"Ko-Ko" (also spelled "Ko Ko" or "Koko") is a 1945 bebop recording composed by Charlie Parker. The original recorded version lists Parker on alto saxophone with trumpeter Miles Davis, double bassist Curley Russell and drummer Max Roach. Due to the absence of Bud Powell, Dizzy Gillespie was enlisted to play piano, instead of his usual trumpet. Pianist Sadik Hakim, then known as Argonne Thornton, was also known to be present at the session. Rumors persist to this day about precisely who played trumpet and piano on this piece; some claim it's young Miles Davis who plays trumpet and Gillespie comping at piano, on both takes; most claim Gillespie plays trumpet and, or instead of, piano; some claim Hakim is the pianist on all or part of one or both of the takes. However, Miles Davis confirms in his autobiography that he did not play trumpet on "Ko Ko": Dizzy Gillespie also confirms that he played trumpet on "Ko Ko" in an interview with Stanley Crouch in 1986, and that the trumpet intro was composed by Charlie Parker. The song begins with a harmonically ambiguous introduction but quickly transitions to B flat major at the top of Parker's first solo chorus. At this point, the harmony is now based upon the chord changes of the song "Cherokee" by Ray Noble. A drum solo by Max Roach ends the transition. The ending material is very similar to the introduction and features an unexpected ending. Overview A recording ban, imposed by the American Federation of Musicians from 1942 to 1944, prevented musicians in the nascent bebop movement from recording new works during the crucial formative period of this emerging genre. As a result, the "Ko Ko" session, along with the "Shaw 'Nuff" session led by Dizzy Gillespie earlier in the year, is considered by many to be the very first time Bebop was ever recorded. Charlie Parker said that while playing Ray Noble's tune "Cherokee", "I found that by using the higher intervals of a chord as a melody line and backing them with appropriately related changes, I could play the thing I'd been hearing." He had played that piece so many times that by the end he hated it, but he had mastered the chords perfectly in all 12 keys. "Ko Ko" has a partially improvised head and the chords are based on "Cherokee". In 2002, the Library of Congress added "Ko