Each volume has parts for C, Bb, Eb, and bass clef instruments and includes a sample jazz solo written out for you to listen, play, and practice. The included CD has a demo and play-along track for each tune. The demo track , featuring a pro rhythm section and horn player, is a learning tool for the melodic concept, overall jazz style and the sample jazz solo. The play-along track allows a soloist or group to learn and perform with the rhythm section. Specific improvisation tips and suggestions.