A
- 1-2-3 design (8)
- 12-tone system (3)
- 1920s (6)
- 1930s (6)
- 20th century music (6)
- Abbado, Claudio (3)
- Abilities of young people (2)
- Abstract ballet (3)
- The Accordion (3)
- Acoustics (4)
- Adagio (3)
- Aeolian mode (5)
- African-American music (2)
- Africa (4)
- Alberti bass (5)
- Aleatory music (2)
- Almer: "Along Comes Mary" (5)
- Alston, Fred (3)
- Alumni (2)
- Amerca's attitude towards music (3)
- American composers (5)
- American music (25)
- Art music (3)
- Artificial sound (5)
- Assistant conductors (2)
- Astrology (3)
- Atonal music (6)
- Atonality (10)
- Augmentation (4)
- Austin, Larry (3)
- Austin: Improvisations for Orchestra and Jazz Soloists (3)
- Austro-Germanic heritage (2)
- Avant-garde (2)