Plu In, Play! Each piece is designed to be played with the backing tracks on the accompanying CD. For each piece there are two versions on the CD: one with the melody to help you learn the tune, and then one without the melody so you become the lead! There is a two-bar click-in on each track, apart from those that start with a bars rest for the performer. Simply count 1...2...1,2,3,4 and then youre in.