JPS6028000B2 - automatic rhythm accompaniment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic rhythm accompaniment device including a so-called fill-in circuit that is inserted for a short time when switching from a certain variation rhythm pattern to another variation rhythm pattern.

In conventional automatic rhythm accompaniment devices for electronic musical instruments, the transition from a basic rhythm pattern or a changeable rhythm pattern to another pattern is performed when desired. There was an audible unnaturalness.

On the other hand, when playing drums, a "switching rhythm" is inserted so as to continuously change the performance pattern, and this is called a "fill-in." SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic rhythm accompaniment device that generates other rhythms such as the above-mentioned fill-in even in an electronic musical instrument and can provide an aurally natural accompaniment rhythm.

Embodiments of the present invention shown in the drawings will be described below.

FIG. 1 shows a block diagram of the embodiment, in which 1 is a basic rhythm pattern designation signal generation circuit, 2 is a variation rhythm pattern designation signal generation circuit, and 3 is a rhythm other than the basic rhythm pattern/accompaniment rhythm pattern, such as a so-called fill-in rhythm. This shows a signal source circuit for obtaining . 4 is a demodulator, and 5 is a rhythm pattern generation circuit that stores all patterns of basic rhythm and accompaniment rhythm.
), 6 is a sequential pulse generation circuit, 7 is a clock pulse oscillator, 8 is a pulse frequency reducer, 9 is a sound source circuit, 1 is an amplifier circuit, and 11 is a speaker.

As specific components of the grain rhythm pattern signal generation circuit 2 and the signal source circuit 3, 21 is a preset selection switch;
2 is an up-down counter, 23 is a delay type flip-flop, 24 is a step-up switch for changing the accompaniment rhythm pattern, 25 is also a step-up switch, 26 is a step-up or down extreme value detector, A ，
, A2, ○ are logic operation circuits, 31 and 32 are pulse oscillation sources for obtaining rhythms other than the basic rhythm and variation rhythm,
, A4, A5, A6, 02, and 03 indicate logic operation circuits.

The pulse oscillation sources 31 and 32 may be frequency-divided appropriately by the pulse frequency reducer 8, or the clock pulse oscillator 7 may be combined with another frequency divider, and the pulse oscillation sources 31 and 32 may be frequency-divided as appropriate by the pulse frequency reducer 8. It is desirable to be present. In the basic rhythm pattern designation signal generation circuit 1, a 3-bit signal is input to the demodulator 4 and demodulated by selecting a preset selection switch (not shown), and becomes a signal for determining the address of the rhythm pattern generation circuit ROM5. 3 bits only).

For the variable rhythm pattern designation signal generation circuit 2, an initial value is determined by a preset selection switch 21, and the value is entered into an up/down counter 22. The output of the counter 22 becomes the lower two bits that determine the address of the ROM 5, and the address after demodulation is determined. If the address designation pattern from the demodulator 4 applied to the ROM 5 is a variation pattern m, then the R
It becomes the output of OM5 and reaches the sound source circuit 9. The sound source circuit 9 operates in a known manner and generates a variation pattern m, which can be heard through the speaker 1. At this point, the step-up switch 24 is switched to apply a positive voltage to the AND circuit A, and at the same time, that positive voltage is also applied to the AND circuit (here, when changing from the variation pattern m to the pattern W), the positive voltage is applied to the AND circuit A. ) The circuit of the flip-flop 23 does not operate immediately with the signal that has passed through the AND circuit A, and the OR circuit ○, but instead uses the pulse number designation pulse obtained by dividing the clock pulse by the frequency reducer 8. Depends on the state. In other words, the output Q of the flip-flop 23 becomes ``H'' (/-level) when ``H'' (positive voltage in this case) is applied to the input D from the OR circuit ○, and the number of beats increases. Occurs when the specified pulse rises.

As shown in the time chart in Fig. 2, if the time relationship in which "H" of the step-up switch 24 is applied with respect to the pulse rate designation pulse (Fig. 2 A) is between hours UT and T. The output Q of the flip-flop 23 remains "H" without changing.

The "H" of the switch 24 and the Q (E in FIG. 2) of the flip-flop 23 are applied to the band circuit A5, and the output "H" further reaches the band circuit A5. Therefore, the pulse being applied to the other side of A5 is OR circuit 0 from the output of A5 in that form.
3 and reaches the sound source circuit 9 (see Figure 2 F).
. Therefore, a desired fill rhythm Q in FIG. 2 can be formed in the sound source circuit 9, and can be heard from the speaker 11 by playing it in the variation rhythm pattern (see D in FIG. 2). Note that the OR circuit 02 allows the output of the AND circuit A3 to be sent to a separate sound source circuit 9.
When the fill-in rhythm is stopped so as not to generate an instrument rhythm similar to the rhythm sound generated by the output of the OR circuit 03, the fill-in rhythm can be clearly heard. (For example, if the continuous hitting sound of a snare drum is made to correspond to a fill-in rhythm, the snare drum sound in the pattern specified by the pattern generation circuit 5 is not generated).

Variation rhythm pattern m does not change even after time T, (
If the step-up switch 24 is operated again before time UT2 (because the beat rate did not match the designated pulse), a fill-in rhythm will occur from time T2 onwards, and a fill-in rhythm will occur at time T2. At the end of the rhythm, the variation rhythm pattern M changes to the variation rhythm pattern W.

If the step-down switch 25 is operated just before time T4, a fill rhythm will also occur at that time (this fill rhythm will feel good if the pulse period is different from the previous one), and when the step-down switch 25 is finished, the fill rhythm will occur. Changes to variation rhythm pattern m. Further, it is also possible to adopt a configuration in which the output applied from the OR circuit 02 to the sound source circuit 9 does not generate the original variation rhythm pattern at all.

At this time, only the fill-in rhythm is generated from the speaker, and the fill-in becomes particularly active. In this way, according to the present invention, when a basic rhythm pattern or a modified rhythm pattern changes to another pattern, another rhythm is inserted for a short time immediately before the change, so that the rhythm pattern can be maintained without any audibly unnatural changes. can be changed.

Inserting the fill-in rhythm by operating the switch that matches the pulse number designation pulse confirms that the accompaniment rhythm pattern has been switched. Therefore, an extremely effective automatic rhythm accompaniment device is obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a time chart for explaining the operation of FIG. 1...Basic rhythm pattern designation signal generation circuit,
2...Variation rhythm pattern designation signal generation circuit,
3...Filfin rhythm signal source circuit, 4...Demodulator, 5
... Pattern generation circuit, 6 ... Sequential pulse generation circuit, 9 ... Sound source circuit, 2.4 ...
...Step-up switch, 25...Step-down switch, 31, 32...Pulse oscillation source. Figure 2: Ship

Claims (1)

[Claims] 1. A basic rhythm pattern designation signal generation circuit that generates a signal for selecting a desired pattern from among a plurality of basic rhythm patterns, and a variation rhythm that generates a signal for selecting a plurality of variation patterns for each basic rhythm pattern. a pattern designation signal generation circuit; a rhythm pattern generation circuit that stores all of the patterns; a sequential pulse generation circuit that generates sequential pulses for sequentially reading out the rhythm patterns of the rhythm pattern generation circuit; a sound source circuit that outputs a compliant musical instrument sound;
In the automatic rhythm accompaniment device, the variation rhythm pattern designation signal generation circuit is provided with a variation rhythm pattern change switch, and further includes a signal source for obtaining a rhythm other than the above rhythm for short time generation. The automatic rhythm accompaniment device is characterized in that when the variation rhythm pattern changing switch is operated, a signal is generated from the other rhythm signal source and the signal is applied to the sound source circuit.