"Ko-Ko" is a 1945 bebop recording composed by Charlie Parker. The original recorded version features 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 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.
The piece starts in the key of B flat minor. It is based upon the chord changes of the song " Cherokee" by Ray Noble.