Circus Galop is a piece for player piano written by Marc-André Hamelin. It was composed between 1991 and 1994 and it is dedicated to Beatrix and Jürgen Hocker, piano roll makers. Its duration is approximately 4–5 minutes.Scores of this piece are available through the Sorabji Archive. Piano rolls of this piece are available from Wolfgang Heisig and Jürgen Hocker, who have recorded all three of Hamelin's player piano pieces on the MDG label, which were released in April 2008.
It is impossible for a single human to play, as at some points all the piano staves are played at the same time, and up to 21 notes simultaneously. It is used to test MIDI software to drive it to its maximum potential, such as Synthesia, or PianoMIDI.