Intermediate/advanced level. If you have been working on playing scales, chords, and harmony in general, this set is the next step towards getting your ears and fingers coordinated. This set is a continuation of Volume 3, but in much more depth. Set contains 5 Turnaround Tracks, 6 Cycle Tracks, Coltrane Blues, Some of The Things I Am (an exercise in substitute II/V7's), Joy Stick, 6 II/V7 Tracks, Coltrane Changes in All 12 Keys, Bb Rhythm Changes (slow tempo), and Guess What Key I'm In. Twenty-three tracks in all and almost all go through all 12 keys!! Rhythm section is Jamey Aebersold, piano; John Clayton, bass; Mike Hyman, drums; and others. 5 Turnaround Tracks 6 II/V7 Tracks 6 Cycle Tracks Coltrane Changes in All 12 Keys Coltrane Blues Guess What Key I'm In Bb Rhythm Changes Some of The Things I Am