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. 13, 1997
Filed:
Aug. 14, 1996
Tatsuya Inaba, Hamamatsu, JP;
Kabushiki Kaisha Kawai Gakki Seisakusho, Shizuoka-ken, JP;
Abstract
In a piano which is enabled to provide performance using electronic sound source as well as normal piano play, the proposed piano is such a piano where there is no difference of balance between the normal piano play and the play using electronic sound source. When key is moved in an electronic sound source mode, CPU detects a number n of the key (S110), detects a time lag .DELTA. T between the timings at which blockage is caused between light emitting elements and light receiving elements of both key sensors (S120), and calculates a velocity V according to the time lag .DELTA. T (S130). Then, performance data is prepared according to these key depression information, at the performance data preparation routine (S140), and a delay time Td corresponding to the velocity V is determined by using a delay time determination table (S150). Subsequently, it is determined whether the delay time Td has elapsed (S160). When it has elapsed, the performance data is outputted to the electronic sound source (S170). As a result, sound is created, with the delay time Td, according to the key depression intensity as an interval after the key depression.