Repetition plays a profound role in how we experience music. It triggers a shift in perception where sounds transform from mere auditory input into a participatory, musical experience. The "mere exposure effect" makes us like things more upon repeated exposure, but with music, repetition goes further - it alters our brain circuitry to hear sequences as sung rather than spoken. Repetition focuses our attention on the sensory details of sound rather than meaning, inviting us to imaginatively model the patterns and rhythms. This engages the emotional centers of our brain even with music we dislike. Across cultures, repetitive musical forms like choruses and rondos facilitate an irresistible tendency to sing or move along. Ultimately, repetition carves familiar paths that allow us to anticipate and participate with the music, creating a transcendent sense of shared subjectivity with the sound.