The Making of Trout Mask Replica 

150px Trout Mask Replica Captain Beefheart, al...

Source: Pitchfork.

Beefheart put a piano in the house—despite not knowing how to play it—and banged out ideas, which French transcribed and assembled into tunes. The resulting pieces were more like puzzles than songs, giving different instruments conflicting time signatures and varying part lengths that had to somehow meet at specific points. French compared it to building a solid wall with bricks of unequal size. This unorthodox complexity forced the Magic Band to rehearse 12 hours or more a day, usually without Beefheart. Often they would sleep right where they had just practiced, and immediately continue upon waking.