Sonata (Neuheit Posaune) SONATA per il Flauto traverso solo senza Basso, by C.P.E. Bach appeared in 1763 in the fourth quarter publication of Musikalisches Mancherley, a musical quarterly printed in Berlin. In transcribing the work for Trombone, Mr. Sauer has changed the original key of A minor to C minor and has revised the order of the movements to a more typical fast-slow-fast pattern. This work in three movements is suitable for advanced performers.