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. 19, 2012
Filed:
Oct. 08, 2009
Tsuyoshi Maruyama, Hamamatsu, JP;
Tsuyoshi Maruyama, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
An electronic keyboard apparatus capable of changing, with a simple construction, a musical tone control characteristic for each pedal manipulation stroke section. A detection value representing a pedal depression depth is converted into an output value according to a table group, and a musical tone parameter is controlled based on the output value. The table group includes default and alternate tables exhibiting a hysteresis such that the output value converted from the same detection value becomes smaller in a reverse pedal stroke than in a forward pedal stoke. In the forward stroke, the default table is changed to the alternate table when the detection value passes a second threshold value provided on a deeper depression depth side than a first threshold value. In the reverse stroke, the alternate table is changed to the default table when the detection value passes the first threshold value.