JPS59189395A - Automatic accompanying apparatus for electronic musical instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an automatic accompaniment device for an electronic musical instrument, which enables automatic accompaniment with a wide variety of variations by detecting a key performance pattern and automatically changing and controlling the accompaniment pattern. It is.

Conventionally, in automatic accompaniment devices for auto chords, auto chords, and auto bass Kasa, in order to eliminate the monotony of automatic accompaniment, a fill-in switch was provided on the panel of the electronic musical instrument, and this switch was operated during performance. The accompaniment pattern was changed from a normal pattern to a fill-in pattern for a certain period of time.

However, it has been extremely difficult for beginners and others to judge the progress of the keyboard performance and operate the fill-in switch at an appropriate timing without hindering the performance.

An object of the present invention is to provide a new automatic accompaniment device that can automatically change accompaniment patterns.

The automatic accompaniment device for an electronic musical instrument according to the present invention detects a key performance pattern based on key press operations on a keyboard, compares the key performance pattern with a pre-stored performance pattern, and creates an accompaniment pattern according to the comparison result. The present invention is characterized by change control, and an embodiment shown in the accompanying drawings will be described in detail below.

FIG. 1 shows the circuit structure of an electronic musical instrument according to an embodiment of the present invention, and this electronic musical instrument is equipped with an automatic accompaniment device having autorhythm, autochord, and autobass functions.

The upper keyboard circuit 10 generates key press data UKD corresponding to keys pressed on the upper keyboard.
is supplied to the melody musical tone forming circuit 12 and converted into a corresponding musical tone signal. The musical tone signal from the musical tone forming circuit 12 is supplied to the speaker 16 via the output amplifier 14, where it is converted into sound and played.

The registration control switch 18 is turned on when registering a special performance pattern, such as the one shown by a group of notes in FIG. It is something. That is, when the switch 18 is turned on and the upper keyboard shows a special performance pattern, which part of the song is played, the recognition memory circuit 20
recognizes a performance pattern based on the key press data Ui (D) from the upper keyboard circuit 10, and stores pattern data indicating this performance pattern in a register or the like.

The pattern data can be composed of event data indicating a key press or key release event and time data indicating a relative time between events. Time data is tempo oscillator 2
This method is advantageous in that it can be synchronized with the rhythm by counting the tempo clock signal from 2. The above-mentioned Hiko Bakun data can also be obtained by using the on/off operation of a separately provided switch instead of using the keyboard performance. Alternatively, the pattern data may include information regarding the pitch of the pressed key.

When the above-mentioned flexible memory circuit 20 is provided, the performer can select the fill-in pattern 111 in the music to be played.
It is best if one person selects a desired part and registers the special performance pattern just before that part in the recognition memory circuit 20.

Incidentally, it is also possible to make the operation for registering the performance pattern sluggish, and for this purpose, it is possible to replace the recognition memory circuit 20 with a read-only memory or the like that stores the desired performance pattern. good.

The key performance pattern recognition and storage circuit 24 recognizes a key performance pattern based on a series of key press data UKD supplied from the upper keyboard circuit 0 after the start of music performance, and stores pattern data indicating this key performance pattern in a shift register. etc. In this case, pattern data is formed using the above-mentioned recognition storage circuit 2 using the tempo clock signal TCL.
It can be done in the same way as in 0. For example, the pattern data for one measure stored in the shift register is sequentially shifted as the performance progresses so that each time a new key is not pressed or pressed, the key press status is reflected in the stored key performance pattern.

Comparison circuit 26 compares the pattern data from recognition storage circuits 20 and 24 with each other, and if they match, outputs a match signal E.
This coincidence signal EQ is supplied to the R-S flip-flop 28 to set the RS flip-flop 28. When set n, the flip-flop 28 supplies a fill-in mode signal F I L-'''1'' to the introduction pattern memory circuit 30.

The introduction pattern memory circuit 30 stores data indicating a normal pattern and data indicating a fill-in pattern as turn data for each rhythm of 1 MM.

The rhythm selection device 32 includes a rhythm selection switch corresponding to a plurality of rhythm types (march, waltz, rumba, etc.), and when the rhythm selection switch corresponding to a specific rhythm type is turned on, the selection of the specific rhythm type is performed. An instructing rhythm selection signal is supplied to an accompaniment turn memory circuit 30.

The counter 34 counts the tempo clock signal TCL, and generates a bar clock signal MP for each bar phrase, and repeatedly supplies counting output for, for example, two bars to the accompaniment pattern memory circuit 30. ing.

When the rhythm selection device 32 generates a rhythm selection signal corresponding to a specific rhythm type, the accompaniment pattern memory circuit 30
Then, accompaniment pattern data corresponding to a specific rhythm 9i type is read out repeatedly according to the count output of the counter 34,
As a result, the bass sound control data BS, chord timing signal CDT, and rhythm timing signal RP are sent out from the distance playing pattern memory circuit 30 in accordance with the distance playing pattern that includes the selected rhythm &a and the phantom YG. Here, each bass sound generation control data BS indicates the pitch of the bass note to be produced with respect to the root note of the chord, the chord timing signal CDT indicates the sound generation timing of the chord, and the rhythm timing signal RP indicates the pitch for each type of musical instrument. This shows the song drive timing.

The accompaniment pattern data read out in the accompaniment pattern memory circuit 30 is the fill-in mode signal FIL="0".
When the fill-in mode signal FIL-" is 11, it is the fill-in pattern data. Therefore, the -E-)" signal FIL-"
Bass sound control data BS and chord timing 41 that were generated according to the normal pattern when Om.
CDT and rhythm timing signal RP are mode signal F.
When IL becomes ``1'', it begins to be generated according to the fill-in pattern.

The lower keyboard circuit 36 generates key press data LKD corresponding to a key pressed on the lower keyboard.
D is supplied to a chord tone forming circuit 38, where it is converted into a corresponding chord signal.

The chord tone forming circuit 38 sends out a formed chord signal at the sound generation timing indicated by the chord timing signal CDT. The chord signal from the musical tone forming circuit 38 is supplied to the speaker 16 via the output amplifier 14, where it is converted into sound.

The key press data LKD from the lower keyboard circuit 36 is also supplied to a chord name detection circuit 40. The chord name detection circuit 40 detects a chord name based on the key press data LKD, and supplies the chord name data CND to the pace key data forming circuit 42.

The pace key data forming circuit 42 generates chord name data CHD.
and base sound production control data BS to form pace key data corresponding to the bass sound to be produced,
For example, if the chord name data CND includes root note data indicating the root note of the chord, pace key data is formed by adding this root note data and base sound generation control data BS.

The pace key data from the pace key data forming circuit 42 is supplied to a bass tone forming circuit 44, where it is converted into a corresponding bass tone signal. The bass sound signal from the musical tone forming circuit 44 is sent to the speaker 16 via the output amplifier 14.
The sound is converted into sound.

The rhythm percussion instrument sound forming circuit 50 includes various percussion instrument sound sources, and generates percussion instrument sound signals by driving these percussion instrument sound sources in accordance with the rhythm timing signal RP.

The percussion instrument sound signal from the percussion instrument sound forming circuit 5o is supplied to the speaker 16 via the output amplifier 14 and converted into sound.

Next, the fill-in control operation in the electronic musical instrument will be explained with reference to FIG.

Before starting to play a melody on the upper keyboard, a performance pattern as shown in FIG. 2 is registered in the special performance pattern recognition and storage circuit 20 as described above.

When a melody is played on the upper keyboard, as the performance progresses, the rhythm, chords, and pace progress according to a normal pattern. When the melody performance of one measure including the registered pattern is completed, the key performance pattern recognition and storage circuit 24 supplies the pattern data of ltJ-section corresponding to the registered pattern to the comparison circuit 26.

The comparison circuit 26 compares the pattern data from the recognition storage circuits 2o and 24 and, since they match, generates a match signal EQ. This coincidence signal EQ sets the flip-flop 28, which has been reset by the bar pulse MP preceding n, so that the flip-flop 28 outputs a fill-in signal -"1".

When this fill-in mode signal FIL = "1" is supplied to the accompaniment pattern memory circuit 3o, this circuit 30 generates the base tone control data B according to the fill-in pattern.
S, generates a chord timing signal CDT and a rhythm timing signal RP.

Therefore, the rhythm, chord, and bass accompaniment progress according to the fill-in pattern.

Thereafter, when the melody performance of the 1/J- section following the measure containing the registered pattern is finished, the counter 34 generates a measure pulse MP, and the clip-flop 28 is reset in response to this measure pulse MP. Fill-in mode signal F I Lid: becomes “0” in response to this. Therefore, the rhythm, chord, and bass accompaniment progress according to the normal pattern.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be implemented in appropriately modified forms, for example, as in the following (1) to (3).

(1) A plurality of performance patterns corresponding to a plurality of fill-in patterns are prepared, and each time a key performance pattern corresponding to each performance pattern is detected, a corresponding fill-in pattern is automatically inserted.

In this way, a switch for selecting N types of fill-in patterns can be omitted, and there is no need to operate this switch.

(2) Perform fill-in control independently for each musical tone type such as rhythm, chord, bass, etc. i.e. rhythm, chords,
Prepare multiple performance patterns corresponding to each fill-in control of the bass, and each time a key performance pattern corresponding to each guest pattern is detected, select the rhythm fill-in pattern in the case of rhythm. Fill-in pattern for chord: If y and base are seeded, a fill-in pattern for the base is automatically inserted. In this way, a plurality of fill-in switches for rhythm, coat, bass, etc. that should be provided on the panel surface can be omitted, and there is no need to operate each switch independently.

(3) If it is possible to detect not only the key performance pattern of the melody gong board but also the key performance pattern of the chord keyboard, bass @ board, etc., multiple types of keys as described in (1) above can be detected. Fill-in control using a fill-in pattern or fill-in control for each musical tone type as described in (2) above is easy to perform, and even more detailed control is possible.

As described above, according to the present invention, since the accompaniment pattern is automatically changed and controlled without requiring any switch operations, even beginners can enjoy automatic accompaniment that is rich in variety. Further, as shown in the above embodiment, if a desired performance pattern can be registered before the performance starts, there is an advantage that the performer can freely set the accompaniment pattern change timing.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the circuit configuration of an electronic musical instrument according to an embodiment of the present invention, and FIG. 2 is a time chart for explaining the fill-in control operation in the electronic musical instrument of FIG. DESCRIPTION OF SYMBOLS 10... Upper keyboard circuit, 20... Special performance pattern recognition memory circuit, 22... Tempo oscillator, 24... Key performance pattern recognition memory circuit, 26 River comparison circuit, 3o...
Accompaniment pattern memory circuit, 36...lower keyboard circuit, 38
. . . Musical sound formation circuit for chords, 44 . . . Musical sound formation circuit for bass, 50 . . . Percussion instrument sound formation circuit for rhythm. Patent applicant: Nippon Musical Instruments Manufacturing Co., Ltd. Representative patent attorney: Toshiaki Izawa

Claims (1)

[Claims] a keyboard means, a recognition means for recognizing a congruent performance pattern based on key press operations on the keyboard means, a storage means for storing a predetermined performance pattern, and a comparison for comparing the key performance pattern and the predetermined performance pattern. An automatic accompaniment device for an electronic musical instrument, comprising a circuit, an accompaniment means for generating an accompaniment sound signal according to an accompaniment pattern, and a control means for changing and controlling the accompaniment pattern in accordance with an output signal from the comparison circuit.