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:
Jun. 20, 1995
Filed:
Sep. 10, 1992
Hiroyuki Toda, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A musical tone control waveform signal generating apparatus is provided in order to generate a musical tone control waveform signal by which a musical tone generated from an electronic musical instrument is to be controlled. The musical tone control waveform signal is varied in its envelop level by each of time-division sections to be passed over a lapse of time. For instance, when a key-depression event is occurred, this musical tone control waveform signal of each time-division section is formed by carrying out a computation by use of parameters which are preset with respect to each section. Preferably, the parameters concern with the variation rate and target level of the musical tone control waveform signal to be formed by each section.