It is all too easy and too simple to disdain as "superstition" everything one cannot understand, but the ancients themselves knew very well what they meant when they used symbolic language...the Spirit can always come back to breathe fresh life into the symbols and rites and give them back their lost meaning and the fullness of their original virtue.
Music has a divine message and messenger of life. It was quintessentially the "Quickening art" -- quickening my soul with this my body, so that suddenly, spontaneously, I was quickened into motion, my own perceptual and kinetic melody, quickened into life by the inner life of music. I was carried ahead by the ongoing musical stream.