Automatic rhythm playing apparatus

Details Automatic rhythm playing apparatus Automatic rhythm playing apparatus

1975-02-25

1976-08-17

Weldon, Ulysses

Music

Instruments

84 101, G10F 100

Patent

active

039747298

ABSTRACT:
The automatic rhythm producing apparatus according to the invention is capable of providing a clock pulse used for obtaining a basic tempo of a rhythm sound with an irregular pulse period as desired. The apparatus comprises an oscillator for producing a saw-tooth wave signal, a plurality of comparators for comparing this saw-tooth wave signal and a set reference voltage, pulse generation circuits for producing pulses in response to the outputs of the comparators, voltage dividers for supplying the set reference voltages to the comparators, a variable voltage power supply for supplying a variable voltage to the voltage dividers and a pulse generation circuit for producing a pulse when the level of the saw-tooth wave signal drops to zero. The pulse period of a clock pulse obtained by combining the outputs of these pulse generation circuits can be made irregular by suitably varying the variable constant voltage.

REFERENCES:
patent: 3549774 (1970-12-01), Bunger
patent: 3549776 (1970-12-01), Shiga et al.
patent: 3629482 (1971-12-01), Pulfer et al.
patent: 3787601 (1974-01-01), Campbell
patent: 3811003 (1974-05-01), Harris

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