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:
Feb. 15, 1994
Filed:
Aug. 27, 1992
Masahiko Hasebe, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
An electronic musical instrument provides plural channels from which manual-performance sounds and/or automatic-performance sounds (e.g., automatic-accompaniment sounds) are generated. Herein, the manual-performance sound is designated by a performance manually made by a performer, while the automatic-performance sound is designated on the basis of automatic-performance information which is stored in a memory or the like in advance. Normally, a new musical tone is assigned to an unoccupied channel which is not occupied with a tone generation, so that the new musical tone will be generated from the unoccupied channel. However, under a full-channel condition where all of the channels are occupied with the tone generation, a new manual-performance sound is assigned to one of the channels whose envelope value is the smallest. If a new automatic-performance sound is designated under the full-channel condition, this new automatic-performance sound is assigned to one of the channels occupied with the tone generation of the automatic-performance sounds which receives a key-off command and of which envelope value is the smallest. If it fails to detect such channel, the new automatic-performance sound is assigned to one of the channels occupied with the tone generation of the manual-performance sounds which receives a key-off command but sustains to generate the manual-performance sound. Thus, each of the manual-performance sounds and automatic-performance sounds can be smoothly and automatically assigned to an appropriate one of the channels.