Orphism: A Metaphysical Overlay on Dionys

Orphism is a metaphysical overlay on traditional Dionys and rites, right? Because on the one hand, you have this sort of God of music who brings an ecstatic God to Greece. And I've never quite got how it's sat with Orphism, which is quite hall monetary if you do it wrong. But looking across half a dozen or so different platonic dialogues, it's quite clear that there's at least five key principles, which I think Plato at least perceived as core to Orphism.