One of the more unusual recordings is "Hush", a collaborative effort which combines the talents of vocal artist Bobby McFerrin and classical cellist Yo-Yo Ma. Without the accompaniment of a symphony orchestra or even a quartet, Ma's cello and McFerrin's amazingly flexible voice blend seamlessly in this 13-track album which is comprised of an eclectic selection of McFerrin-composed songs and works by such composers as Vivaldi, Bach, and Gounod. Whether it's Vivaldi or jazz, it's all music and it's a lot of fun! This recording has been mastered by the K2 HD format of 24-bit 100kHz, which creates an unbelievable sound surpassing other formats! This K2 HD Mastering CD will play on all CD players!