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:
Jul. 23, 1992
Yamaha Corporation, , JP;
Abstract
An electronic musical instrument: is provided to perform an active control on the pitch of the musical tone to be generated, thereby simulating the pitch-rising phenomenon to be occurred in the performance of a non-electronic musical instrument such as a wind instrument, percussion instrument and stringed instrument. In case of the simulation of the wind instrument, this electronic musical instrument is mainly configured by an excitation-vibration circuit and a tube simulation circuit which are connected together by means of a junction. The tube simulation circuit is configured by a closed-loop circuit in which plural delay circuits and junction circuits are connected together in cascade-connection manner. Herein, the delay circuits simulate the propagation delay of the air-pressure wave to be transmitted through the tube of the wind instrument, while the junction circuits simulate the scattering manner of the air-pressure wave at the points at which the diameter of the tube is changed. The number of the delay stages which are required to simulate the musical sound is controlled to be changed in a lapse of time.