I don't know the answer to your question, but take a look at git-annex [0] if you haven't already. One of the examples it gives is storing a music collection.

I don't know the answer to your question, but take a look at git-annex [0] if you haven't already. One of the examples it gives is storing a music collection. If I understand correctly, I don't think it automatically compresses every file - or at least gives you the ability to not compress it. [0]: https://git-annex.branchable.com/ https://git-annex.branchable.com/