Random rhythm pattern generator

Details Random rhythm pattern generator Random rhythm pattern generator

1978-11-21

1980-06-24

Rubinson, Gene Z.

Music

Instruments

84 124, 84DIG12, G10H 100

Patent

active

042089387

ABSTRACT:
Random rhythm-pattern generators have been proposed that can select one of several rhythm-patterns (i.e. pulse trains with different repetition cycles) prepared beforehand, change their playing order, and if necessary change the kind of instrumental musical sounds whenever the beating reaches a predetermined number, in order to produce a random accompaniment rhythm sound. The prior art rhythm-pattern generators played the rhythm-patterns only in a fixed order. Therefore, they had the disadvantage of providing a musical performance which was monotonous. According to this invention, this monotony of performance can be avoided because of the following construction: a random pulse generator supplies output pulses representing plural bits of a binary number to a decoder that in turn supplies an output pulse randomly to designate one of the pulse trains with different repetition cycles. Because of this construction, the order of rhythm-patterns to be played and, if necessary, the kind of musical instruments to be played can also be changed at random.
Since the designated pulse train or trains last during the period determined by the output pulse of a frequency divider, or the period corresponding to a desired beat number, no unnatural sound is produced when the random pattern is changed.

REFERENCES:
patent: 3358068 (1967-12-01), Campbell
patent: 3760088 (1973-09-01), Nakada
patent: 3811003 (1974-05-01), Harris
patent: 3958483 (1976-05-01), Borrevik et al.
patent: 3972258 (1976-08-01), Adachi
patent: 3974729 (1976-08-01), Koike
patent: 4163407 (1979-08-01), Solender
Word, Electronic Music Circuit Guidebook, 1975, p. 117.

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