Duets/Trios-These flexible pieces can be played as either Duets or Trios.PART 1: Bb Soprano and/or Eb Alto Saxophone PART 2:Eb Alto and/or Bb Tenor Saxophone PART 3: (optional) Eb Baritone Saxophone and/or Bassoon.From the Golden Sonata (Sonata No. 2 in F).