US PATENT SUBCLASS 84 / 602
.~.~.~ Digital memory circuit (e.g., RAM, ROM, etc.)

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.~.~.~ Digital memory circuit (e.g., RAM, ROM, etc.) {9}
603  DF  .~.~.~.~> Sampling (e.g., with A/D conversion)
604  DF  .~.~.~.~> Waveform memory {3}
608  DF  .~.~.~.~> Fourier coefficient memory
609  DF  .~.~.~.~> Note sequence {1}
615  DF  .~.~.~.~> Selecting circuits {5}
621  DF  .~.~.~.~> Noise reduction (e.g., error prevention)
622  DF  .~.~.~.~> Tone synthesis or timbre control {3}
626  DF  .~.~.~.~> Expression or special effects (e.g., force or velocity responsive, etc.) {7}
634  DF  .~.~.~.~> Accompaniment {3}

DEFINITION

Classification: 84/602

Digital memory circuit (e.g., RAM, ROM, etc.):

(under subclass 601) Subject matter wherein the tone characteristic information is stored by digital memory circuit in a discrete format (e.g., RAM, ROM, etc.) to

produce musical tone.

(1) Note. This subclass does not provide for generating musical tone based on digital combinational circuit (See this class subclass 647 for digital combinational circuit).

SEE OR SEARCH CLASS

360, Dynamic Magnetic Information Storage and Retrieval,

32, for prior analog to digital conversion before storage; subclass 39 for digital storage; subclasses 55+ for magnetic recording and retrieval; subclasses 131+ for storage medium, per se.

365, Static Information Storage and Retrieval, appropriate subclasses, for specific memory systems, per se.

711, Electrical Computers and Digital Processing Systems: Memory, 100+, for generic storage accessing and control in digital data processing systems.