JPS6228796A - Automatic rhythm performer - 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 [Technical Field of the Invention] The present invention relates to an automatic rhythm performance device that can change rhythm patterns.

[Prior art and its problems] Conventionally, such automatic rhythm performance devices have been able to determine the progression of chords being played and change the rhythm pattern. In order to make this determination, it is necessary to determine the degree of change in the root note and the degree of change in the type of chord, making the determination process complex and difficult.

[Object of the Invention] This invention was made in view of the above-mentioned circumstances, and its object is to provide an automatic rhythm performance device that changes rhythm patterns through simple processing. .

[Summary of the Invention] In order to achieve the above-mentioned object, the main point of the present invention is that the rhythm pattern is changed depending on the key press timing or key press time of the melody key and a specified chord. be.

[Configuration of Example] An embodiment of the present invention will be described in detail below with reference to the drawings.

Figure 2 shows the overall circuit of the automatic rhythm performance device.
[9 out of 1 is a pattern memory, where the base pattern data's ephemeral rhythm is stored in three patterns: normal, variation, and fill-in, as shown in Figure 3, and these three butters are further , rock, disco, waltz, etc., and this rhythm is selected by a predetermined rhythm switch (not shown).

When the rhythm start/stop switch 16 is operated,
The address data of the address counter 11 is incremented at a speed corresponding to the set tempo of the tempo controller 12, and is given to the pattern memory 9 as a read address, and the normal rhythm pattern data is read out and input to the rhythm summation forming circuit 13. , a normal rhythm sound is generated and emitted from the speaker 15 via the amplifier 14.

In addition, the base pattern data is read out from the pattern memory 9 together with the normal rhythm pattern data, and the root note data from the chord determination circuit 3 is added in the adder 17 and input to the accompaniment tone forming circuit 4. , normal bass tones and chord tones are generated and emitted from the speaker 15 via the amplifier 14.

The depression of the melody key @5 is detected by the key depression detection circuit 6,
The detection signal is stored in the key press state storage device fi8, and the key press state storage device 8 stores the key press time as "12" for one beat and "48" for one bar, depending on the tempo set by the tempo controller 12. is counted at a counting speed of l small part "4".
8'' and the address counter 11 gives a carry signal after incrementing the address by one measure, or it is cleared when a new key is pressed. The count value T of the key press time in the key press-shaped IS storage device 8 is stored in the judgment circuit 10, and when it exceeds ``24'' for two beats, a variation instruction signal '3 is sent from the judgment circuit 10 to the pattern memory 9. Then, the rhythm pattern data is switched from normal to variation, and when one measure of "48" is reached, a fill-in instruction signal is applied from the determination circuit 10 to the pattern memory 9 until the key is released, and the rhythm pattern data is changed. is further selected from variation to fill-in.

Further, the pressed key of the accompaniment key IT is detected by the pressed key detection circuit 2, and the chord corresponding to the pressed key is determined by the chord determination circuit 3, and root note data is generated and preset in the chord information storage device 18. The 0 judgment circuit 10, which is inputted to the judgment circuit 10, detects a change in the root note of the given chord at the break of the measure during which the variation/fill-in instruction signal is being output, and a change in the variation/fill-in instruction signal. The output is stopped and the normal state is restored.

A pressed key on the melody keyboard 5 is detected by a pressed key detection circuit 6, a musical tone having a pitch corresponding to the pressed key is generated by a musical tone forming circuit 7, and is emitted from a speaker 15 via an amplifier 14.
Furthermore, the pressed key of the accompaniment key fit is also detected by the pressed key detection circuit 2, the chord corresponding to the pressed key is determined by the chord determination circuit 3, and chord pattern data is generated. The pattern data is also added and inputted to the accompaniment sound forming circuit 4, and the court sound and the bass tone are generated and emitted from the speaker 15 via the amplifier 14.

['X: Example 0 operation] Next, the operation of this embodiment will be described.

Now, assume that a rock rhythm is selected and a melody is played.

First, when the rhythm start stop switch 16 is operated, the address counter 11 is incremented, and the normal rhythm pattern data shown in FIG. 3 (1) is read out from the pattern memory 9 and output as sound. When you press a melody key on the melody keyboard 5 in addition to the accompaniment key on the accompaniment keyboard 1 at the beginning of a measure in a bass or rhythm performance, the pressed key state storage device 8 stores the keys for this melody! !
A key press on the board 5 is detected (step S1), the key press time count value T is cleared, and based on the data from the address counter 11, it is determined whether it is a bar break or an am.
The key press time count (IT) is incremented at a rate of ``12'' per beat until the key press time count value T exceeds ``24'' (steps S2 to S6).

Then, when the key press time count value T exceeds "24",
'I determination circuit O determines that the nolodie key has been pressed for two beats (step S6), changes the variation instruction signal to the pattern memory 9, and emits the variation pattern shown in Figure (2) of m3. (step S7). Next, the key press time count value T is incremented at a rate of ``12'' per beat until the key press time count value T exceeds ``47''. (Step 58 - S l O).

Furthermore, if the key press time count value T exceeds "47",
The determination circuit 10 determines that the melody key has been held down completely for one measure (step 510), and the operating key for the root note of the accompaniment W board L remains unchanged and changes to the root note data from the chord information storage device 18. If there is no fill-in instruction signal, the fill-in instruction signal is given to the pattern memory 9, and the fill-in pattern shown in FIG. 3 (3) and JSA diagram (3) is output as sound (
In step Sll, 312), the determination circuit 10 continues to output this fill-in instruction signal until the melody key is released, maintains a fill-in state, and continues to be depressed even when the next bar break is reached. If there is no change in the root note data, the fill-in instruction signal is continued to be output to maintain the fill-in state, and when the key is released, the output of the fill-in instruction signal is stopped and the normal state is returned (step SL3).
〜5179゜In this way, as shown in Figure 1 (1), the rhythm pattern changes automatically by simply holding down the same key, and the process of changing the rhythm pattern consists of a simple key press time counting process and this It is sufficient to process only the count value ``I''.

Also, if you keep pressing the melody key on the melody keyboard 5 from the 3rd beat point (timing) in the middle of the measure, the count will start from this point, and the measure will start counting before reaching the count value of "24" for 2 beats. Since the key press time count value T is cleared when the break is reached (steps S5 and S2),
As shown in FIG. 1 (2), the pareition pattern begins on beat 1 of the next measure, and the fill-in pattern begins on the next measure. Furthermore, if the key is released before the fill-in state has elapsed for one measure, as shown in Figure 1 (
As shown in 3), the normal state will be returned immediately with the maki Q (steps 513 and 517). This is the same in the case of variations, and before the state of the variation has passed for two beats, When the key is released, as shown in FIG. 1 (4), the normal state is immediately returned (step S9.517).

In this way, when the melody key is held down, the rhythm pattern changes, relieving the monotony of repeating the same melody note.

Also, as shown in Figure 1 (5) and Figure 1 (6), there are bar breaks during variations and fill-ins, and at this point the operating key at the root of the accompaniment keyboard L changes, starting from the C chord. When the root note of a chord changes, such as from a C chord or from a C chord to a B chord, the I constant circuit 10 detects this from the change in the root note data from the chord information storage device 18.
In addition, Stella 7'S11.515) stops outputting the variation and fill-in instruction signals and returns to the normal state (step 517).

In this way, the rhythm pattern can be changed even by changing the root note of the chord, making it possible to perform a variety of performances.

In this case, even if the root note of the chord is 9ized during normal, the normal state is maintained and no change occurs in the rhythm pattern, as shown in 1n(7)(8).

Note that the present invention is not limited to the above-mentioned embodiments, and can be modified and applied in various ways without departing from the scope of the present invention. It is possible to use RAM, etc. to store data, to increase the number of types of rhythm patterns, to set the point at which the rhythm pattern is switched to another time, to switch the rhythm pattern not only by the root rf but also by changes in the type of chord, and to use it for accompaniment. It is also possible to start reading out the rhythm pattern data when the chord pattern data is received by the determination circuit 10 due to the start of the operation of the keyboard 1.

[Effects of the Invention] As explained in detail above, the present invention can perform the following operations according to the key depression timing or key depression time of the melody key and the designated chord.
Since the rhythm pattern is changed, simply by continuing to press the same melody key, the rhythm pattern will change automatically, and the processing for changing the rhythm pattern is a process of counting the key press time and a process of determining this count value, or All you have to do is detect the key press timing, and you can change the rhythm pattern quickly, allowing for smoother performances.If you keep pressing the melody key, the rhythm pattern changes and the same melody sound is played. In addition to easing the monotony of continuous playing, the rhythm pattern also changes depending on the chord change, so you can enjoy a varied and timeless performance.

[Brief explanation of the drawing]

Figure 1 is a diagram showing how the rhythm pattern changes depending on the melody key press time and specified chord, Figure 2 is the overall circuit diagram of the automatic rhythm performance bag, and Figure 3 is the pattern memory 9.
FIG. 4 is a flowchart for changing the rhythm pattern. ■...Accompaniment keyboard, 2...Key press detection circuit, 3...Chord judgment circuit, 5...Melody river keyboard, 6... ...Key press detection circuit, 8...
. . . key press state storage device, 9 . . . pattern memory, 10 . . . determination circuit.

Claims (3)

[Claims] (1) A storage means for storing rhythm patterns for normal rhythms and rhythms other than normal rhythms, and a sound emitting means for selecting rhythm patterns for normal rhythms and rhythms other than normal rhythms in this storage means and emitting rhythm sounds. , a detection means for detecting key press timing or key press time of a melody key, a chord discrimination means for discriminating a designated chord, and said storage means based on the detection result of said detection means and the discrimination result of said chord discrimination means. An automatic rhythm performance device comprising a selection switching means for switching and selecting a rhythm pattern to be selected. (2) The selection switching means is a means for switching and selecting the normal rhythm when there is a change in the chord when a rhythm pattern for a rhythm other than the normal rhythm is selected. automatic rhythm playing device. (3) The automatic rhythm performance device according to claim 1, wherein the storage means is means for storing a plurality of rhythm patterns of rhythms other than normal rhythms.