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:
Sep. 28, 1982
Filed:
May. 09, 1980
Shigeru Yamada, Hamamatsu, JP;
Kiyoshi Ichikawa, Hamakita, JP;
Nippon Gakki Seizo Kabushiki Kaisha, Tokyo, JP;
Abstract
In an electronic musical instrument of a digital processing type, an operation of a key causes the generation of a digital value corresponding to the operated key and a tone having a frequency determined by that digital value is produced. The instrument comprises a key assigner which assigns the operated keys from among a large number of keys to a small number of channels, which small number is a number of maximum available tones to be produced simultaneously. The instrument further comprises a modifying value generator for generating modifying values for the respective channels, the value being a first value upon key operation and subsequently varying to a second value to provide an attack pitch fluctuation effect. The key assigner and the modifying value generator are of a time division multiplexing type with the channels being defined by the corresponding time slots.