Accent on Ensembles is an exciting book of duets, trios and quartets for flexible instrumentation that correlates with Accent on Achievement , Book 1. Use these ensembles to develop confidence in young players and as a valuable resource for music during contest season. Since the instrumentation is flexible, any combination of instruments can play together. Accent on Ensembles , Book 2 is an exciting book of duets, trios and quartets for flexible instrumentation that correlates with Accent on Achievement , Book 2.