Harmonic Dexterity - 15 Etudes for Bass Trombone/Tuba with play-along CD This book for bass trombonists and tubists contains 15 fun and challenging etudes (with rhythm section accompaniment on CD) from the worlds of jazz, Classical and avant garde genres. Chord symbols are included for playing with colleagues. These etudes, each two-pages in length, are suitable as practice material, and ideal for auditioning and performance on the concert stage.