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:
Oct. 27, 1981
Filed:
Sep. 13, 1979
Masanobu Chibana, Hamamatsu, JP;
Abstract
In an electronic musical instrument, two or more pulse signals different in phase are generated each having a frequency corresponding to the tonal pitch of an operated key, an envelope waveshape is read out upon every key operation, sampling is executed on the envelope waveshape by means of these pulse signals, and polarities of sample values are converted in reference to these pulse signals for generation of a corresponding musical tone waveshape. Minimized use of arithmetic circuits such as adders and multipliers greatly reduces production cost whilst assuring generation of a wide variety of colorful, noise-free musical tones. By addition of a slope conversion circuit, abrupt shift in the generated musical tone waveshapes can well be disappeared.