| 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} |
| 609 | DF | .~.~.~.~ Note sequence {1} |
| 610 | | .~.~.~.~.~ Accompaniment {3} |
| 611 | DF | .~.~.~.~.~.~> Rhythm {1} |
| 613 | DF | .~.~.~.~.~.~> Chords |
| 614 | DF | .~.~.~.~.~.~> Reiteration |