Ensembles
- A:N:S Chorus
- A4 Brass Quartet
- A4E Ensemble
- AAA---AAA
- Aachener Bachverein
- Aachener Domchor
- Aage Juhl-Thomsens Orchestra
- Aalborg Symfoniorkester
- Aalto Kinderchor
- Aarhus Cathedral Choir
- Aarhus Chamber Choir
- Aarhus Jazz Orchestra
- Aarhus Music Students Chamber Choir
- Aarhus Symfoniorkester
- Aarhus Symphony Orchestra Choir
- Aarhus Universitetskor
- Aaron Zigman Ensemble
- ABBA
- Abbaye de Saint Benôit-Du-Lac Choir
- Abbey Road Ensemble
- ABC Concert Orchestra
- Abchordis Ensemble
- Abdelkrim Rais Andalusian Orchestra of Fès
- Abegg Trio
- Abel-Steinberg-Winant Trio
- Abilene
- Abramski Trio
- Absolut Trio
- Absolute Ensemble
- Absolwent aus Cieszyn
- AB-squared
- AC Academy Scholars
- AC Academy Warwick
- Acacia Quartet
- Academia Allegro Vivo
- Academia Chigiana Siena
- Academia de li Musici
- Academia de Música Contemporánea de la Joven Orquesta Nacional de España
- Academia de Música de Santa Cecília Children's Choir, Lisbon
- Academia Dià.Pason
- Academia Jacobus Stainer
- Academia Montis Regalis
- Academia Montis Regalis Choir
- Academia Musica Choir
- Academia Sancta Katharina
- Academia Symphonica of Udine
- Academic Symphony Orchestra of Moscow State Philharmonic Society
- Academica String Quartet
- Académie de musique de rue Tonton à faim
- Académie Royale de Musique de Paris