read out to enable the overplay.

On the other hand, when the chord detection is turned on in the above step S40, since the normal automatic accompaniment mode is set, the data such as the note number of the key detected by the key scan is stored in a predetermined area (not shown) of the RAM 13 (step S42).

Next, the automatic accompaniment data converter 22 refers to the chord detection table 26 based on the note number of the key rewritten in step S42, and determines the chord based on the simultaneously pressed keys (step S43). ).

Subsequently, the basic pattern stored in the basic pattern memory 24 is determined by referring to the chord conversion table 25 based on the decided chords to determine what offset is to be applied to the basic pattern of automatic accompaniment. Is subjected to a predetermined conversion, stored in the automatic accompaniment pattern memory 27 of the RAM 13 (step S44), and the process returns to the main routine.

As a result, the musical tone signal generating section 5 sequentially reads the automatic accompaniment pattern data stored in the automatic accompaniment pattern memory 27 at a predetermined sounding timing in the other processing of step S4 of the main routine. Make it sound.

As described above, according to this embodiment, the player operates the editor to set the timing for suppressing the chord detection before the performance is started, so that the chord can be detected finely as the music progresses. It is possible to provide an easy-to-use automatic accompaniment apparatus because the suppression can be set and there is no need to instruct whether or not chord detection is required during performance.

The automatic accompaniment apparatus according to the first and second embodiments can be applied to an electric musical instrument having no keyboard.

Next, the operation of the panel processing of the third embodiment for controlling the on / off of the chord detection by the velocity of the key pressed during the performance will be described with reference to the flowchart of FIG.

In the panel scan processing of this embodiment, first, the panel scan is performed (step S6).
1). In this panel scan, first, each switch detected by the panel scan circuit 4 of the operation panel 3 is turned on / off.
A signal indicating the off state is fetched by the CPU 11 via the panel interface and stored in a predetermined area of the RAM 13.

Then, the ON / OFF state of each switch that has been fetched from the operation panel 3 last time (which has been already stored in another area of the RAM 13) and the ON / OFF state of each switch that has been fetched from the operation panel 3 this time are set. By comparison, an event map in which only the bit corresponding to the newly turned on switch is set is created in the RAM 13.

Next, it is checked whether or not the mode is the velocity reference value input mode (step S62). this is,
By checking the event map, it is checked whether or not a reference value input switch (not shown) is turned on. If not in the reference value input mode, the process directly branches to step S64.

On the other hand, in the case of the reference value input mode in step S62, the velocity as the reference for controlling the on / off of the code detection is input by the editor, and this is input to RA.
It is stored in a predetermined area of M13 (step S63).

Next, it is checked whether or not the automatic accompaniment is being performed (step S64). This is performed by the control unit 21 checking whether or not the mode flag indicating that the automatic accompaniment is currently performed is turned on.

As a result, when the automatic accompaniment is not being performed, it is subsequently checked whether or not the automatic accompaniment switch is turned on (step S65). If the automatic accompaniment switch is not on, the automatic accompaniment has not been performed yet, so step S
Returning to step 61, the same processing is repeated thereafter and waits for a new input.

On the other hand, if the automatic accompaniment switch is turned on in step S65, since there is a new on event of the automatic accompaniment switch this time and the performance is started, the mode flag indicating that the automatic accompaniment is being performed is turned on, A flag indicating the performance start position is set (step S66), and the process proceeds to step S68.

On the other hand, if the mode flag is on in step S64, which indicates that automatic accompaniment is already in progress, the flag is advanced by one from the current sound generation position to the next sound generation position (step S67).

Then, it is checked whether or not the depressed key is changed (step S68). This is performed by searching the key data taken in the keyboard scanning process performed in step S2 of the main routine to check whether the key event has been changed.

As a result, when there is no change in the pressed key, there is no change in the chord for automatic accompaniment, and it is sufficient to continue playing as it is, and the process returns to the main routine.

On the other hand, if the key pressed in step S68 is changed, the velocity of the velocity exceeding the reference value for instructing the chord detection on the note number keyed in to indicate the data to be sounded next. It is checked whether or not there is a key input (step S69).

This is carried out by the control unit 21 by checking whether or not there is a velocity newly detected by the touch sensor 2 that has been input by a key and exceeds the velocity reference value.

It should be noted that the procedure for judging whether the code detection is on or off is as follows.
There is a method to judge that the code detection is turned on when all of them exceed the reference value, or to judge that the code detection is turned on when all the keys pressed at the same time exceed the reference value. Good.

As a result, when the code detection is off, that is,
When the velocity of the newly input key does not reach the reference value, the chord detection is off and the automatic accompaniment pattern that has been played immediately before and is already stored in the automatic accompaniment pattern memory 27 is played. At the same time, it is necessary to generate a sound corresponding to the key newly input.

Therefore, the performance data corresponding to the newly input key is read, expanded in a predetermined area (not shown) of the RAM 13 (step S70), and the process returns to the main routine.

As a result, the musical tone signal generator 5 sequentially reads the automatic accompaniment pattern data stored in the automatic accompaniment pattern memory 27 at a predetermined timing of sound generation in the other processing of step S4 of the main routine. , The musical tone data which is key-in and expanded in a predetermined area of the RAM 13 is read out to enable the overplay.

On the other hand, when the chord detection is turned on in the above step S69, the normal automatic accompaniment mode is set, so that the data such as the note numbers which are simultaneously pressed and key-input beyond the reference velocity is stored in the RAM 13 at a predetermined not shown. Is stored in the area (step S71).

Next, the automatic accompaniment data conversion section 22 refers to the chord detection table 26 based on the note number of the key updated in the above step S71, and determines the chord based on the simultaneously pressed keys (step S7).
2).

Subsequently, the basic pattern memory 2 is referred to by referring to the code conversion table 25 based on the determined code.
It is determined what offset is to be applied to the basic pattern of the automatic accompaniment stored in No. 4, the predetermined conversion is applied to the basic pattern, and this is stored in the automatic accompaniment pattern memory 27 of the RAM 13 (step S73). , Return to the main routine.

As a result, the musical tone signal generating section 5 sequentially reads the automatic accompaniment pattern data stored in the automatic accompaniment pattern memory 27 at a predetermined sounding timing in the other processing of step S4 of the main routine. Make it sound.

As described above, according to the present invention, when the velocity of the key input by the key during the automatic accompaniment does not reach the predetermined reference value, the detection is suppressed and immediately before the chord detection is suppressed. The automatic accompaniment device capable of improvisational performance can be provided, because the automatic accompaniment pattern that has been played at the same time can be played, and the overplay can be performed as it is by the sound based on the note number of the key entered.

Furthermore, since the on / off of chord detection is automatically controlled according to the velocity with which the key is pressed, the performer does not need an operation for chord detection and can concentrate on the performance. . Moreover, the reference value for code detection can be set freely.

In step S71, only the data of the key input exceeding the reference value is rewritten, and in step S72, the code detection based on the key exceeding the reference value is performed. The code detection may be turned on when even one of the simultaneously pressed keys exceeds the reference value, and at this time, all the simultaneously pressed keys may be rewritten.

Further, in this embodiment, the case where the code detection is turned off when the velocity does not reach the reference value and the code detection is turned on when the velocity exceeds the reference value has been described as an example. The code detection may be turned on when the reference value is not reached, and the code detection may be turned off when the reference value is exceeded.

Further, in each of the above-mentioned embodiments, the case where the code detection is controlled by the switch, the case where it is preset by the editor, and the case where the code is controlled by the velocity are independently controlled. However, the present invention is not limited to this.

If any two or more of the above embodiments are combined, an automatic accompaniment device having more flexible and variety of functions can be obtained.

[0158]

As described in detail above, according to the present invention,
Since the performer can perform the automatic accompaniment pattern that was played immediately before without performing chord detection during automatic accompaniment, and can set the mode that allows the performer's key input notes to be played repeatedly. Improvisational performance with rich expressiveness is possible.

Moreover, since the timing of chord detection suppression start and chord detection restart can be freely set, it is possible to provide an automatic accompaniment device for an electronic / electric musical instrument which is easy to use and expresses the feeling of the player.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing an overall configuration of an automatic accompaniment apparatus according to the present invention.

FIG. 2 is a diagram illustrating a structure of chord progression data.

FIG. 3 is a main flowchart explaining the overall operation of the automatic accompaniment apparatus of the present invention.

FIG. 4 is a flowchart illustrating an operation of panel processing according to the first embodiment.

FIG. 5 is a flowchart illustrating an operation of panel processing according to a second embodiment.

FIG. 6 is a flowchart illustrating an operation of panel processing according to a third embodiment.

[Explanation of symbols]

1 keyboard 2 touch sensor 3 operation panel 3a code detection changeover switch (code detection changeover means) 4 panel scan circuit 5 tone signal generation section 6 waveform memory 7 D / A converter 8 amplifier 9 speaker 11 CPU 12 ROM 13 RAM 21 control Section (chord detection control means) 22 automatic accompaniment data conversion section 24 basic pattern memory 25 chord conversion table memory 26 chord detection table memory 27 auto accompaniment pattern memory 28 chord detection data memory 29 chord detection switch flag 30 chord detection velocity flag

Continuation of the front page (56) Reference JP-A-4-46394 (JP, A) JP-A-5-94178 (JP, A) JP-A-54-4116 (JP, A) JP-A-9-6359 (JP , A) JP-A-7-64560 (JP, A) JP-A-7-64557 (JP, A) JP-A-52-72215 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) G10H 1/00-7/12

Claims (2)

(57) [Claims] 1. An automatic accompaniment device for an electronic / electrical musical instrument, which has a manual chord progression mode as an automatic accompaniment function and sequentially reads stored musical tone information to perform automatic accompaniment. When the data for turning the detection on / off is input and stored in the chord detection data memory, and when a predetermined timing is reached during the automatic accompaniment in the manual chord progression mode, chord detection is performed based on the data written in the chord detection data memory. A code detection switching means for instructing on / off, and a code detection control means for controlling on / off of code detection based on the setting of the code detection switching means. At this time, the auto accompaniment pattern that was pronounced immediately before the chord detection off instruction was continued and the performer entered a key. An automatic accompaniment device for electronic and electric musical instruments, which is capable of playing multiple sounds. 2. The automatic accompaniment device for an electronic / electric musical instrument according to claim 1, wherein the data stored in the chord detection data memory is written for each measure, beat number, and / or clock location. .