- Aphroasia Technubian -- Apocalyptica featuring Adam Gontier of Three Days Grace
- Apocalyptica featuring Tomoyasu Hotei -- Apollo Up!
- Apollo Voices -- Apostle Urban Brown
- Apostles -- Appetite Apes
- Appetizer -- Appogee
- Appointed by God -- April Harris
- April Hayley -- A.P.T.
- Apt.14 -- aqualash
- Aqualeo -- Aqueous
- Aqueous Reflections -- Ara Dinkjian
- Ara Gevorgian -- Arachnoid
- Araciel -- Aram Saroyan
- Aram Shelton -- Arawak Mountain Singers
- Arawi -- Arc Storm
- ARC Studio Band -- Arcangelo Corelli
- Arcangelo Manigrasso -- Archers of Loaf
- Archery -- Archie Stewart
- Archie Sturgill -- Arcsin
- ARCTIC -- Arditti String Quartet
- Ardjoen Autaar -- Arena
- Arena -- Argentina Santos
- Argentina Tango Orchestra -- Ari Benjamin
- Ari Benjamin Meyers -- Aria Novos
- Aria Palea -- Arícia Mess