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:
Mar. 29, 1994
Filed:
Feb. 14, 1991
Iwao Higashi, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A musical tone waveform signal forming apparatus comprises a waveform signal transmission section, a musical tone control signal input section and a pitch control section. The waveform signal transmission section comprises a plurality of signal transmission units which are connected in cascade one by one and each of which comprises first and second signal lines respectively serving as forward and backward paths of a waveform signal and a node portion for feeding back an output from the first signal line to an input side of the second signal line. At least one of the first and second signal lines serves as a signal delay line. The musical tone control signal input section receives the waveform signal from the waveform signal transmission section and a musical tone control signal for controlling musical tone parameters of a musical tone to be generated to change the waveform signal in accordance with the musical tone control signal and output the changed waveform signal to the waveform signal transmission section. The pitch control section changes delay times of the signal delay lines in accordance with a pitch signal, one of the tone control signal, for controlling a tone pitch of the musical tone to be generated.