If you’re ready for further challenges, try this collection of slightly more difficult tunes also in all 12 keys. Each tune begins with one chorus in the original key, and then moves through the other eleven keys. The tempos are moderate, but the real work-out comes when you start going through the various 'un-common' keys. This challenging play-a-long is for anyone ready to put themselves 'through the paces' – the right way! Rhythm section on the CD is Mark Levine-piano; Lynn Seaton/Todd Coolman-bass; Barry Ries-drums.