US PATENT SUBCLASS 984 / 397
.~.~.~.~ Using Fourier coefficients {G10H 7/10B}


Current as of: June, 1999
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984 /   HD   MUSICAL INSTRUMENTS

300  DD  ELECTRONIC MUSICAL INSTRUMENTS {structural combinations of microphones, pick-ups, or amplifiers with musical instruments subclasses 1+, 50+, and 100+; Instruments in which each note is generated by a different individually-actuated mechanical resonating structure and is amplified electrically subclasses 50+; Instruments in which each note is produced by a different electrically-vibrated sounding element subclasses 100+; Electronic circuits in general H03. {G10H} {4}
388  DD  .~ Instruments in which the tones are synthesized from a data store, e.g., computer organs,etc. {synthesis of acoustic waves not specific to musical instruments G10K 15/02, G10L} {G10H 7/00} {4}
395  DD  .~.~ By calculating functions or polynomial approximations to evaluate amplitudes at sucessive sample points of a tone waveform {G10H 7/08} {2}
396  DD  .~.~.~ Using coefficients or parameters stored in a memory, e.g., Fourier coefficients, etc. {subclass 398 takes precedence} {G10H 7/10} {1}
397.~.~.~.~ Using Fourier coefficients {G10H 7/10B}