24 Vocalises of Marco Bordogni edited by G. Armand Porret. This book provides exercises in transposition. Each study changes key frequently. Piano accompaniments can be purchased separately in Tezak's volume 3 (item #27620). Synthesized accompaniments ontwo audio compact discs are included with Schwartz's volume 3 for trumpet (item 60443) or trombone (item 43470).