Music – Instruments – Electrical musical tone generation
Patent
1998-10-19
1999-08-31
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84609, G10H 126, G10H 700
Patent
active
059456191
ABSTRACT:
An electronic musical apparatus utilizes a central processing unit for working various modules to generate music tones, while controlling a work load of the central processing unit. The apparatus is composed of a player module, a driver module, a sound source module, and a timing module. The player module provides a sequence of event data indicating an event of a music tone and timing data indicating an occurrence time of the event. The driver module is intermittently triggered to process the event data to create control parameters reserved for use in generation of the music tone corresponding to the event data. The sound source module is routinely triggered to load therein the reserved control parameters for generating the music tone according to the timing data. The timing module issues a synchronous trigger signal effective to routinely trigger the sound source module, and issues an asynchronous trigger signal independently of the timing data for intermittently triggering the driver module so as to avoid concentration of the work load of the central processing unit.
REFERENCES:
patent: 5596159 (1997-01-01), O'Connell
Hal Chamberlin, "Musical Applications of Microprocessors", 2.sup.nd Ed., Hayden Books, 1987, pp. 639-774.
Witkowski Stanley J.
Yamaha Corporation
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