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:
Jan. 05, 2010
Filed:
Oct. 17, 2007
Gen Izumisawa, Hamamatsu, JP;
Gen Izumisawa, Hamamatsu, JP;
Kabushiki Kaisha Kawai Gakki Seisakusho, Shizuoka, JP;
Abstract
A music sound generator imitates released key string vibration sounds (RKSV) and cabinet resonances of an acoustic piano. When a key is pressed, waveform is readout from a normal music sound waveform memory. The normal sound waveform is inputted into a filter, and inputted into a filterthrough a band-pass filter. Output waveform of a cabinet resonance waveform memoryis inputted into a filterwhen the key is pressed. Outputs of the filters are synthesized by an adderthrough multipliersthrough. When the key is pressed, a cut-off frequency of the filteris sufficiently low and RKSV is not generated. If the damper is not on when key-releasing, the cut-off frequency is returned to normal and RKSV is generated. A level controllerattenuates the RKSV and the cabinet resonance for a longer time than the normal music sound.