Track 1: Alto muted - Douglas E. Wagner
Track 2: Alto predominant - Douglas E. Wagner
Track 3: Balanced Voices - Douglas E. Wagner
Track 4: Baritone muted - Douglas E. Wagner
Track 5: Baritone predominant - Douglas E. Wagner
Track 6: Soprano muted - Douglas E. Wagner
Track 7: Soprano predominant - Douglas E. Wagner
