I ran into this website while reading one of my regular journals, Astoria Oregon Rust. Let me quote him, because I don't really understand all the wheres, hows, and wherewithals about it.
"Since then I been checking out that link because it offers downloads of
works that have had their copy rights expire, meaning free downloads.
If you are really into the old stuff you can obtains volumes of free
"This site is also a resource for all sorts of stuff that is not copy
right protected: art, books on tape, live music recordings, films,
interviews and much more music. It also has stuff that artists want to
share with the public for free. So no matter if you are into the really
old stuff or the really new stuff, you can go there and download more
music than you will ever have time to listen to."
As if I needed anything else to keep me at the computer. There are several Grateful Dead concerts to download, just to give you a hint of what you might find.
Anyway, you'll find the website HERE.
I like the old Carter Family songs, and I found them on the site.
Just type a singer or group into the search box and see if you find them.