The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 1993
Filed:
Nov. 09, 1990
Paul H Sharp, Aloha, OR (US);
Rodgers Instrument Corporation, Hillsboro, OR (US);
Abstract
An electronic musical instrument having fewer note generators than notes stores in a sequentially addressable memory different waveform segments corresponding to different sounds. The note generators are time multiplexed by a processor, and use end addresses of current waveform segments to determine whether each current sample to be read is within the desired waveform segment. This limits the ability to noiselessly and rapidly move between segments. It is accommodated by storing a copy of the waveform segments in a readily shifted direction for immediate playout and subsequent shift to the destination waveform segment while reading the copy. This allows for cluster switching and scanning of waveform cycles to control a modulation of the base note, such as attack or tremulant, independently of the base note pitch.