Acoustic control system for electronic musical instrument

Details Acoustic control system for electronic musical instrument Acoustic control system for electronic musical instrument

2005-07-12

2005-07-12

Fletcher, Marlon T. (Department: 2837)

Music

Instruments

Electrical musical tone generation

C084S601000, C084SDIG001, C381S118000

Reexamination Certificate

active

06916980

ABSTRACT:
An acoustic control system for an electronic musical instrument, which can obtain optimal acoustic characteristics irrespective of whether or not a low range speaker is attached to a body thereof. A piano body has high range and mid range speakers. A low range speaker is removable from the body. A stand-excluding switch designates a first speaker-use mode for using the high range and mid range speakers alone, and a stand-including switch designates a both speaker-use mode for using both the high range and mid range speakers and the low range speaker. A ROM stores stand-excluding and stand-including factors for setting acoustic characteristics in the two modes, respectively. A CPU reads one of the factors, which corresponds to the mode designated by the stand-excluding or stand-including switch. A tone generator circuit generates a musical tone signal to be reproduced in one of the modes, based on the read factor.

REFERENCES:
patent: 3612741 (1971-10-01), Marshall
patent: 4058045 (1977-11-01), Jennings et al.
patent: 4203340 (1980-05-01), Ostrom
patent: 4329902 (1982-05-01), Love
patent: 6399870 (2002-06-01), Azima et al.
patent: 6605765 (2003-08-01), Johnson
patent: 6696632 (2004-02-01), Minakuchi et al.

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