Automatic rhythm generating method and apparatus in electronic m

Details Automatic rhythm generating method and apparatus in electronic m Automatic rhythm generating method and apparatus in electronic m

1978-12-27

1980-08-19

Witkowski, S. J.

Music

Instruments

84DIG12, G10H 140

Patent

active

042178061

ABSTRACT:
A read only memory is provided, which has a plurality of storing regions allotted for a plurality of kinds of rhythm patterns, each region having a plurality of addresses for storing, in an address sequence, a rhythm pattern of a shortest rhythm pattern unit represented by a combination of information units in the form of logic "ones" and logic "zeros", the logic "one"; representing a note being generated and the logic zero representing a note being not generated, whereby the notes are represented in binary form, whereby the required number of information units is reduced compared to the prior art. Each address in the memory has a plurality of bit positions allotted to a plurality of kinds of musical instruments, whereby a plurality of kinds of rhythm patterns are stored for a plurality of kinds of musical instruments. A matrix is provided for presetting the number of steps in terms of clock signals for each kind of rhythm pattern required for reading the stored rhythm pattern in a repetitive manner for generating a desired rhythm as a repetition of the shortest rhythm pattern unit. An address counter is coupled to the read only memory and responsive to the clock signals for addressing the same. An address control is responsive to the number of clock signals preset by the matrix for controlling the address counter for skipping the addresses each time the preset number of clock signals are provided. As a result, the number of addresses used in the read only memory is reduced. The outputs of the read only memory read in a bit parallel fashion from each of the addresses as addressed are applied to tone generators for generation of a mixed rhythm signal.

REFERENCES:
patent: 3840691 (1974-10-01), Okamoto
patent: 3958483 (1976-05-01), Borrevik et al.
patent: 4058043 (1977-11-01), Shibahara
patent: 4135423 (1979-01-01), Gross
patent: 4163407 (1979-08-01), Solender

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