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:
May. 02, 1995
Filed:
Dec. 13, 1993
Tsutomu Saito, Shizuoka, JP;
Kabushiki Kaisha Kawai Gakki Seisakusho, Hamamatsu, JP;
Abstract
Disclosed is a tone generating apparatus which is provided with a timbre select switch to specify a timbre and a scan circuit for generating key codes corresponding to keys. Pitch control values corresponding to the timbres and key codes are stored in the form of a pitch control table in a ROM. When a predetermined key is depressed, a pitch control value specified by the key code associated with that key and the timbre selected by the timbre select switch is read out from the pitch control table in the ROM, and a tone frequency is determined by the pitch control value and key code. Tone generation is controlled based on the tone frequency. A pitch control value read out from the pitch control table in the ROM is given a predetermined offset to produce a musical tone having vibrato. Further, a pitch control value read out from the pitch control table in the ROM is multiplied by a value specified by an operation panel to alter the degree of adding the pitch.