The 24 etudes in this collection were written to serve three purposes: technical development, musical enjoyment and jazz analysis. The intention was to provide exercises for trombonists in basic jazz technique. All of the etudes are "difficult" in one way or another, and learning to play them well will develop speed, flexibility and a sense of jazz phrasing. Eash etude was designed to be enjoyable as a musical entity. Students of jazz improv might want to analyze the musical lines and their relationship to the harmonic base as an aid to creating their own jazz solos. The CD includes each etude recorded twice—once with trombone & rhythm section, and one with the rhythm section only.