Music is central to psychedelic-assisted therapy, but there’s little agreement on what works best. Only three empirical studies have tested music types, and findings conflict: classical, overtone, and practitioner-curated playlists show no clear winner. Experts disagree on whether music should be standardized or personalized, continuous or interspersed with silence. This review calls out the research gap, noting that therapy outcomes hinge on music yet guidelines remain based more on opinion than science.