JP2580746Y2 - Electronic wind instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to control of automatic accompaniment in an electronic wind instrument.

[Conventional technology]

The electronic wind instrument delicately controls the volume or pitch of electronically generated musical sounds by detecting a human breath operation or lip operation as an electric signal by a breath sensor or a lip sensor provided at a blower portion. This is an electronic musical instrument that can generate musical sounds that match the sensitivity of the player.

In an electronic wind instrument, a pitch specifying switch group is arranged at a position where a player can easily touch his finger, and the player can change one pitch (pitch) in one operation by a combination of pressing of the plurality of switches. specify.

Some electronic keyboard instruments have an automatic accompaniment function. The automatic accompaniment function is a function in which a rhythm sound, a bass sound, and a chord sound (chord) are automatically played according to an accompaniment pattern set in advance by a program or the like.

To apply such an automatic accompaniment function to an electronic wind instrument, a switch for inputting a program of an automatic accompaniment pattern, a display device for displaying input program data, and a memory for storing the program-inputted automatic accompaniment pattern It is conceivable to provide such as.

[Problems to be solved by the invention]

However, since the electronic wind instrument has a small mounting space due to its shape, it is difficult to provide the switch, the display device, the memory, and the like in the electronic wind instrument main body, and the automatic accompaniment function cannot be realized.

Also, in automatic accompaniment of an electronic keyboard instrument, a backing such as a rhythmic background (background based on a rhythm sound) and a harmonic background (background based on harmony progression) and a bass sound are automatically performed according to a preset accompaniment pattern. Therefore, there is a disadvantage that the accompaniment becomes monotonous.

To compensate for this monotonicity, there is an improvised background which has a fill-in function, but only the fill-in function changes only a part of the accompaniment pattern.

An object of the present invention is to enable automatic accompaniment in an electronic wind instrument and to enable a player to freely change a harmonic background in the automatic accompaniment during performance.

[Means for solving the problem]

In order to solve the above problems, the electronic wind instrument of the present invention has the following configuration.

A chord designation means for designating a chord by a chord designation operation,
For example, the tubular instrument main body is provided at a position where a player can easily attach a finger, and a sensor means for detecting a breath performance with respect to the blow section is provided, for example, inside a blow section connected to the upper end of the musical instrument body.

Next, there are provided an accompaniment pattern storage means for storing an accompaniment pattern composed of, for example, a rhythm pattern and a base pattern, and an accompaniment pattern reading means for reading out the accompaniment pattern stored in the accompaniment pattern storage means.

Further, a mode switching means for selectively switching between the automatic performance mode and the breath performance mode is provided, for example, at a position on the musical instrument main body where a player can easily touch his finger.

Further, when the automatic performance mode is selected by the mode switching means, the chord designated by the chord designation means is sequentially generated according to the accompaniment pattern read by the accompaniment pattern reading means, and the mode switching means When the breath performance mode is selected, there is provided control means for controlling the generation of the chord designated by the chord designation means in accordance with the breath operation detected by the sensor means.

[Action]

In the wind instrument as described above, the player selects one of the automatic performance mode and the breath performance mode by the mode switching means. Then, a harmonic background is played while a desired chord is designated by operating the chord designation means.

When the automatic performance mode is selected, the accompaniment pattern reading means reads an accompaniment pattern designated by, for example, a switch operation.

Further, in the automatic performance mode, the control means generates a chord designated by the chord designation means at a timing corresponding to the accompaniment pattern read by the accompaniment pattern reading means.

Thus, when the automatic performance mode is selected by the mode switching means, the chords designated by the chord designation means are sequentially generated according to the accompaniment pattern read by the accompaniment pattern reading means.

On the other hand, when the breath performance mode is selected by the mode switching means, the accompaniment pattern reading means reads the accompaniment pattern in the same manner as in the automatic performance mode.
The control means generates a chord designated by the chord designation means at a timing corresponding to the breath operation detected by the sensor means.

As described above, when the breath performance mode is selected by the mode switching means, the chords designated by the chord designation means are sequentially generated in accordance with the breath operation detected by the sensor means.

Therefore, when the automatic performance mode is selected by the mode switching means, the harmonic background sound in the automatic accompaniment is played according to a preset accompaniment pattern, and when the breath performance mode is selected, the player A harmonic background sound is played according to the breathing operation performed.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail.

FIG. 1 is a system configuration diagram of an embodiment.

The pitch specifying switch group 1 includes a plurality of switches for specifying a pitch, and each pitch is specified by a combination of pressed switches (turned on).

The timbre / effect switch group 2 is a switch for selecting a timbre of a musical tone and selecting whether or not to add various effects to the musical tone.

Further, the first mode changeover switch 3 is a switch for selecting a normal mode for performing a normal performance or an automatic accompaniment mode for performing automatic accompaniment. When the first mode changeover switch 3 is turned on (connected to the ground side), When the automatic accompaniment mode is selected and turned off (connected to the power supply _VDD side), the normal mode is selected.

The second mode changeover switch 4 is a switch for selecting whether to play the automatic accompaniment in the automatic performance mode or the breath performance mode when the automatic accompaniment mode is selected. When 4 is turned on (connected to the ground side), the breath performance mode is selected, and when turned off (connected to the power supply _VDD ), the automatic performance mode is selected. In the breath performance mode, the backing pattern of the chord (chord) changes according to the breath operation performed by the player. In the automatic performance mode, a rhythm sound and a base sound are performed in accordance with an accompaniment pattern or the like stored in the pattern storage device 6 in synchronization with a tempo clock generated by the automatic accompaniment control clock generation circuit 8. The chord sound specified by the operation of the pitch specifying switch group 1 is also played in synchronization with the tempo clock.

The accompaniment control switch group 5 includes a start / stop switch 5a for instructing start / stop of automatic accompaniment, and a fill-in switch 5b for instructing whether or not to perform accompaniment based on a fill-in pattern.

The pattern storage device 6 stores an accompaniment pattern played during automatic accompaniment and a fill-in pattern.
(Read only memory), and the accompaniment pattern selection switch 7 is a switch for selecting one accompaniment pattern from a plurality of accompaniment patterns stored in the pattern storage device 6.

Further, the automatic accompaniment control clock generation circuit 8 is a clock generator that generates a tempo clock for determining the tempo of the automatic accompaniment.

The CPU 12 reads out the contents of the accompaniment pattern stored in the pattern storage device 6 and uses the tempo clock input from the automatic accompaniment control clock generation circuit 8 to adjust the rhythm according to the rhythm pattern stored in the accompaniment pattern while taking sounding timing. The sound information is output to the rhythm / bass sound generation circuit 13.

The breath sensor 9 is a sensor that senses the strength of the breath that blows through the opening of the main body of the electronic wind instrument, and the sensing information of the breath sensor 9 is converted into a voltage corresponding to the sensing information by a voltage detection circuit 10. / D converter 11 The A / D converter 11 converts the applied voltage into, for example, 8-bit digital data (breath data) and outputs the digital data to the CPU 12.

The CPU (central processing unit) 12 is composed of, for example, a microprocessor, and the status (on / off state) of the first mode switch 3 and the second mode switch 4.
Is read at predetermined time intervals, and it is determined from the read status information whether the currently selected mode is the normal mode or the automatic accompaniment mode, and whether the automatic accompaniment mode is the automatic play mode or the breath play mode. doing.

Further, the CPU 12 reads each status (on / off state) of the pitch designation switch group 1 at a predetermined time interval, and from the read status information in the normal mode,
The pitch designated by the pitch designation switch group 1 is determined. Then, when the designation of the pitch has changed, pitch information for generating a tone having the newly designated pitch is output to the tone generation circuit 15. In the automatic accompaniment mode, pitch information (chord information) of each constituent tone of a chord (chord) is created from the status information of the pitch designation switch group 1;
Output to the tone generation circuit 15.

Further, the CPU 12 also reads the statuses of the tone / effect switch group 2 at predetermined time intervals, and determines the effect to be added to the designated tone or tone from the read status information. Then, the timbre information for generating the designated timbre is output to the tone generator 15 and the type of the effect to be added to the tone is stored in a storage area (not shown) in the CPU 12.

The CPU 12 also reads the status of the accompaniment control switch group 5 and the accompaniment pattern selection switch 7 at predetermined time intervals, and if it determines that the start / stop switch 5a of the accompaniment control switch group 5 is on (ON), The selected accompaniment pattern is determined based on the status information of the accompaniment pattern selection switch group 7, and the selected accompaniment pattern is read out from the pattern storage device 6,
The rhythm sound information and the base sound information corresponding to the accompaniment pattern are output to the rhythm sound / base sound generation circuit 13 while taking the rhythm sound generation timing from the tempo clock added from the automatic accompaniment control clock generation circuit 8.

The rhythm sound / bass sound generating circuit 13 is a circuit that generates a rhythm sound and a base sound according to the rhythm sound information / bass sound information added from the CPU 12 and adds the rhythm sound and the base sound to the musical sound output unit 15.

Further, based on the tone color information and pitch information added from the CPU 12, the tone generation circuit 14 generates a single tone or a chord designated by the pitch designation switch group 1 with the tone / effect designated by the tone / effect designation switch group 2. When the key-on information is added from the CPU 12, the generation of a single tone or a chord is started. The single tone or chord output from the tone generator 14 is applied to the tone output unit 15.

The tone output unit 15 includes an amplifier circuit 15-1 and a speaker 15-2.
The tone and chord added from the tone generator 14 are emitted as voice. The rhythm sound / bass sound generation circuit 13
The rhythm sound and bass sound added from the sound are emitted as voice.

Next, FIGS. 2 (a) to 2 (d) are external views of an electronic wind instrument realized by the embodiment of FIG. As shown in the figure, the present embodiment has the shape of a wind instrument comprising a tubular tubular portion 21 and a blow-off portion 22, and has a pitch designation switch group 1 and a timbre / effect switch group 2 described with reference to FIG. The first mode changeover switch 3, the second mode changeover switch 4, the accompaniment control switch group 5, and the accompaniment pattern selection switch group 7 are arranged at positions on the tubular tube portion 14 where the player can easily attach his / her finger. I have.

Further, the breath sensor 9 shown in FIG. 1 is provided in the vicinity of the connection position between the outlet 22 and the tubular tube 21.

Components other than those shown above in FIG. 1 are installed inside the tubular tube portion 21 in FIG.

Description of Operation The operation of the embodiment having the configuration shown in FIGS. 1 and 2 will be described below. 1 and 2 unless otherwise specified.

First, the schematic operation of the embodiment of the present invention will be described.

First, the player operates the first mode switch 3 to select either the normal mode or the automatic accompaniment mode. When the first mode switch 3 is turned off, the normal mode is selected.

In the normal mode, a desired tone and an effect to be added to a musical tone are designated by operating the tone / effect switch group 2. The CPU 12 monitors the operation contents of the switch group 2 at predetermined time intervals by a predetermined program (not shown), and when the CPU 12 detects that the setting contents have been changed, the tone / effect designated by the switch operation. Is output to the tone generation circuit 14. As a result, the same circuit 14
Generates a tone of a specified tone color and changes its internal state so that a specified effect is added.

Next, the performer starts the performance by blowing his / her breath from the outlet 22 while operating the pitch designation switch group 1 with a finger to designate the pitch of the musical tone. In this case, the CPU 12 monitors the operation state of the pitch designation switch group 1 at predetermined time intervals, and when detecting that the designated content has been changed,
Based on the read status of the pitch specifying switch group 1, pitch information is generated to generate a tone having a pitch specified by the player, and is output to the tone generating circuit 14. Thereby, the tone generation circuit 14 sets a pitch (scale) so that a tone having the designated pitch is generated.

On the other hand, the intensity of the breath blown from the outlet 22 is sensed by the breath sensor 9 and passed through the voltage detection circuit 10 and the A / D converter 11 as digital breath data to the CPU 12.
However, when the breath data exceeds a predetermined value, that is, when the player breathes in a certain strength or more, the CPU 12 outputs key-ON information to the tone generation circuit 14, thereby outputting the tone. The generation circuit 14 starts generating a musical tone at the tone and pitch designated by the above operation. Conversely, when the performer stops breathing into the air outlet 15 and the breath data falls below a predetermined value, the CPU 3 outputs key-off information to the musical sound generation circuit 14, thereby generating a musical sound. The circuit 14 stops generating a tone.

The tone generated by the tone generator 14 is amplified by the tone output unit 15 and emitted as voice.

In the normal mode, by operating the accompaniment pattern selection switch group 7 and the start / stop switch 5a of the accompaniment control switch group 5, automatic accompaniment is performed with a desired rhythm pattern stored in the pattern storage device.

When the CPU 12 reads the status of the start / stop switch 5a and determines that the start / stop switch 5a is on, it reads the status of the accompaniment pattern selection switch group 7 and corresponds to the selection pattern switch that is on. The rhythm sound information corresponding to the accompaniment pattern is output to the rhythm sound / bass sound generation circuit 13 while taking a sounding timing by the tempo clock applied from the automatic accompaniment control clock generation circuit 8. The rhythm sound / bass sound generation circuit 14 generates a rhythm sound based on the added rhythm sound information and supplies the rhythm sound to the musical sound output unit 15. The musical sound output unit 15 amplifies the added rhythm sound and emits it as voice (auto rhythm).

When the start / stop switch 5a is turned on and the auto rhythm is emitted in the normal mode as described above, the CPU 12 executes the fill-in switch 5b.
Is read, and if it is determined that the fill-in switch 5b is turned on, fill-in pattern information corresponding to the rhythm pattern currently being emitted is read from the pattern storage device 6, and rhythm sound information based on the fill-in pattern information is read out. The rhythm sound / bass sound generation circuit
Output to 13. The rhythm sound / bass sound generation circuit 13 generates a rhythm sound according to the added rhythm sound information, and the rhythm sound is emitted from the musical sound generation circuit 14 as a sound.

On the other hand, when the first mode switch 3 is turned on, the automatic accompaniment mode is selected.

In the automatic accompaniment mode, the player operates the second mode selection switch 4 to select either the automatic performance mode or the breath performance mode.

The CPU 12 reads the status of the second mode changeover switch 4 and, if the second mode changeover switch 4 is off, judges that the automatic performance mode is designated.

In this automatic performance mode, the player operates the accompaniment pattern selection switch group 7 to select a desired accompaniment pattern.

Further, the user operates the pitch designation switch group 1 to designate a desired chord. For example, the chord of a predetermined chord is designated by operating the pitch designation switch group 1 to designate the chord root chord and the chord chord type (major chord, minor chord, etc.).

When the start / stop switch 5b of the accompaniment control switch group 5 is turned on, a rhythm sound, a bass sound, and a chord sound corresponding to the specified accompaniment pattern are emitted from the musical sound output unit 15.

More specifically, the CPU 12 reads the status of the start / stop switch 5a in the automatic performance mode, and when it is determined that the start / stop switch 5a is turned on, reads the status of the accompaniment pattern selection switch group 7 and specifies the status. The determined accompaniment pattern is read out from the pattern storage device 6. Then, while synchronizing with the tempo clock added from the automatic accompaniment control clock generation circuit 8,
The rhythm pattern information corresponding to the read accompaniment pattern is added to the rhythm sound / bass sound generation circuit 13. Further, the status of the pitch designation switch group 1 is read out, and at the time of the sounding timing of the rhythm sound specified by the read-out accompaniment pattern, it is determined whether or not a chord is designated by operating the pitch designation switch group 1 and the chord is designated. If so,
The pitch information (chord information) of each component sound of the designated chord and the pitch information of the bass sound are created. Then, the chord information is output to the tone generation circuit 14 and the pitch information of the rhythm sound and the bass sound is output to the rhythm / bass sound generation circuit 14.

Accordingly, in the automatic performance mode of the automatic accompaniment mode, the chord specified by the operation of the pitch specifying switch group 1 is output from the musical tone generation circuit 14 to the rhythm sound,
The bass sound is emitted from the rhythm sound / bass sound generation circuit 13.

On the other hand, during the performance in the automatic performance mode, when the second mode changeover switch 4 is turned on to switch to the breath performance mode, the emission of the chord being automatically played is stopped.

In the breath performance mode, the chord specified by the operation of the pitch specifying switch group 1 is emitted only when the breath operation is performed. The rhythm sound and the bass sound are emitted in accordance with the accompaniment pattern specified by operating the accompaniment pattern selection switch group 7, as in the automatic performance mode.

Therefore, in the breath performance mode, the rhythm sound and the bass sound are automatically played in accordance with the accompaniment pattern, and the chords are played in a pattern corresponding to the breath operation.

More specifically, when the automatic accompaniment mode is selected, the CPU 12 reads the status of the second mode changeover switch 4 and determines that the mode has been switched to the breath play mode. Outputs information and stops the emission of the chord currently being emitted. Then, the status of the pitch specifying switch group 1 is read out in the same manner as in the automatic performance mode, and if it is determined from the operation state of the pitch specifying switch group 1 that a chord is specified, the designated chord is designated. The pitch information of each constituent sound is created and output to the tone generation circuit 14. Also, the voltage detection circuit 10, A / D
Via the converter 11, the breath data sensed by the breath sensor 9 is read out, and when the value of the breath data is equal to or greater than a predetermined value, key ON information is output to the tone generation circuit 14.

Thus, the chord specified by the operation of the pitch specifying switch group 1 is emitted only when the breath operation is performed.

If the CPU 12 determines that the start / stop switch 5a is turned on in the same manner as in the automatic performance mode, the CPU 12 generates a rhythm sound / voice based on the accompaniment pattern specified by operating the accompaniment pattern selection switch group 7. The rhythm sound information and the bass sound information are output to the bass sound generation circuit 13. Therefore, the rhythm sound and
A rhythm sound and a bass sound are generated from the bass sound generation circuit 13.

The selection of the performance mode by operating the first mode changeover switch 3 and the second mode changeover switch 4 is performed by the CPU 12 executing the operation flowchart of FIG. 3 at predetermined time intervals by a timer interrupt (timer interruption). .

Although not shown, the CPU 12 has two flags, a normal flag and an auto flag. The CPU 12 automatically determines whether the mode is the normal mode or the automatic accompaniment mode according to the normal flag. Mode or breath performance mode.

When a timer interrupt occurs, the CPU 12 reads the status of the first mode changeover switch 3 and determines whether or not the first mode changeover switch 3 is on (ON) (SA1). Determine whether the normal flag is "0" (SA
2). If the normal flag is not "0", the normal flag is reset to "0" (SA3).

By the above operation, when the first mode changeover switch 3 is turned off (OFF), the normal mode (normal flag =
0) is selected.

On the other hand, if it is determined in SA1 that the first mode changeover switch 3 is on (SA1), it is determined whether or not the normal flag is "1" (SA4), and the normal flag must be "1". For example, the normal flag is set to "1" (SA5).

When the first mode changeover switch 3 is turned on by the above operation, the automatic accompaniment mode (normal flag = 1) is selected.

After setting the normal flag according to SA1 to SA5, the CPU 12 reads the status of the second mode changeover switch 4 and determines whether or not the second mode changeover switch 4 is on (SA6). If the mode changeover switch 4 of No. 2 is not turned on, it is determined whether or not the auto flag is "0" (SA7). If it is determined that the auto flag is "0", the auto flag is set to "1" (SA8).

When the second mode changeover switch 4 is turned off by the above operation, the automatic performance mode (auto flag = 1) is selected.

On the other hand, if it is determined in SA6 that the second mode changeover switch 4 is on, it is determined whether the auto flag is "1" (SA9). If it is determined that the auto flag is "1", the auto flag is reset to "0".

When the second mode changeover switch 4 is turned on by the above operation, the breath performance mode (autofract = 0) is selected.

The pitch designation (in the normal mode) or the chord designation (in the automatic accompaniment mode) performed when the pitch designation switch group 1 is operated is controlled by the CPU 12 by the timer interrupt (timer interruption) as shown in FIG. This is performed by executing a flowchart.

When a timer interrupt occurs, the CPU 12 first determines whether the normal flag is "1" (SB1). If the normal flag is "1", the CPU 12 reads the status of the pitch designation switch group 1 and turns on the switch which is turned on. , The root of the specified chord and the type of chord are obtained, and pitch information of each component of the specified chord is created from the information on the root of the chord and the type of chord (SB2). Then, the created root sound, third sound, fifth sound (or seventh sound)
Pitch information of the CPU 1 (not shown)
The data is stored in the CHORD0, CHORD1, and CHORD2 buffers contained in the buffer 2 and output to the tone generator 14.

By the above operation, in the automatic accompaniment mode, the pitch information of each component tone of the designated chord is created by designating the root of the desired chord and the type of the desired chord by operating the pitch designation switch group 1. The generated pitch information of each of the constituent tones is stored in buffers CHORD0, CHORD1, and CHORD2 and output to the tone generator 14.

On the other hand, if the normal flag is "0", that is, the normal mode in SB1, the status of the pitch designation switch group 1 is read, and the tone pitch of the musical tone designated by the combination of the ON switches is determined. Create pitch information and store it in the A register (not shown) (SB
Four). Then, the pitch information stored in the A register is stored in a buffer KDATA (not shown) and output to the tone generation circuit 14 (SB5).

When the pitch specifying switch group 1 is operated in the normal mode by the above operation, the pitch information of the musical tone specified by the operation of the pitch specifying switch group 1 is stored in the buffer KDATA and output to the musical tone generating circuit 14. .

In particular, although not shown in the flowchart, the CPU 12 sends the breath sensor 9 through the voltage detection circuit 10 and the A / D converter 11.
If the value of the breath data becomes larger than a predetermined value when the musical sound is not being emitted in the normal mode, the key ON information is output to the musical sound generation circuit 14. If the value of the breath data is greater than or equal to the predetermined value during the sound emission, the volume information corresponding to the value of the breath data is output to the tone generating circuit 14. further,
If the value of breath data becomes equal to or less than a predetermined value during tone emission, key OFF information is output to the tone generator 14.

Therefore, in the normal mode, if the operation of the pitch specifying switch group 1 and the breath operation are performed to specify a musical tone having a desired pitch, a desired musical tone is emitted at a desired volume.

Also, when the breath performance mode is selected in the automatic accompaniment mode, the output of the musical tone and the volume level of the musical tone are controlled in accordance with the breathing operation as in the normal mode. In the breath performance mode, the chord is designated by operating the pitch designation switch group 1 as described above, so that the chord is emitted.

Further, the automatic accompaniment performed by turning on the start / stop switch 5a of the accompaniment control switch group 5 is performed by the CPU 12 executing the operation flowchart of FIG. 5 by a timer interrupt (timer interrupt).

When a timer interrupt occurs, the CPU 12 reads the status of the start / stop switch 5a and determines whether the start / stop switch 5a is on (SC1). If it is determined that the start / stop switch 5a is off, then it is determined whether or not the start switch flag is "1" (SC2). If the start switch flag is "1", the start switch flag is reset. Reset to "0" (SC3).

Although the start switch flag is not particularly shown,
This flag is built in the CPU 12 and stores the latest operation state of the start / stop switch 5a.

When the start / stop switch 5a is turned off by the above operation, the start switch flag is reset to "0".

On the other hand, if it is determined in SC1 that the start / stop switch 5a is on, it is determined whether or not the start switch flag is "0" (SC4). If the start switch flag is "0", it is set to "1". Set (SC
Five). If the start switch flag has already been set to "1", the process returns to the original state without performing any processing.

When the start / stop switch 5a is turned on from off by the above operation, the start switch flag becomes "1".
Is set to

Subsequent to SC5, it is determined whether the start ON flag is set to "1" (SC6).

Although not shown, the start ON flag is a flag built in the CPU 12 for storing whether or not the automatic performance is currently being performed.

If the start ON flag is "0" in SC6, the start ON flag is set to "1" (SC
7) It is determined whether the normal flag is "1" (SC8).

If the normal flag is "1", that is, if the normal mode is currently selected, the status of the accompaniment pattern selection switch group 7 is read out, the specified accompaniment pattern is determined by operating the accompaniment pattern selection switch group 7, and the designation is performed. The stored accompaniment pattern is stored in the pattern storage device 6.
Read from Then, the rhythm sound information is output to the musical sound generation circuit 14 while setting the sound generation timing by the tempo clock applied from the automatic accompaniment control clock generation circuit 8 in accordance with the rhythm pattern specified by the read accompaniment pattern (SC9).

By the above operation, when the start / stop switch 5a is turned on when the automatic accompaniment is not performed in the normal mode, the rhythm sound is emitted in the accompaniment pattern designated by operating the accompaniment pattern switch group 7 (auto rhythm).

Therefore, in the normal mode, a normal performance can be performed in accordance with automatic accompaniment (auto rhythm) based on a preset rhythm sound.

On the other hand, in SC8, the normal flag is “1”, that is,
If it is determined that the automatic accompaniment mode is currently selected, it is next determined whether or not the auto flag is "1" (SC10). If the auto flag is "1", the rhythm sound information corresponding to the rhythm pattern of the accompaniment pattern designated by operating the accompaniment pattern selection switch group 7 is generated in the same manner as in SC9. Output to the circuit 13. If a chord is designated by operating the pitch designation switch group 1 when the rhythm sound is produced, the base note information equal to the root of the chord is output to the rhythm / base tone generation circuit 13. Further, according to SB3 in the flowchart of FIG. 4, the pitch information of each component sound of the designated chord is output to the tone generation circuit 14, and the tone generation circuit generates a chord (SC11).

With the above operation, when a desired accompaniment pattern is designated by operating the accompaniment pattern selection switch group 7 in the automatic performance mode of the automatic accompaniment mode, the rhythm sound of the designated accompaniment pattern is automatically emitted (auto rhythm). .
When a desired chord is designated by operating the pitch designation switch group 1, when the operation is performed at the time of generating the auto rhythm, a bass tone equal to the designated chord and the root of the chord are automatically emitted. (Auto code and auto base).

On the other hand, if the auto flag is "0" in SC10, that is, if the breath play mode is currently selected, the status of the accompaniment pattern selection switch group 7 is read out in the same manner as in SC11, and the operation of the accompaniment pattern selection switch group 7 is performed. A rhythm pattern designated by the specified accompaniment pattern is generated from the rhythm sound / bass sound generation circuit 13 (SC1
2). When a chord is designated by operating the pitch designation switch group 1, pitch information of a bass tone equal to the root of the chord is output to the rhythm / bass tone generation circuit 13 by SB3 in FIG. Therefore, the rhythm sound / bass sound generation circuit
13 generates a rhythm sound and a bass sound simultaneously (SC1
2).

By the above operation, in the breath performance mode of the automatic accompaniment mode, when the accompaniment pattern is designated by operating the accompaniment pattern selection switch group 7, the rhythm pattern specified by the designated accompaniment pattern is automatically played (auto rhythm). . When a chord is designated by the pitch designation switch group 1, a bass tone equal to the root of the chord is automatically played in accordance with the rhythm pattern of the accompaniment pattern (auto bass). When the chord is designated by operating the pitch designation switch group 1 in the breath performance mode, the pitch information of each constituent tone of the chord is transmitted to the tone generation circuit 14 by SB3 in the flowchart of FIG. Is output. In the breath play mode, the CPU 12 controls the voltage detection circuit 10 and A
The breath data detected by the breath sensor 9 is read out via the / D converter 11, and when the value of the breath data exceeds a predetermined value, the key ON information is output to the tone generation circuit 14.
Therefore, in the breath performance mode, the chord designated by the pitch designation switch group 1 is emitted only when the breath operation is performed.

If it is determined in SC6 that the start ON flag is "1", the start ON flag is reset to "0" (SC13), and if a rhythm sound is being generated, the rhythm / base sound generation circuit 13 is developed. Stop information is output, and if a chord is being generated by the tone generation circuit 14, the key is turned off to the tone generation circuit 14.
Output the information (SC14).

By the above operation, if the start / stop switch 5a is turned on during the automatic performance of the auto rhythm, the auto bass or the auto chord, the automatic performance is stopped.

[Effect of the invention]

According to the present invention, a mode switching means is provided in an electronic wind instrument, and a chord performance in automatic accompaniment (harmonic background performance) is performed by operating the mode switching means.
Can be selected in accordance with a preset accompaniment pattern or in a manual performance of the player by a breath operation, so that only by operating the mode switching means, the player can improvise automatic accompaniment. This makes it possible to perform the automatic accompaniment with various changes.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of one embodiment, FIGS. 2 (a) to 2 (d) are external views of one embodiment, and FIG. 3 is a first mode switch and a second mode switch operated. Flow chart of the CPU when the pitch designation switch group is operated, and FIG. 5 is a flow chart of the CPU when the start / stop switch is operated.
4 is an operation flowchart of a CPU. DESCRIPTION OF SYMBOLS 1 ... Pitch designation switch group, 2 ... Tone / effect switch group, 3 ... First mode switching switch, 4 ... Second mode switching switch, 5 ... Accompaniment control switch group, 6 ... Pattern storage device, 7 ... Accompaniment pattern selection switch group, 9: breath sensor, 10: voltage detection circuit, 11: A / D converter, 12: C
PU, 13: Rhythm / bass sound generation circuit, 14: Tone generation circuit, 15: Music output section.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G10H 1/00 G10H 1/38

Claims (1)

(57) [Scope of request for utility model registration] 1. A chord designating means for designating a chord by a chord designating operation, a sensor means for detecting a breathing operation on a blower portion, an accompaniment pattern storage means for storing an accompaniment pattern, and stored in the accompaniment pattern storage means. An accompaniment pattern reading means for reading an accompaniment pattern, a mode switching means for selectively switching between an automatic performance mode and a breath performance mode, and, when the automatic performance mode is selected by the mode switching means, designation by the chord designation means. The chord designated by the chord designating means is detected by the sensor when the breath performance mode is selected by the mode switching means. Control to generate sequentially according to the breath operation detected by the means Electronic wind instrument, characterized in that it comprises a that control means.