CDs with fully orchestrated accompaniment tracks are the hallmark of these instrumental collections. Each book contains a carefully edited part that is appropriate for the Level 2-3 instrumentalist. The CDs include a demo track with a live instrumental performance, followed by a play-along track. The woodwinds and brass books are compatible with each other and can be played together or as solos; the strings books are compatible with each other, but not with the woodwinds and brass instrument editions.