Track 1: Accompaniment Only - Robert Shaw LW1
Track 2: Alto 1 Muted - Robert Shaw LW1
Track 3: Alto 1 Predominant - Robert Shaw LW1
Track 4: Alto 2 Muted - Robert Shaw LW1
Track 5: Alto 2 Predominant - Robert Shaw LW1
Track 6: Balanced Voices - Robert Shaw LW1
