Automatic performance apparatus with operated rotation means for

Details Automatic performance apparatus with operated rotation means for Automatic performance apparatus with operated rotation means for

1992-12-01

1994-09-27

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84612, 84644, 84652, G10H 700

Patent

active

053508823

ABSTRACT:
An automatic performance apparatus which easily changes the tempo and direction of automatic performance of a musical instrument, for example, to a rhythm of a rap music such that a disc jockey operates a scratch disc. Clock frequency SQCK of sequence counter 202 is changed in accordance with the speed and quantity of rotation of disc 102 and ball 1101 rotated with user's fingers, so that the timing of reading event data and event time data out of sequencer memory 206 is controlled and the tempo of the automatic performance is changed. When the user changes the rotational direction of disc 102, counter 202 performs a decrementing operation in accordance with a rotational direction signal output from rotational direction detector 110, thereby giving a reverse automatic performance. At the start of the automatic performance, disc 102 starts to rotate at a predetermined rotational speed in accordance with tempo data read out of sequencer memory 206 to thereby determine the initial tempo of the automatic performance (FIG. 1).

REFERENCES:
patent: 4813327 (1989-03-01), Abe
patent: 5241125 (1993-08-01), Miyamoto
patent: 5245663 (1993-09-01), Green
patent: 5266736 (1993-11-01), Saito
patent: 5278348 (1994-01-01), Eitaki et al.
patent: 5286909 (1994-02-01), Shibukawa

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