Bass Clef Edition-Bass Clef Edition. Exercises and Etudes for the Jazz Instrumentalist is a collection of original pieces by master trombonist and composer J.J. Johnson. Designed as study material and playable by any Bass Clef instrument these pieces (the harmonies of which are based on well-known standards) run the gamut of the jazz experience featuring common and uncommon time signatures and keys and styles from ballads to funk. They are progressively graded so that both beginners and professionals will be challenged by the demands of this wonderful music. Published in both treble and bass clef editions this book also includes text to guide the player as well as a biographyof Johnson.