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Abakustiker
Abendsberger Topkids
Abendsterne der junge Chor
A Cappella Chor Donaufeld
Academical Orchestra and Choir
Academic Male Choir of Tallinn Technical University
 Adelaide Male Voice Choir
Agrupacion Corale
Alexandria Harmonizers
A Komlói Pedagógus Kamarakórus  aus Ungarn
Alsfelder Shanty Chor "Blaue Jungs"
Alsfelder Doppelquartett Ensemble Musica
Alsfelder Ratssänger
Altonaer Singakademie e.V.
Alsfelder Singkreis
Alsfelder Vokalensemble
  Altenburger Gospelchor "Go(o)d News"
All Saints, Leighton Buzzard
 Alles im Takt
"Amanda"
Amberger Chorgemeinschaft
Amarillo Boy Choir (North Carolina Boy Choir)
 Anacrouse Choir
Ars Femina Girls aus Brasilien
Amsterdams Synagogaal Koor
Ave Sol Chamber Choir
Angel Voices
Atlanta Sacred Chorale