It's a not-to-be-missed experience: a solo recital by the world's most famous cellist, in the gorgeous outdoor surroundings of Berkeley's Greek Theatre. Yo-Yo Ma's breathtakingly virtuosic recordings of Bach's unaccompanied cello suites more than 30 years ago became an instant classic; he re-recorded them in a series of award-winning videos in 1997. In his career, Ma has released more than 90 albums, earned 17 Grammys, and received the National Medal of Arts and the Presidential Medal of Freedom.