This set is designed for ALL rhythm section players and teachers. Listen as you would any jazz recording as the melody is played in and out, solo, comp., and trading "4s". This is a tremendous tool for teachers...it allows isolation and careful study of each instrument's role with definitive chapters in the booklet. This set includes piano and guitar voicings, transcribed bass lines, and outstanding drum information. This is Jamey's first play along where the drummer can be turned off and students can trade 4s and 8s with the pros (Volume 30B only). Volume 30A is for keyboardists and guitarists. Volume 30B is for bassists and drummers.