US PATENT SUBCLASS 84 / 622
.~.~.~.~ Tone synthesis or timbre control

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
601  DF  .~.~ Data storage {6}
602  DF  .~.~.~ Digital memory circuit (e.g., RAM, ROM, etc.) {9}
622.~.~.~.~ Tone synthesis or timbre control {3}
623  DF  .~.~.~.~.~> Time varying or dynamic fourier components
624  DF  .~.~.~.~.~> Modulation
625  DF  .~.~.~.~.~> Mixing

DEFINITION

Classification: 84/622

Tone synthesis or timbre control:

(under subclass 602) Subject matter wherein the harmonic content of a note is controlled or modified.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

106+, for waveform or waveshape determinative systems.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

100+, for miscellaneous converting, shaping, or generating.

333, Wave Transmission Lines and Networks,

28, for audio tone controls; subclasses 167+ for lumped parameter filters, per se. 381, Electrical Audio Signal Processing Systems and Devices,

101, 103 for automatic tone control or equalization of an audio signal; subclass 118 for signal processing of musical instruments, per se.

708, Electrical Computers: Arithmetic Processing and Calculating,

300+, for digital filtering by a calculating computer.