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. 28, 1991
Filed:
Apr. 03, 1989
Applicant:
Inventors:
Hideo Yamaya, Akishima, JP;
Akio Iba, Tokorozawa, JP;
Assignee:
Casio Computer Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10H / ; G10H / ; G10H / ;
U.S. Cl.
CPC ...
84622 ; 84736 ; 84DI / ;
Abstract
Waveform data is read out from a memory which stores the waveform data at a rate corresponding to a designated pitch. The readout data is supplied to digital filters, and two or more different filtering operations are executed in the digital filters. Two or more waveform data obtained as a filtering result are synthesized at a rate determined in response to a breath input signal output from a breath sensor, and the synthesized data is output as a musical tone waveform signal. The filter performs the filtering operation while a cut-off frequency is changed in response to the breath input signal.