Total posts : 45366
Much of the material there is under Creative Commons, but a lot of it is ok at least if you’re noncommercial. I think some of it allows commercial use as well, but since my station has never been a business project, I don’t notice.
It’s still good where possible to get in touch with the artists and let them know how you found them and that you’re playing it. That can get you new tracks that aren’t up yet or even a band CD once in a while.
Also at least on archive.org sometimes there’s a link back to a website which may be (or contain a link to) whole little indie companies with yet more music.
The challenge/work isn’t so much finding music you can play. There’s actually quite a lot of it out there. It’s going through it and finding what’s good/cool enough and figuring out how to make good playlists that your listeners will enjoy and keep listening to. That’s a bit different than oh, a top-40 format where there’s a lot of reliable songs/bands/genres that already have listener familiarity and promotional push behind them.
But if you really like new music and are up for that challenge, it can be great fun.