Ars Nova - 24-voice auditioned ensemble in suburban Detroit. Concert schedule, background, and membership information. - http://arsnova-mi.org/
Holland Chorale - Ensemble established in 1946 that strives for community improvement and civic engagement through their performances. Concert schedule, mission statement, and group history. - http://www.hollandchorale.org/
Detroit Concert Choir - International award-winning group. Information about the organization, season and singers, plus a list of available CD/Tape recordings. - http://www.detroitconcertchoir.org/
Vanguard Voices - 70+ voice ensemble from Dearborn. Performance schedule and contact information. - http://www.vanguardvoices.org/