belief in the curative powers of music, esp. of the flute, seems to have been derived originally from actual experience of the καθάρσεις practised in Korybantic festivals, and then to have been exaggerated into a fable.
Rohde argues that the flute’s reputation for curing madness and passion derives from its demonstrable role in Corybantic catharsis, extended through mythologization into a broader medical fable.
, Psyche: The Cult of Souls and the Belief in Immortality among the Greeks, 1894thesis