JPS6262359B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic musical instrument equipped with an automatic accompaniment function, and particularly relates to different start conditions for different types of automatic accompaniment.

Known automatic accompaniment functions for electronic musical instruments include automatic rhythm performance and automatic bass chord performance. Automatic rhythm performance generates a rhythm pattern signal according to the selected rhythm type, and generates percussion instrument sounds in accordance with this rhythm pattern signal. For automatic bass chord performance, specify the desired chord on the accompaniment keyboard (or key range),
A bass tone and chord constituent tones (chord tones) corresponding to this chord are generated according to a bass pattern and a chord pattern that match the automatic rhythm. Such automatic accompaniment is usually played at the same time as a manually played melody. That is,
After selecting the desired rhythm, simply play the melody on the melody keyboard (or keyboard range) and specify the desired chord on the accompaniment keyboard. Bass performance, automatic chord performance, and automatic rhythm performance are executed. Therefore, although a rich performance can be enjoyed with only simple keyboard operations, the following problems arise, especially for beginners.

In other words, if all types of automatic accompaniment sounds, such as automatic bass chord sounds and automatic rhythm sounds, are generated at the same time, it will be difficult for beginners to listen and confirm the individual automatic accompaniment sounds, and this will have implications for teaching purposes. It was not a good thing. This is because if you cannot sufficiently check each accompanist (especially chords and bass notes), you will not be able to memorize accurate chord and bass playing, and you will never be able to perform chords and bass playing on your own. First, there is a risk that performance technology will not progress.

By the way, a system in which automatic bass chord performance and automatic rhythm performance are executed and started independently is disclosed in Japanese Unexamined Patent Publication No. 1972-72115. Selection was based on mode selection using a dedicated switch. Therefore, it has not been possible to independently execute and start automatic performance of different functions in response to key press operations on different keyboard parts. Therefore, even if you combine this with the well-known automatic performance start function that synchronizes with key presses (synchro start function), when you select the mode in which automatic bass chord play and automatic rhythm play are performed together, you cannot press any key on the keyboard. If you press , synchronization will start at the same time, and if you select a mode that executes automatic bass chord play but not automatic rhythm play, you will not be able to start automatic rhythm play no matter what key you press on the keyboard. Nakatsuta.

This invention was made in view of the above points,
The purpose is to enable a part (for example, automatic bass chord performance) of a plurality of types of automatic accompaniment to be performed independently. To achieve this objective, the present invention is characterized in that the automatic accompaniment performances are not all started at the same time, but the conditions for starting the automatic accompaniment performances are varied depending on the type. In general, in electronic musical instruments equipped with an automatic accompaniment function, there is a keyboard section (for example, a keyboard for specifying chords) used for a certain type of automatic accompaniment performance (for example, automatic bass chord performance) and a keyboard section that is not directly used for automatic accompaniment. It also includes an unrelated keyboard section (for example, a melody playing keyboard). Therefore, in the present invention, if a key is pressed only on the keyboard part used for automatic accompaniment performance, only the type of automatic accompaniment performance (for example, automatic bass chord performance) corresponding to that keyboard part is started, The remaining types of automatic accompaniment performance (e.g. automatic rhythm performance) are performed on the condition that the keys are pressed on other keyboard parts (e.g. melody performance keyboard).
I'm trying to get it started. By doing this, if you press only a certain keyboard part, only the specific type of automatic accompaniment performance corresponding to that keyboard part will be executed, making it easy to hear and confirm the accompaniment sound. Become so. Moreover, all automatic accompaniment performances are automatically started by pressing all the keys on the keyboard, so normal automatic accompaniment performances can be performed without any problems.

By the way, since accompaniment is generally played along with the melody, it is preferable that the automatic accompaniment pattern is started in synchronization with the start of the melody performance. Therefore, in the present invention, the automatic accompaniment circuit includes a pattern generating means for generating a repetitive pattern of automatic bass chord performance and a repetitive pattern of automatic rhythm performance. Chord performance and automatic rhythm performance are executed, and the pattern generation means is controlled so that the repeating pattern of automatic bass chord performance and automatic rhythm performance is started from the initial state in synchronization with the start of key depression on the melody performance keyboard section. It is characterized in that it further includes a means to do so.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, the keyboard 10 consists of a melody playing keyboard section 10A and a chord playing keyboard section 10B. In electronic musical instruments equipped with two manual keyboards,
The keyboard portion 10A may be an upper keyboard, and the keyboard portion 10B may be a lower keyboard. In addition, in electronic musical instruments, one keyboard is divided into a high key range and a low key range.
It is preferable that the keyboard portion 10A be a high key range, and the keyboard portion 10B be a low key range. In short, keyboard parts 10A and 1
0B is a keyboard or key range corresponding to different performance modes.

The melody sound forming circuit 11 is a circuit for forming a musical sound corresponding to a key pressed on the melody performance keyboard portion 10A by adding a melody tone, envelope, pitch control, etc. The electronic musical instrument shown in the figure is equipped with two types of automatic accompaniment functions, one of which is a chord tone forming circuit 12 and a bass tone forming circuit 13 for automatic bass chord performance. A rhythm sound source circuit 14 is provided for the other function, automatic rhythm performance.

There are two modes for automatic bass chord performance: ``Finger Chord Mode'' and ``Single Finger Mode,'' and the performance is performed in one of these modes. "Fingard code mode"
In this case, press all the constituent notes of the desired chord on the chord playing keyboard part 10B, and then press the chord tone forming circuit 1.
2, the musical tones corresponding to all the pressed keys on the keyboard section 10B are set as chord tones, envelopes,
Formed with pitch control etc. In the case of "single finger mode", the root note of the desired chord is pressed on the chord playing keyboard part 10B, and the chord constituent notes (subordinate notes) are played using appropriate means based on the specified chord type and the root note. ) are formed by the SF subtone key data forming circuit 15, and musical tones corresponding to these key data are formed by the chord tone forming circuit 12. When the single finger mode selection switch SF-SW is turned on, the SF time subordinate key data forming circuit 15 operates and converts the key data of the chord composition temperature (subordinate note) into the root note key data and the chord type. Formed based on specified data. The chord type designation data is designated in a well-known manner using a separately provided chord type designation switch (not shown) or a part of the keyboard. When the finger chord mode selection switch FC-SW is turned on, the SF time follower key data forming circuit 15 does not operate, and the key data indicating the pressed key given from the keyboard portion 10B passes through the circuit 15. The signal is input to the chord tone forming circuit 12. The sounding timing of each chord constituent note formed into a musical sound by the chord sound forming circuit 12 is controlled according to the chord sounding timing pattern pulse CT given from the pattern memory 16, thereby providing a performance effect of automatically notching the chord. It will be done.

The pattern memory 16 generates base pattern data BP and rhythm pattern data RP in addition to the chord generation timing pattern pulse CH.
The base pattern data BT is data indicating the number of tones of the bass tones to be produced, and is generated corresponding to the timing at which the bass tones of the number of tones should be produced. The walking bass key data forming circuit 17 generates bass pattern data from the root of the chord specified to be pressed on the chord performance keyboard section 10B.
Pitch names that are separated by several pitches indicated by BP are found, and key data corresponding to the pitch names is input to the base tone forming circuit 13. The bass sound forming circuit 13 forms a musical sound having a note name corresponding to the key data given from the walking bass key data forming circuit 17 by adding a bass sound timbre, envelope, pitch control, etc. Further, a base sound generation timing pulse BT is provided to the base sound forming circuit 13 in correspondence with the generation timing of the base pattern data BP, and the generation timing of the base sound is controlled in accordance with the pulse BT.

The pattern memory 16 stores in advance automatic rhythm patterns, automatic bass patterns, and automatic chord patterns corresponding to a plurality of types of rhythms selectable by the rhythm select switch 18. The tempo counter 19 counts the tempo clock pulses TCP generated from the tempo clock oscillator 20 and receives various pattern data (RP, BP,
CT). The pattern memory 16 stores rhythm pattern data RP, base pattern data BP, or chord sound timing pattern pulses CT constituting a predetermined rhythm pattern, base pattern, or chord sound pattern corresponding to the rhythm selected by the rhythm select switch 18. The data are sequentially read out based on the output of the tempo counter 19.

The rhythm pattern data RP consists of sound generation timing pattern pulses corresponding to various percussion instruments, and is input to the rhythm sound source circuit 14 via the gate 21. In the rhythm sound source circuit 14, gate 2
Rhythm pattern data input via 1
A sound source signal of a percussion instrument sound indicated by RP is generated according to its sound generation timing. Melody sound formation circuit 1
1. The musical tone signals output from the chord tone forming circuit 12, the bass tone forming circuit 13, and the rhythm sound source circuit 14 are supplied to the sound system 35 and are generated.

A control circuit 22 provided in association with the pattern memory 16 is a circuit for controlling the start of automatic bass chord performance and automatic rhythm performance. A first any-key-on signal from the melody performance keyboard section 10A and the chord performance keyboard section 10B.
UAKO and the second any-key-on signal LAKO are output respectively, and these signals
UAKO and LAKO are input to AND circuits 23 and 24 in the control circuit 22, respectively. When any key is pressed on the melody performance keyboard section 10A, the first any key-on signal UAKO is "1".
Therefore, when any key is pressed on the chord playing keyboard section 10B, a second any key-on signal is generated.
LAKO becomes “1”. AND circuits 23 and 24
Other inputs include synchro start switch SS-
SW output is added. The control circuit 22 becomes operational when the synchro start switch SS-SW is turned on.

Flip-flops 25 and 26 provided in the control circuit 22 are synchronized start switches.
When SS-SW is off, the output "1" of the inverter 27 sets the reset state.
When the synchro start switch SS-SW is turned on, the output of the switch SS-SW becomes "1", and the AND circuits 23 and 24 become operable, and the output of the inverter 27 becomes "0", and the flip-flop The resets of 25 and 26 are released. In this state, the melody playing keyboard section 10
When any key is pressed at A, the first any-key-on signal UAKO becomes "1", and the output "1" of the AND circuit 23 is applied to the set input (S) of the flip-flop 25. Also, when any key is pressed on the chord performance keyboard section 10B, the second
The any-key-on signal LAKO becomes "1", and the output "1" of the AND circuit 24 becomes the flip-flop 2.
6 set input (S).

The control circuit 22 controls to start automatic bass chord performance when the output (Q) of the flip-flop 26 is "1", and to start automatic rhythm performance when the output (Q) of the flip-flop 25 is "1".

First, a case will be described in which only automatic bass chord performance is started. No key depression operation is performed on the melody performance keyboard section 10A, but a desired chord designating key depression operation is performed only on the chord performance keyboard section 10B. Then, an any key-on signal is generated in response to the first key pressed on the keyboard portion 10B.
The flip-flop 26 is set based on LAKO, and the output (Q) of the flip-flop 26 rises to "1". The output “1” of the flip-flop 26 is sent to the pattern memory 1 via the OR circuit 28.
6 and the enable input (EN) of the tempo counter 19, the memory 16 is set to a read operation enabled state, and the counter 19 is set to a count operation enabled state. Further, when the output (Q) of the flip-flop 26 rises to "1", one pulse is output from the differentiating circuit 29 and is applied to the AND circuit 30. A signal obtained by inverting the output (Q) of the flip-flop 25 by an inverter 31 is applied to the other input of the AND circuit 30.
At this time, since the flip-flop 25 has not yet been set, its output (Q) is "0".
AND circuit 3 due to the output “1” of inverter 31
0 is operational. Therefore, differentiator circuit 2
The output pulse of 9 passes through the AND circuit 30 and is applied to the reset input (R) of the tempo clock oscillator 20 and the tempo counter 19 via the OR circuit 32. This sets the oscillator 20 and counter 19 to the initial state. Therefore, in synchronization with the first key depression on the chord performance keyboard portion 10B, the tempo counter 19 starts operating from the initial state, and various pattern data (RP, BP, CT) are read from the pattern memory 16 from the initial state.

Based on the base pattern data BP and chord sound timing pattern pulse CT read out from the pattern memory 16, and the chord specifying key press operation on the chord playing keyboard section 10B, the chord tone forming circuit 12 and the bass tone forming circuit 13 perform A musical tone is formed. On the other hand, the output (Q) of the flip-flop 25 is input to the enable input (EN) of the gate 21 via the OR circuit 33, and in this case, the output (Q) of the flip-flop 25 is still "0". ”, so the gate 21 is inoperable. Therefore, the rhythm pattern data RP read from the pattern memory 16
is blocked by the gate 21, and the rhythm sound source circuit 14
cannot be given to Therefore, only automatic chord tones (chords) and automatic bass tones are generated in response to key depressions on the chord performance keyboard portion 10B, and no automatic rhythm tones are generated.

If you want to listen to only the automatic bass chord performance for learning bass accompaniment and chord accompaniment, turn on the synchro start switch SS-SW as described above, and use only the chord performance keyboard section 10B to listen to the desired chord performance. All you have to do is press the key to specify the chord. Next, a case will be described in which normal automatic accompaniment performance is performed using both automatic bass chord performance and automatic rhythm performance.

Since the accompaniment performance accompanies the melody performance, when performing a normal automatic accompaniment performance, some key depression operation is always performed on the melody performance keyboard section 10A. The flip-flop 25 is set based on the first any-key-on signal UAKO generated when the first key depression operation for the melody tone is performed, and the output (Q) of the flip-flop 25 rises to "1". In response to this rising edge, one pulse is output from the differentiating circuit 34, and the tempo clock oscillator 20 and tempo counter 19 are reset via the OR circuit 32. Furthermore, the output “1” of the flip-flop 25 is output from the OR circuit 33.
is applied to the enable input (EN) of the gate 21 via the OR circuit 33 and the OR circuit 2
8 to the enable input (EN) of the pattern memory 16 and tempo counter 19.
Therefore, various pattern data (RP, BP, CT) are read from the pattern memory 16 from the initial state in synchronization with the first key depression operation on the melody performance keyboard portion 10A. At this time, since the rhythm pattern data RP is applied to the rhythm sound source circuit 14 via the gate 21, automatic rhythm performance is started in response to the start of key depression on the melody performance keyboard section 10A. Note that automatic bass notes and chords are not generated just by generating the bass pattern data BP and the chord sounding timing pattern pulse CT, so when the chord specifying key press operation is performed on the chord playing keyboard section 10B, the automatic bass notes and chords are not generated. is started.

If a key press operation starts on the chord performance keyboard section 10B before the start of a key press on the melody performance keyboard section 10A, the subsequent keyboard section 10
In synchronization with the start of pressing key A (by the output pulse of the differentiating circuit 34), the read address of the pattern memory 16 is returned to the initial state. On the other hand, if a key press operation is started on the chord performance keyboard section 10B after the start of a key press on the melody performance keyboard section 10A, the read address of the pattern memory 16 is not returned to the initial state and the pattern is Automatic bass notes and automatic chords are sounded from the middle of . This is because if the flip-flop 25 is already in the set state, the output "0" of the inverter 31 makes the AND circuit 30 inoperable and the output pulse of the differentiating circuit 29 is blocked. The reason why the start of the automatic accompaniment pattern is synchronized with the start of key presses on the melody performance keyboard section 10A is that the original automatic accompaniment performance (not for teaching purposes) is performed in conjunction with the melody performance. This is because it is something that

In addition, rhythm start switch START-SW
is for forcibly starting automatic rhythm performance regardless of the control by the control circuit 22. When the switch START-SW is turned on,
A signal "1" is applied to the OR circuit 33, resulting in the same state as when the flip-flop 25 was set. Therefore, automatic rhythm performance is performed regardless of key depression operations. If a key is pressed on the chord playing keyboard section 10B at this time, automatic bass chord playing is also executed.

As explained above, according to the present invention, the starting conditions for different types of automatic accompaniment performance can be made different, so that only a specific type of automatic accompaniment performance can be executed, and accompaniment performance training can be performed. It has the effect of being suitable for Furthermore, it is possible to switch from a state in which a specific type of automatic accompaniment performance is performed by pressing only one keyboard part to a normal playing position using both keyboard parts without any problem. There is also the effect that it is possible to shift to automatic accompaniment performance (of the type described above).

In addition, since the automatic bass chord play and automatic rhythm play repeat patterns are started from the initial state in synchronization with the start of key presses on the melody performance keyboard, the automatic accompaniment pattern can be synchronized with the start of melody play. It also has the effect that it can be started from an early stage, and automatic accompaniment that is in harmony with the melody performance can be performed.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of an electronic musical instrument according to the present invention. 10...Keyboard, 10A...Keyboard part for playing melody, 10B...Keyboard part for playing chords, 11...
Melody sound forming circuit, 12... Chord musical tone forming circuit, 13... Bass sound forming circuit, 14... Rhythm sound source circuit, 22... Control circuit, SS-SW... Synchro start switch, START-SW... Rhythm. Start switch.

Claims (1)

[Claims] 1. A keyboard section for playing chords, a keyboard section for playing melody, and automatic bass chord playing in response to pressed keys in the keyboard section for playing chords, and in response to an automatic rhythm start signal. an automatic accompaniment circuit that performs automatic rhythm performance using the keyboard; and an automatic accompaniment circuit that starts automatic bass chord performance only in response to key press operations on the chord performance keyboard section; and control means for applying the automatic rhythm start signal to the automatic accompaniment circuit in response to the above, and causing the automatic accompaniment circuit to start automatic rhythm performance. 2. Execute automatic bass chord performance in response to pressed keys in a keyboard section for chord performance, a keyboard section for melody performance, and the chord performance keyboard section, and execute automatic rhythm performance in response to an automatic rhythm start signal. an automatic accompaniment circuit that causes the automatic accompaniment circuit to start only automatic bass chord playing in response to a key press operation on the chord performance keyboard portion; An electronic musical instrument comprising control means for applying a rhythm start signal to the automatic accompaniment circuit and causing the automatic accompaniment circuit to start automatic rhythm performance, wherein the automatic accompaniment circuit is configured to control the repetition pattern of automatic bass chord performance and the automatic rhythm performance. The apparatus includes a pattern generating means for generating a repetitive pattern, and performs automatic bass chord performance and automatic rhythm performance according to each repetitive pattern generated by the pattern generating means, and upon the start of a key press on the melody performance keyboard part. The electronic musical instrument further comprises means for controlling the pattern generation means so that the repetition pattern of the automatic bass chord performance and automatic rhythm performance is started from an initial state in synchronization.