A.
- Accents, [92].
- Adagio, [189].
- Æolian mode, [83].
- Æschylus, [70], [76].
- Alberti bass, [197].
- Allemande, [182], [189], [195].
- Amati, [138].
- Ambros, [205].
- Ambrose, [98], [99], [102], [104].
- Amiot, [50], [57], [61], [263].
- Anapæst, [75].
- Andaman Islanders, [3], [5], [6].
- Animals, [13].
- Arabian, [152], [158].
- Architecture, [192], [225].
- Arion, [76].
- Aristides, [74], [84].
- Aristophanes, [91], [92].
- Aristotle, [49].
- Aristoxenus, [73], [81].
- Assyrian, [48].
- Auber, [216], [217], [219].