All parts:
Chorus only (first three lines):
Soprano I chorus only (top line):
Soprano I chorus karaoke (all but Soprano I chorus):
Soprano II chorus only (second line):
Soprano II chorus karaoke (all but Soprano II chorus):
Alto chorus only (third line):
Alto chorus karaoke (all but Alto chorus):
Soprano I echo karaoke (all but Soprano I echo):
Soprano II echo karaoke (all but Soprano II echo):
Alto echo karaoke (all but Alto echo):