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:
Oct. 06, 1992
Filed:
Sep. 21, 1989
Koichi Kozuki, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
An automatic key designating apparatus is used for an electronic musical instrument in order to automatically designating a desirable key in response to a chord progression consisting of several chords designated by a performer during a performance. This apparatus provides a chord designating unit (preferably, a keyboard) capable of sequentially designating chords and a memory capable of storing chord information concerning at least a current chord, a preceding chord and a previous chord which were sequentially designated. When it is detected that a predetermined specific chord progression is established in these three chords, key data corresponding to such chord progression is set. Based on this key data, a desirable key is automatically designated. Meanwhile, before setting the key data indicative of the finally determined key, a temporary key can be determined based on the previous and preceding chords. If it is judged that the current chord is on the scale concerning the temporary key, this temporary key is set as the key data. If not, the temporary key is replaced by a new key based on the three chords, which is to be set as the key data.