For all musicians regardless of ability! If you use this set with Volume 1, you will have a solid foundation to meet any new challenge. This set covers major, minor (dorian, harmonic and melodic), dominant 7th, half-diminished, lydian and sus. 4. It also has a very slow blues in F and one in Bb. 31 different tracks with a lot of variety, including root movements that are 1,2,and 4 bars each and move up/down chromatically, in tritones, around the circle of fourths, and randomly. CD tracks have been recently extended to allow more practice time without interruption.