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:
Apr. 19, 2016
Filed:
Mar. 17, 2011
Masaru Aiso, Hamamatsu-Shi, JP;
Masaru Aiso, Hamamatsu-Shi, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
It is possible to enable automatic on/off switching of a pad and to prevent frequent occurrence of on/off switching of a pad even when a user carries out fine manipulation. A level adjustment device includes a pad which attenuates a signal by a predetermined level, an amplifier which is provided at the back of the pad to adjust the level of the signal with a variable amplification rate or attenuation rate, and a level adjustment unit which, when the pad is off, uses only the amplifier and, when the pad is on, uses the amplifier and the pad to adjust the level of the acoustic signal. The setting of a level adjustment value by the level adjustment unit is received, when the level adjustment value reaches a predetermined switching point Tsw, the on/off of the pad is switched, and when an instruction is issued to start a performance mode, the value of the switching point Tsw is changed so as to be away from the level adjustment value at the point of time of the instruction.