The Internet Archive - Old Time Radio

OK, not quite music. Forgive me if I have posted this before, but this free source (but please donate, triple match right now) has a wealth of old radio shows to download. Other Internet Archive categories are listed here. They have a great collection of audiobooks, and the collections from universities and foundations have some of everything. https://archive.org/

https://archive.org/details/oldtimer...wnloads&page=2

They even have recordings of some of the strangest, most esoteric uses of audio - Numbers Station shortwave broadcasts.

https://archive.org/details/ird059