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. 06, 1987
Filed:
May. 17, 1985
Applicant:
Inventor:
Tadao Sakai, Hamamatsu, JP;
Assignee:
Roland Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10H / ; G10H / ; G06F / ; G04F / ;
U.S. Cl.
CPC ...
84-11 ; 84-127 ; 364569 ; 364722 ;
Abstract
A key-touch value control device for an electronically operated musical instrument including a series of keys, wherein the state of each of the keys is detected to produce a succession of key-state signals each indicative of one of the key-on state, key-off state and key-fly state of the key. In response to each of the key-state signals, a key-touch value signal is produced which is variable with the velocity at which the key is being depressed toward the key-on state and which is representative of the volume of the sound to be produced after the key has reached the key-on state.