Musik im Bauch (Music in the Belly) is a piece of scenic music for six percussionists and music boxes composed by Karlheinz Stockhausen in 1975, and is Number 41 in his catalog of works. The world premiere was presented on 28 March 1975 as part of the Royan Festival. The performance was given by Les Percussions de Strasbourg in the haras (horse stable) in the town of Saintes, near to Royan. Its duration is roughly 38 minutes.