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:
Dec. 14, 1993
Filed:
Mar. 12, 1991
Fumio Rokkaku, Hamamatsu, JP;
Takenori Yamamori, Hamamatsu, JP;
Satoshi Otsuka, Hamamatsu, JP;
Mitsuhiro Umeta, Hamamatsu, JP;
Minoru Fujisawa, Hamamatsu, JP;
Roland Corporation, Osaka, JP;
Abstract
An electronic musical instrument is controlled to receive key operation messages from a keyboard, sequencer or the like so as to control the data in such a manner that the disadvantages of a first-in first-out system and a map system are diminished and the newest data can be obtained rapidly. A reading device sequentially reads musical pitches out from a first memory so that it can be decided whether the values indicated on note-on/off flags in a second memory have the same state as the flags in a third memory. A command is issued to generate and/or truncate (or mute) musical tones based on key-depression (i.e., key state) data for the musical pitches registered in the second memory, if the flags are not identical with each other. On the other hand, the key-depression data are discarded without issuing any command if the flags are the same.