| 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} |
| 301 | DD | .~ Details of electrophonic musical instruments {keyboards applicable also to other musical instruments subclasses 1+ and 50+} {G10H 1/00} {9} |
| 309 | DD | .~.~ Means for controlling the tone frequencies, e.g., attack, decay, etc.; Means for producing special musical effects, e.g., vibrato, glissado {for instruments using voltage controlled oscillators and amplifiers or voltage controlled oscillations and filters, etc., see subclass 381} {G10H 1/02} {2} |
| 324 | DD | .~.~.~ Circuits for establishing the harmonic content of tones; other arrangements for changing the tone color {G10H 1/06} {4} |
| 325 | | .~.~.~.~ By combining tones {subclasses 325 and 326 take precedence} {chord subclass 347; Analysis or synthesis of sound waves, per se, G10L} {G10H 1/08} {1} |
| 326 | DD | .~.~.~.~.~> For obtaining chorus, celeste or ensemble effects {continuous modulation subclass 311} {G10H 1/10} |