This article explores music and the genesis of the aesthetics of music from the economic point of view. Brousselle emphasizes the themes of tension and relaxation of tension, repetition and the denial of loss, as exemplified in the "Fort-Da" game Freud observed in his grandchild. He gives some technical analyses of music, ranging from classical and romantic to Wozzeck, and makes some suggestions about what he calls "post-Wagnerian metapsychology."