US PATENT SUBCLASS 84 / 681
.~.~.~.~ Fundamental tone detection or extraction

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
671  DF  .~.~ Electric analog oscillators {9}
678  DF  .~.~.~ Selecting circuits {9}
681.~.~.~.~ Fundamental tone detection or extraction

DEFINITION

Classification: 84/681

Fundamental tone detection or extraction:

(under subclass 678) Subject matter wherein the fundamental or pitch is detected and used to activate or modify a musical system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

616, for fundamental tone detection or extraction with digital storage.

654, for fundamental tone detection or extraction with digital combinational circuit.