JPH0411880B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an automatic accompaniment device for an electronic musical instrument, and more particularly to a device that uses a pedal keyboard to control the production of automatic accompaniment tones.

[Conventional technology]

Generally, automatic accompaniment devices for electronic musical instruments include those that play automatic chord tones, automatic bass tones, automatic arpeggio tones, and automatic rhythm tones. There are two ways to play automatic chord sounds and automatic bass sounds: single finger performance mode (hereinafter referred to as SF mode) and finger chord performance mode (hereinafter referred to as FC mode).
There is. In SF mode, one key on the lower keyboard is pressed as the root note, and an automatic chord tone and automatic bass tone are formed based on the specified chord type and rhythm type using this root note and other appropriate means. In FC mode, multiple keys are pressed on the lower keyboard, the root note and chord type are detected based on the multiple keys, and the rhythm type specified by the root note, chord type, and other appropriate means is detected. An automatic bass tone is formed, and the tones of a plurality of keys pressed on the lower keyboard are opened and closed in accordance with the above rhythm to produce automatic chord tones. In addition, automatic arpeggio performance involves pressing down a single or multiple keys on the lower keyboard and sequentially selecting notes formed based on the above single note or notes of multiple keys based on the arpeggio pattern specified by other appropriate means. to control pronunciation. Further, automatic rhythm performance is to generate various rhythm instrument sounds according to a specified rhythm by an appropriate means, and is started by pressing a start switch.

[Problem that the invention seeks to solve]

However, once the automatic accompaniment performance is started, it is difficult to interrupt the musical instrument performance. In other words, when playing a musical instrument, the right hand is used to play melody tones, and the left hand is used to play automatic chord tones, automatic bass tones, automatic arpeggio tones, etc., so operations for controlling the production of automatic accompaniment tones are necessary. This is because children cannot be manipulated.

This invention was made in view of the above points,
It is an object of the present invention to provide an automatic accompaniment device for an electronic musical instrument that enables the automatic accompaniment device to arbitrarily control the sound production during a performance and improves playability.

[Means for solving problems]

According to this invention, a first keyboard is used to play chord sounds, a second keyboard is used to play bass sounds, and automatic accompaniment sounds are generated based on the keys pressed on the first keyboard. automatic accompaniment sound generation means for generating a key press; a first storage means for temporarily storing a key press detection output when a key is pressed on the second keyboard; a second storage means for storing a signal at the beginning of a measure; and a sound generation control means for stopping the automatic accompaniment sound generated from the automatic accompaniment sound generation means in accordance with the storage output of the second storage means. It is composed of:

Further, according to the present invention, there is provided a first keyboard for playing chord tones, a second keyboard for playing bass tones, and automatic accompaniment sounds based on the keys pressed on the first keyboard. automatic accompaniment sound generation means for generating a sound; a first storage means for temporarily storing a key press detection output when a key is pressed on the second keyboard;
a second memory means for storing the signal at the beginning of a measure and clearing this memory at the end of the measure when the memory means stores the key press detection output; and a sound generation control means for controlling the stop and start of the automatic accompaniment sound generated by the automatic accompaniment sound generation means.

[Effect]

When a key is pressed on the second keyboard, this key press detection output is stored in the first storage means, and when the key press detection output is stored in the first storage means, a signal is sent to the second keyboard at the beginning of a measure. is stored in the storage means of. The production of automatic accompaniment sounds is controlled in accordance with the contents stored in the second storage means. The memory of this second storage means is cleared, for example, at the end of a measure.

〔Example〕

The present invention will be described in detail below based on embodiments shown in the accompanying drawings.

FIG. 1 shows an embodiment of an electronic musical instrument to which the present invention is applied, which includes an upper keyboard 1, a lower keyboard 2, and a pedal keyboard 3.

The upper keyboard 1 is used for playing melody, and generates key information indicating the pressed key in response to a key pressed on the upper keyboard 1, and adds this key information to a melody sound forming circuit 4. The melody sound forming circuit 4 forms a musical sound signal corresponding to the key being depressed on the upper keyboard 1 based on the added key information, and applies this to the speaker 6 via the amplifier 5. Therefore, speaker 6
From then on, the musical tones of the keys pressed on the upper keyboard 1 are directly produced as melody tones.

The lower keyboard 2 is used for playing normal chords, and also plays automatic chords, automatic bass, and automatic arpeggio depending on the operating status of arpeggio mode selection switch 7, SF mode selection switch 8, and FC mode selection switch 9. Used for performance.

First, a case where switches 7, 8, and 9 are all off will be described. In this case, switch 7,
The arpeggio mode signal ARP, single finger mode signal SF, and finger chord mode signal FC output from 8 and 9 are all "0",
The automatic base code signal ABC output from the OR circuit 10 that ORs the signals SF and FC is also "0".

As a result, the signal SF (“0”) is transferred to the inverter 11.
The selector 12 which is inverted by the inverter 13 and applied to the A input select terminal SA selects the signal to be applied to the A input, and the selector 14, in which the signal ABC (“0”) is inverted by the inverter 13 and applied to the B input select terminal SB, selects the B input. do. Further, the AND circuit 15 to which the signal ARP (“0”) is applied becomes inactive, the arpeggio sound forming circuit 16 to which the output of this AND circuit 15 is applied to the arpeggio sound control terminal AA becomes inactive, and the signal ABC (“ The chord tone forming circuit 19 and the bass tone forming circuit 20 are in a normal operating state, in which a signal (0'') is applied to the normal selection terminal NM via the inverters 17 and 18, respectively. Here, the normal operating state refers to a state in which a musical tone signal is formed only based on key information generated from the lower keyboard 2 or the pedal keyboard 3, and the melody sound forming circuit 4
Refers to the same operating state as .

Therefore, the lower keyboard 2 generated from the lower keyboard 2
The key information indicating the key being pressed is the selector 12.
The chord tone forming circuit 19 forms a musical tone signal corresponding to the key pressed on the lower keyboard 2 based on the added key information, and sends this to the amplifier. 5 and is added to the speaker 6 to generate a chord sound.

Also, one key information is selected by the single note selection circuit 21 from among the key information generated from the pedal keyboard 3 and indicating the key being pressed on the pedal keyboard 3, and the bass note is selected via the B input of the selector 14. Formation circuit 2
0, and the base tone forming circuit 20 forms a musical tone signal corresponding to a single key pressed on the pedal keyboard 3 based on the added key information, and sends this to the speaker 6 via the amplifier 5. Pronounce it as an additional bass sound.

That is, in this case, the musical tones of the keys pressed on the lower keyboard 2 and the musical tones of the keys pressed on the pedal keyboard 3 are directly sounded from the speaker 6 as chord tones and bass tones.

In addition, the tempo oscillator 22 controls the tempo of automatic accompaniment performances such as automatic bass chord performance, automatic arpeggio performance, and automatic rhythm performance, and uses tempo pulses of a frequency corresponding to a set tempo.
Generates TP. This tempo pulse TP is counted by the tempo counter 23 and output as an address signal for the pattern memory 24.

The pattern memory 24 corresponds to various rhythms,
Each rhythm is composed of a bass pattern, arpeggio pattern, chord pattern, rhythm pattern, and read-only memory. This memory 24 specifies the pattern to be read out corresponding to the rhythm selected by a rhythm selection switch (not shown), and the tempo counter 2
According to the address signal output from 3, the bass pattern signal BP and bass sound generation timing signal BT corresponding to the bass pattern, the arpeggio pattern signal AP and arpeggio sound generation timing signal AT corresponding to the arpeggio pattern, and the chord pattern correspond to the arpeggio pattern signal AP and arpeggio sound generation timing signal AT. Chord sound pronunciation timing
CT, reads out the rhythm pattern signal RP corresponding to the rhythm pattern. Here, the bass pattern signal BP is information indicating the pitch relationship to the root note of the automatic bass note to be generated, the bass sound generation timing signal BT is a signal indicating the generation timing of the automatic bass note to be generated, and the arpeggio pattern signal AP is Information that specifies the order of automatic arpeggio notes to be generated, arpeggio sound generation timing signal AT is a signal that indicates the generation timing of automatic arpeggio notes that should be generated, and chord sound generation timing signal CT is a signal that indicates the generation timing of automatic chord notes that should be generated. signal indicating,
The rhythm pattern signal RP is information indicating the type of rhythm sound to be generated and the timing of its generation. Among the signals read out from the pattern memory 24, the base pattern signal BP, the bass sound generation timing signal BT, and the chord sound generation timing signal CT
is used for the automatic bass chord performance described later, and the arpeggio pattern signal AP and the arpeggio sound generation timing signal AT are used for the automatic arpeggio performance described later. Further, the rhythm pattern signal RP is used for automatic rhythm performance, and this signal RP is applied to the rhythm sound source circuit 25. The rhythm sound source circuit 25 generates a rhythm pattern signal.
A rhythm sound signal indicating various rhythm instrument sounds is generated according to the RP, and this signal is sent to the speaker 6 via the amplifier 5.
In addition to this, it is also produced as an automatic rhythm sound. In addition,
The pattern memory 24 generates a bar pulse mp for each bar.
is output, and the tempo display 26 is decremented.

Next, the case where only the arpeggio mode selection switch 7 is turned on will be explained. When the arpeggio mode selection switch 7 is turned on, the arpeggio mode signal ARP becomes "1". On the other hand, since the automatic bass chord signal ABC is "0", the AND circuit 28 of the sound generation control circuit 27 (a detailed configuration example of which is shown in FIG. 2) according to the present invention is inoperative, and the bass tone control signal BS and arpeggio The sound control signal AS, the chord sound control signal CS, and the rhythm sound control signal RS are not generated (they are "0"). Therefore, the signal AS
The AND circuit 15 to which the signal ARP (“0”) inverted by the inverter 29 and the signal ARP (“1”) is added is operable.

Key information generated from the lower keyboard 2 and indicating the key being pressed on the lower keyboard 2 is applied to the arpeggio tone selection circuit 30 via the A input of the selector 12. The arpeggio sound selection circuit 30 has an arpeggio pattern signal AP read out from the pattern memory 24 added thereto, and according to the designation of this arpeggio pattern signal AP, it selects key information indicating the key being pressed on the lower keyboard 2. They are selected one by one and added to the arpeggio sound forming circuit 16. The arpeggio sound forming circuit 16 has an automatic arpeggio sound control terminal.
The arpeggio sound generation timing signal AT generated from the pattern memory 24 in AA is applied to the AND circuit 15.
A musical tone signal corresponding to this automatic arpeggio tone is formed based on the key information indicating the added automatic arpeggio tone, and this musical tone signal is used as the above-mentioned arpeggio tone generation timing signal.
Open/close envelope control is performed according to AT and output. The output of the arpeggio sound forming circuit 16 is sent to the amplifier 5.
is added to the speaker 6 via the , and is produced as an automatic arpeggio sound. Note that even when the selector 12 selects the B input by the single finger mode signal FC (“1”), the arpeggio tone selection circuit 30 performs the above operation based on the key information formed by the subordinate tone forming circuit 37, which will be described later. works similarly.

Next, the case where only the SF mode selection switch 8 is turned on will be explained. When the SF mode selection switch 8 is turned on, the single finger mode signal SF becomes "1" and the automatic base code signal ABC becomes "1", thereby entering the SF mode.

As a result, the selector 12 selects the signal applied to the B input, and the selector 14 selects the signal applied to the A input. In addition, the selector 31 to which the signal SF ("1") is applied to the A input select terminal SA selects the signal to be applied to the A input, and the chord tone forming circuit 19 and the bass tone forming circuit 20 are connected to the AND circuits 33 and 35 to select the signal ABC. (“1”) and chord tone control signal CS
(“0”) is inverted by the inverter 32, or signal ABC (“1”) and base sound control signal BC
(“0”) is enabled by the signal inverted by the inverter 34, so the automatic base code is in an operating state. Here, the automatic bass chord operating state is a musical tone signal of an automatic chord tone or an automatic bass tone based on the chord tone generation timing signal CT or bass tone generation timing signal BT generated from the pattern memory 24 described above together with the added key information. Refers to the operating state in which musical tone signals are formed. At this time, the AND circuit 28 (FIG. 2) of the sound generation control circuit 27 to which the signal ABC ("1") is applied becomes operational.

In the SF mode, automatic chord tones and automatic bass tones are formed based on a single key pressed on the lower keyboard 2.

Key information generated from the lower keyboard 2 and indicating the keys being depressed on the lower keyboard 2 is added to the root note detection circuit 36. When the signal SF is "1" (in SF mode), the root note detection circuit 36 detects the lowest note of the keys pressed on the lower keyboard 2 and detects the note indicating the note name of this key. predetermined octave information is added to the name information and output as root note information RD indicating the root note.On the other hand, when the signal FC is "1" (in FC mode), the key being pressed on the lower keyboard 2 detects the root note and chord type of the chord composed of (Mejiya (M), Maina (m),
Outputs information m (FC) and 7 (FC) indicating the seventh (7)).

Root note information RD output from the root note detection circuit 36
is added to the follower tone forming circuit 37. The follower tone forming circuit 37 uses this root note information RD and the touch bar 38,
Based on the chord type specified by 39, key information indicating the chord constituent tones is formed. Here, the chord type specified by touch bars 38 and 39 is major (M) when both touch bars 38 and 39 are off, minor (m) when only touch bar 38 is on, and seventh when only touch bar 39 is on. (7) is specified. An example of information formation in the subordinate tone forming circuit 37 is that when the chord type designation is major (M), perfect 1st, major 3rd, and
Forms key information indicating notes that are in the interval relationship of a perfect fifth, and in the case of minor (m), it is a perfect fifth with respect to the root note.
Forms key information that indicates notes that have an interval relationship of a degree, a minor third, and a perfect fifth, and in the case of a seventh (7), it has an interval relationship of a perfect 1st, a major third, and a minor seventh to the root note. Form key information indicating a certain sound.

Key information indicating the chord constituent tones formed by the follower tone forming circuit 37 is applied to the chord tone forming circuit 19 via the B input of the selector 12. The chord tone forming circuit 19 has a chord tone generation timing signal CT generated from the pattern memory 24 applied to its automatic chord tone control terminal AC via an AND circuit 33, and key information indicating the added chord constituent tone. Based on this, a musical tone signal corresponding to the chord constituent tones is formed, and this musical tone signal is subjected to open/close envelope control according to the chord tone generation timing signal CT and output. A musical tone signal indicating this automatic chord tone is applied to a speaker 6 via an amplifier 5, and is produced as an automatic chord tone.

On the other hand, the root note information RD output from the root note detection circuit 36 is added to the adder 40. In addition, information m (SF) and 7 (SF) indicating the code type specified by the touch bars 38 and 39 are A of the selector 31.
It is applied to the subtone addition data generation circuit 41 via an input.

The follower addition data generation circuit 41 generates a base pattern signal BP read out from the pattern memory 24.
is added, and this base pattern signal BP
According to the information (m) and (7) indicating the chord type added from the selector 31, addition data SD for forming a subordinate tone is outputted and added to the adder 40.

The adder 40 adds the above addition data SD to the root note information RD added from the root note detection circuit 36, thereby forming key information indicating a subordinate note having a predetermined pitch relationship with respect to the root note. It should be noted that since the configurations of the subtone addition data generation circuit 41 and the adder 40 are well known, a detailed description thereof will be omitted in this specification.

The key information indicating the automatic bass tone formed by the adder 40 is applied to the bass tone forming circuit 20 via the A input of the selector 14. The bass sound forming circuit 20 has the bass sound generation timing BT generated from the pattern memory 24 applied to its automatic bass sound control terminal AB via the AND circuit 35, and based on the key information indicating the added automatic bass sound. A musical tone signal corresponding to this automatic bass tone is formed, and this musical tone signal is controlled in an open/close envelope according to the bass tone generation timing signal BT and output. A musical tone signal indicating this automatic bass tone is applied to a speaker 6 via an amplifier 5, and is produced as an automatic bass tone.

Here, when a key is pressed on the pedal keyboard 3, a signal PKO indicating key information is generated from the pedal keyboard 3 (this signal is a binary signal consisting of multiple bits).
is applied to the OR circuit 42 (FIG. 2) of the sound generation control circuit 27, and the OR circuit 42 applies a signal "1" to the AND circuit 28. On the other hand, the AND circuit 28
Since it is enabled to operate by ABC (“1”), the AND circuit 28 outputs a signal “1”. The output signal of the AND circuit 28 is applied to the set terminal S of the flip-flop 47, the flip-flop 47 is set, and the signal "1" is output from the output terminal Q.
Output. As a result, the bass sound select switch 43, the arpeggio sound select switch 44,
When either the chord tone select switch 45 or the rhythm tone select switch 46 is on, the bass tone control signal BS, arpeggio tone control signal AS, chord tone control signal CS, and rhythm tone control signal RS are correspondingly turned on. Either one becomes "1".

Now, assuming that only the bass tone select switch 43 is turned on, only the bass tone control signal BS among the outputs of the sound generation control circuit 27 becomes "1".
This signal BS is applied to an AND circuit 35 via an inverter 34. As a result, the AND circuit 35
becomes inoperative, and the signal applied to the automatic bass sound control terminal AB of the bass sound forming circuit 20 becomes "0". Therefore, the bass sound forming circuit 20 stops generating the musical sound signal indicating the bass sound, and the automatic bass sound emitted from the speaker 6 is stopped.

When the bar pulse mp output from the pattern memory 24 (FIG. 1) is applied to the reset terminal R of the flip-flop 47 after the pedal keyboard 3 is released, the flip-flop 47 is reset and the signal is output.
BS becomes "0". Therefore, AND circuit 35
becomes operable and the bass sound generation timing signal BT is applied to the automatic bass sound control terminal AB. As a result, the bass sound forming circuit 20 generates a musical sound signal representing the bass sound, which is applied to the speaker 6 via the amplifier 5 to generate an automatic bass sound.
In other words, the automatic bass performance returns again.

Furthermore, when the chord tone select switch 45 and rhythm tone select switch 46 are on, the generation and non-generation of the automatic chord tone and automatic rhythm tone are respectively controlled in response to key presses on the pedal keyboard 3 and bar pulse MP. . That is, when the chord tone select switch 45 is on, the signal CS generated from the sound generation control circuit 27 in response to a key press on the pedal keyboard 3 becomes "1", and the AND circuit 33 becomes inactive and the chord tone is output. The signal applied to the automatic chord tone control terminal AC of the forming circuit 19 becomes "0", and the generation of the chord tone is stopped. After that, when the pressed key on the pedal keyboard 3 is released and a bar pulse mp is generated, the flip-flop 47 is reset by this bar pulse mp, and the signal CS becomes "0".
As a result, the AND circuit 33 becomes operational, and the chord sound generation timing signal CT is applied to the automatic chord sound control terminal AC, returning to automatic chord performance again. Also, when the rhythm sound select switch 46 is on, the pedal keyboard When the key is pressed, the signal RS generated from the sound generation control circuit 27 becomes "1", and this signal RS is applied to the disable enable terminal DIS of the rhythm sound source circuit 25. Therefore, the rhythm sound source circuit 25 stops generating the rhythm sound signal indicating the rhythm sound, and thereby the automatic rhythm sound generation from the speaker 6 is stopped. When a bar pulse mp occurs after the key that was pressed on pedal keyboard 3 is released,
The signal RS becomes "0" and the automatic rhythm performance returns again.

In the above case, switch 7 is off and automatic arpeggio performance is not being performed. However, if switch 7 is turned on and automatic arpeggio performance is to be performed, the automatic arpeggio sound can be produced by turning on the arpeggio sound select switch 44. It can also be controlled. That is, when the switch 44 is on, the signal AS generated from the sound generation control circuit 27 in response to a key press on the pedal keyboard 3 becomes "1", and this signal AS disables the AND circuit 15 and performs automatic arpeggio sound control. The signal applied to terminal AA becomes "0" and the automatic arpeggio sound is stopped, and when a bar pulse mp occurs after the key that was pressed on pedal keyboard 3 is released, the signal AS becomes "0" and the AND circuit 15 becomes operable and returns to automatic arpeggio performance.

Although the above explanation is based on the case where any one of the switches 43 to 46 is on, if more than one of the switches 43 to 46 is on at the same time, multiple automatic accompaniment sounds will be produced accordingly. Control takes place. For example, switch 43,4
5 is on, the generation control of both the automatic bass tone and the automatic chord tone is performed in response to key presses on the pedal keyboard 3 and bar pulses mp.

Next, a case where only the FC mode selection switch 9 is turned on will be explained. When CF mode selection switch 9 is turned on, the finger code mode signal
FC is “1”, automatic base code signal ABC is “1”
Therefore, it becomes FC mode.

As a result, the selectors 12 and 14 select the signal applied to the A input, and the selector 31, whose signal FC ("1") is applied to the B input select terminal SB, selects the signal applied to the B input. In addition, the chord tone forming circuit 19 and the bass tone forming circuit 20 are configured so that the AND circuits 33 and 35 generate a signal obtained by inverting the signal ABC (“1”) and the chord tone control signal CS (“0”) by the inverter 32, and the signal ABC ( “1”) and bass sound control signal
Since BS (“0”) is enabled to operate by the signal inverted by the inverter 34, the automatic base code is in an operating state.

In the FC mode, automatic chord tones and automatic bass tones are produced based on the plurality of keys pressed on the lower keyboard 2.

The key information that is generated from the lower keyboard 2 and indicates the key being pressed in chord form on the lower keyboard 2 is sent to the selector 1.
The signal is applied to the chord tone forming circuit 19 via the A input of No. 2, where it is converted into a musical tone signal indicating an automatic chord tone. This musical tone signal is applied to a speaker 6 via an amplifier 5, and is produced as an automatic chord tone.

Further, key information indicating the key being pressed in the form of a chord on the lower keyboard 2 is added to the root note detection circuit 36. The root note detection circuit 36 detects the root note and chord type of the chord formed by the note indicated by the key information added in this FC mode, and uses the information indicating the root note as the root note information RD to the adder 40. In addition to the information m (FC) indicating the code type, 7
(FC) is applied to the follower addition data generation circuit 41 via the B input of the selector 31. The secondary tone addition data generation circuit 41 generates addition data SD for forming a secondary tone in accordance with the base pattern signal BP and the information (m) and (7) indicating the chord type.

The adder 40 adds the above-mentioned addition data SD to the root note information RD added from the root note detection circuit 36, thereby forming key information indicating a subordinate note having a predetermined pitch relationship with respect to the root note. Information selector 14
It is applied to the bass sound forming circuit 20 via the A input of. The bass tone forming circuit 20 converts the added key information into a musical tone signal indicating an automatic bass tone, and the amplifier 5
It is added to the speaker 6 via the speaker 6, and is generated as an automatic bass sound.

Here, when a key is pressed on the pedal keyboard 3 in the FC mode, a signal PKO indicating key information generated from the pedal keyboard 3 is applied to the OR circuit 42 (FIG. 2) of the sound generation control circuit 27. applies a signal “1” to the AND circuit 28. On the other hand, since the AND circuit 28 is enabled to operate by the signal ABC ("1"), the AND circuit 28 outputs the signal "1". As a result, the flip-flop 47 is set, and the bass sound control signal BS and the arpeggio sound control signal are output according to the states of the switches 43 to 46.
AS, chord sound control signal CS, rhythm sound control signal
RS becomes "1".

Therefore, similarly to when the SF mode is selected, the generation of automatic chord tones, automatic bass tones, and automatic rhythm tones is stopped. Further, when the arpeggio mode selection switch 7 is turned on and automatic arpeggio performance is being performed, the generation of the automatic arpeggio sound is also stopped by the arpeggio sound control signal AS.

Furthermore, when the key pressed on the pedal keyboard 3 is released, the flip-flop 47 is activated by the bar pulse MP.
When is reset, the instrument returns to automatic bass chord playing in FC mode, similar to when SF mode is selected.

FIG. 3 shows another embodiment according to the present invention. In the embodiments in FIGS. 1 and 2, the automatic accompaniment tone is stopped until the end of the bar, but in the embodiment in FIG. In this example, the automatic accompaniment sound is stopped in synchronization with the beginning of a measure, and is started again in synchronization with the end of the measure.

When a key is pressed on the pedal keyboard 3 when the signal ABC is "1", the OR circuit 42 outputs a signal "1",
AND circuit 28 applies a signal "1" to set terminal S of flip-flop 48. As a result, the flip-flop 48 is set, and signals "1" and "0" are output from the output terminals Q and Q to the AND circuit 48, respectively.
9 and 50. Therefore, the AND circuit 49 becomes operable and the AND circuit 50 becomes inoperable. Here, when the bar pulse mp is added from the pattern memory 24, the AND circuit 49 outputs a signal "1" and sets the flip-flop 47.

Also, the bar pulse mp is the D flip-flop 5
1 to the reset terminal R of flip-flop 48 with a slight delay. As a result, the flip-flop 48 is reset on the condition that the pedal keyboard 3 is released, and signals "0" and "1" are sent from the output terminals Q and Q to the AND circuit 4, respectively.
9 and 50. Therefore, the AND circuit 49 becomes inoperative and the AND circuit 50 becomes operable. Here, when the next bar pulse mp is added, the AND circuit 50 outputs a signal "1" and resets the flip-flop 47.

When a key is pressed on the pedal keyboard 3 in this way,
In synchronization with the start of the next bar after the key is pressed, the output of the flip-flop 47 is set to "1" to stop the automatic accompaniment sound.

Note that in the embodiments shown in FIGS. 1, 2, and 3, the bar pulse mp is configured to be output every bar, but it is not limited to this, and may be configured to be output every 2 bars or a predetermined plurality of bars. You may.

FIG. 4 shows another embodiment according to the present invention, in which an automatic accompaniment tone to be controlled for production is selected depending on whether the key pressed on the pedal keyboard 3 is a black key or a white key, and its production is stopped. are doing.

In this embodiment, an OR circuit 52 outputs a signal "1" when the key pressed on the pedal keyboard 3 is a white key.
and an OR circuit 53 that outputs a signal "1" when the pressed key is a black key. A signal PKO of key information indicating the pressed key outputted from the pedal keyboard 3 is inputted to the decoder 54. The decoder 54 is a signal
The PKO is decoded and a signal "1" is output to the output line corresponding to the pressed key among the output lines corresponding to each key of the pedal keyboard 3. Among the output lines of the decoder 54, the signal on the output line corresponding to the white key is input to the OR circuit 52, and the signal on the output line corresponding to the black key is input to the OR circuit 53. Therefore, when a white key is pressed on the pedal keyboard 3 when the signal ABC is "1", the OR circuit 52 outputs a signal "1", and the AND circuit 55 outputs a signal "1". As a result, the signal CS or (and) the signal RS becomes "1", and the automatic chord performance and automatic rhythm performance are stopped. Also,
When a black key is pressed on pedal keyboard 3, OR circuit 5
3 outputs a signal “1”, the AND circuit 56 outputs a signal “1”. This will cause the signal BS
Or (and) the signal AS becomes "1" and the automatic bass performance and automatic arpeggio performance are stopped.

In this manner, by selecting the key to be pressed on the pedal keyboard 3 (black key or white key), it is possible to select an automatic accompaniment tone whose generation should be controlled and to stop its generation.

Of course, all automatic accompaniment sounds can be stopped by pressing the black and white keys on the pedal keyboard 3 at the same time. Furthermore, the combination of automatic accompaniment sounds to be controlled in sound production is not limited to the above embodiments, and various combinations are possible. Furthermore, this embodiment can also be used in combination with the embodiments of FIG. 1, FIG. 2, or FIG. 3.

For example, a circuit consisting of a flip-flop 47 surrounded by a dotted line in FIG. 2 may be inserted on the output side of the AND circuit 55 and AND circuit 56 in FIG.
7, 48, 51 and AND circuits 49, 50 may be inserted.

FIG. 5 shows another embodiment in which the present invention is applied to an electronic musical instrument having a memory circuit 57 that stores key information of keys pressed on the lower keyboard 2 when the SF mode or FC mode is selected. It is.

First, set the mode switch 58 to SF mode and
If none of the FC modes is selected, the signal
ABC (“0”) is applied to the A input select terminal SA via the inverter 59. The selector 60 selects the signal to be applied to the A input, and the sound generation control circuit 61 receives the “0” signal ABC at its enable terminal EN. It becomes inoperable because it is added to it.

The upper keyboard 1 applies key information corresponding to the keys on the upper keyboard 1 to the tone forming circuit 62 regardless of whether the mode switch 58 is on or off. The musical tone forming circuit 62 forms a musical tone signal of a melody tone corresponding to the key information, and sends this to the speaker 6 via the amplifier 5.
Add to. Key information corresponding to the keys pressed on the lower keyboard 2 is sent to the tone forming circuit 62 via the A input of the selector 60.
Here, a musical tone signal of a chord tone corresponding to the key information is formed, and this signal is applied to a speaker 6 via an amplifier 5. Similarly, key information corresponding to a key pressed on the pedal keyboard 3 is applied to a musical tone forming circuit 62, which forms a musical tone signal of a bass tone corresponding to the key information, and this is transmitted via an amplifier 5 to a speaker 6.
Add to. Note that the rhythm circuit 63 sends a rhythm pattern signal corresponding to a rhythm selected by a rhythm selection switch (not shown) to the musical tone forming circuit 62.
Add to. The musical sound forming circuit 62 generates rhythm sound signals representing various rhythm instrument sounds in accordance with the rhythm pattern signal, and applies the signals to the speaker 6 via the amplifier 5 to generate automatic rhythm sounds.

Next, turn the mode switch 58 to SF mode and
When one of the FC modes is selected, the signal ABC (“1”) is applied to the B input select terminal SB of the selector 60, so the selector 60 selects the signal applied to the B input, and the sound generation control circuit 61 is activated. It becomes possible.

Key information corresponding to the key pressed on the lower keyboard 2 is added to the memory circuit 57, and is stored in the memory circuit 57 in response to an any key-on signal AKON indicating that a key is pressed on the lower keyboard 2. This key information is applied to the musical tone forming circuit 62 via the B input of the selector 60, and there, depending on the mode of the mode switch 58, automatic chord tone, automatic bass tone, automatic arpeggio tone (the arpeggio tone is set to the arpeggio mode by the mode switch 58). is selected)) are generated. These musical tone signals are applied to a speaker 6 via an amplifier 5, and are produced as automatic chord tones, automatic bass tones, and automatic arpeggio tones. The memory circuit 57 retains the key information corresponding to the pressed key even after the key pressed on the lower keyboard 2 is released, and when a new key is pressed on the lower keyboard 2, the memory circuit 57 retains the key information corresponding to the pressed key. The stored contents are changed to the key information of the new key.

Here, when a key is pressed on the pedal keyboard 3, the sound generation control circuit 61 applies a sound generation control signal to the clear terminal C of the memory circuit 57 to clear the key information stored in the memory circuit 57. Therefore selector 6
From 0, no key information is output, and automatic chord tones, automatic bass tones, and automatic arpeggio tones are not produced.

By pressing keys on the pedal keyboard 3 in this manner, automatic accompaniment sounds such as automatic chord tones, automatic bass tones, and automatic arpeggio tones can be stopped.
At this time, the key information corresponding to the key pressed on the pedal keyboard 3 is added to the musical tone forming circuit 62, but here the musical tone signal corresponding to the key information is not formed due to the signal applied from the mode switch 58. It's summery.

The automatic accompaniment performance stopped as described above is
Memory circuit 5 is activated by pressing a key on lower keyboard 2.
Since key information indicating this key is newly stored in 7, the process starts again.

〔Effect of the invention〕

As explained above, according to the present invention, it is extremely easy to temporarily interrupt any automatic accompaniment performance among automatic chord performance, automatic bass performance, automatic arpeggio performance, and automatic rhythm performance even during performance. , it is possible to add variety to an automatic accompaniment performance that tends to be monotonous, and it is possible to improve the performance effect. Furthermore, according to the present invention, the automatic accompaniment sound generation control is automatically started and stopped in synchronization with the measures, so there is no need to perform key operations on the second keyboard in synchronization with the measures of the automatic accompaniment. Therefore, even beginners can effectively control the production of automatic accompaniment sounds.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing one embodiment of the present invention, Fig. 2 is a detailed circuit diagram showing the main parts of the same embodiment, and Figs. 3 and 4 are main parts showing other embodiments of the invention. FIG. 5 is a block diagram showing another embodiment of the present invention. 1...Upper keyboard, 2...Lower keyboard, 3...Pedal keyboard, 4...Melody sound forming circuit, 5...Amplifier,
6...Speaker, 7...Arpeggio mode selection switch, 8...SF mode selection switch, 9...
FC mode selection switch, 12, 14, 31, 6
1... Selector, 16... Arpeggio sound forming circuit, 19... Chord sound forming circuit, 20... Bass sound forming circuit, 23... Tempo counter, 24...
Pattern memory, 25...Rhythm sound source circuit, 2
7, 61... Sound generation control circuit, 30... Arpeggio note selection circuit, 36... Root note detection circuit, 37...
...Following sound forming circuit, 38, 39...Touch bar, 4
0...Adder, 41...Sound-driven addition data generation circuit, 47, 48...Flip-flop, 57...
Memory circuit, 58...Mode switch, 62...
Musical tone formation circuit, 63...Rhythm circuit.

Claims (1)

[Claims] 1. A first keyboard for playing chord tones, a second keyboard for playing bass tones, and automatic accompaniment sounds based on keys pressed on the first keyboard. automatic accompaniment sound generating means; first storage means for temporarily storing a key press detection output when a key is pressed on the second keyboard; and storage of the key press detection output in the first storage means. a second storage means for storing a signal at the beginning of a bar when a measure is detected; and a sound generation control means for stopping automatic accompaniment sounds generated from the automatic accompaniment sound generation means in accordance with the storage output of the second storage means. Automatic accompaniment device for electronic musical instruments. 2. The automatic accompaniment sound generation means generates a plurality of types of automatic accompaniment sounds, and the sound generation control means generates the automatic accompaniment sound depending on whether a key pressed on the second keyboard is a white key or a black key. The automatic accompaniment device for an electronic musical instrument according to claim 1, which stops a preset desired type of automatic accompaniment sound among the plurality of types of automatic accompaniment sounds generated from the means. 3. The automatic accompaniment sound generating means includes: a memory circuit that stores information on keys pressed on the first keyboard; and means for generating automatic accompaniment sounds based on the information on the keys stored in the memory circuit. An automatic accompaniment device for an electronic musical instrument according to claim 1. 4. The sound generation control means stops the automatic accompaniment sound generated by the automatic accompaniment sound generation means by clearing the memory of the memory circuit in accordance with the key press detection output on the second keyboard. An automatic accompaniment device for an electronic musical instrument according to scope 3. 5. The automatic accompaniment sound generation means generates a plurality of types of automatic accompaniment sounds, and the sound generation control means controls stopping from among the plurality of types of automatic accompaniment sounds generated by the automatic accompaniment sound generation means. An automatic accompaniment device for an electronic musical instrument according to claim 1, further comprising a selection means for selecting an automatic accompaniment tone. 6 A first keyboard for playing chord tones, a second keyboard for playing bass tones, and automatic accompaniment sound generation for generating automatic accompaniment sounds based on keys pressed on the first keyboard. a first storage means for temporarily storing a key press detection output when a key is pressed on the second keyboard; a second storage means for storing a signal in the bar and clearing the memory at the end of a measure; and stopping the automatic accompaniment sound generated from the automatic accompaniment sound generation means in accordance with the storage output of the second storage means; An automatic accompaniment device for an electronic musical instrument, comprising a sound generation control means for controlling the start. 7. The automatic accompaniment sound generation means generates a plurality of types of automatic accompaniment sounds, and the sound generation control means generates the automatic accompaniment sound depending on whether a key pressed on the second keyboard is a white key or a black key. 7. The automatic accompaniment device for an electronic musical instrument according to claim 6, which controls the stop and start of a preset desired type of automatic accompaniment sound among a plurality of types of automatic accompaniment sounds generated from the means. 8. The automatic accompaniment sound generating means includes: a memory circuit that stores information on keys pressed on the first keyboard; and means for generating automatic accompaniment sounds based on the information on the keys stored in the memory circuit. An automatic accompaniment device for an electronic musical instrument according to claim 6. 9. The sound generation control means stops the automatic accompaniment sound generated by the automatic accompaniment sound generation means by clearing the memory of the memory circuit in accordance with the key press detection output on the second keyboard. The automatic accompaniment device for an electronic musical instrument according to scope 8. 10 The automatic accompaniment sound generation means generates a plurality of types of automatic accompaniment sounds, and the sound generation control means determines whether to stop or start from among the plurality of types of automatic accompaniment sounds generated by the automatic accompaniment sound generation means. 7. The automatic accompaniment device for an electronic musical instrument according to claim 6, further comprising a selection means for selecting an automatic accompaniment tone to be controlled.