Practice with Bach - Vol.5 Ralph Sauers landmark new work, Practice With Bach for the Tuba, Volume V, will challenge your technique and musicality with demanding new études. Based on the keyboard works of J. S. Bach, each of the Five Volumes is available in five different versions--Alto Trombone, Tenor Trombone, Bass Trombone, Euphonium, and Tuba. Each version is customized for the individual instrument (choice of key, range, ornaments, etc.). Volume Five contains Twenty-four études based upon the Six English Suites (BWV 806-811).