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. 13, 1987
Filed:
Aug. 22, 1986
Shigenori Oguri, Hamamatsu, JP;
Akira Iizuka, Hamamatsu, JP;
Nippon Gakki Seizo Kabushiki Kaisha, Hamamatsu, JP;
Abstract
An automatic musical accompaniment playing system for use in an electronic musical instrument with an auto rhythm system changes a tone color of accompaniment tones when the state of operation of the auto rhythm system is changed. The automatic accompaniment playing system comprises a tempo clock generator for generating tempo clock pulses having a frequency proportional to a tempo of a rhythm to be generated and a register for storing a flag indicative of a state of operation of the auto rhythm system. The tempo clock pulses are counted by a tempo counter when the auto rhythm system is in operation, and the state of operation of the auto rhythm system is detected in accordance with the state of the flag. A memory stores two groups of tone color data, one of which is selected when the auto rhythm system is in operation, and the other of which is selected when the auto rhythm system is not in operation. One of the tone color data in the selected group is read from the memory in accordance with an output of a tone color selection switch. A tone signal generating circuit generates tones of a chord inputted through a keyboard in accordance with a count value of the tempo counter in a tone color designated by the read tone color data.