Grainger Singers, The [IA][Direct] -
- a chamber group whose repertoire ranges from madrigals to 20th century classical. Named for pianist and composer Percy Aldrige Grainger.
Pacific Empire Chorus [IA][Direct] -
A 110-woman performance and competition chorus singing four-part, a cappella harmony in jazz, pop, rock and barbershop styles.
Sonoma County Bach Society [IA][Direct] -
Specializes in the performance of Baroque, Rennaissance, and Classical music in an authentic performance style using baroque instrumentalists.