Oscar Emmanuel Peterson (August 15, 1925 – December 23, 2007) was a Canadian jazz pianist and composer. He was called the "Maharaja of the keyboard" by Duke Ellington, "O.P." by his friends. He released over 200 recordings, won seven Grammy Awards, and received other numerous awards and honours over the course of his career. He is considered to have been one of the greatest jazz pianists of all time, having played thousands of live concerts to audiences worldwide in a career lasting more than 60 years
Peterson redefined the jazz trio by bringing musicianship of all three members to the highest level. The definitive trio with Ray Brown and Herb Ellis was, in his own words "the most stimulating" and productive setting for public performances as well as in studio recordings. In the early 1950s, Peterson began performing with Ray Brown and Charlie Smith as the Oscar Peterson Trio. Shortly afterward the drummer Smith was replaced by guitarist Irving Ashby, formerly of the Nat King Cole Trio. Ashby, who was a swing guitarist, was soon replaced by Barney Kessel. Kessel tired of touring after a year, and was succeeded by Herb Ellis. As Ellis was white, Peterson's trios were racially integrated, a controversial move at the time that was fraught with difficulties with segregationist whites and blacks.