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:
Jul. 30, 1991
Filed:
Feb. 19, 1988
Applicant:
Inventor:
Mitsumi Kato, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G / ;
U.S. Cl.
CPC ...
381 62 ; 84629 ;
Abstract
A modulation effect device is implemented by utilizing a fact that a phase or frequency of an output signal from a digital filter can be varied by varying a filter-coefficient according to a lapse of time. A musical tone signal inputted into the digital filter is phase-or frequency-modulated in accordance with the variation of the filter coefficient, thereby imparting such modulation effect as vibrato, chorus or ensemble (symphonic chorus) to the musical tone signal.