Here it is: The annual South by Southwest Music festival music torrents. At this site you will find more than six GIGabytes of free music available for downloading. That’s over 1100 songs.
It usually takes me better than a year to go through it all. Generally, you’ll find that this collection contains roughly one-quarter awful, half take-it-or-leave-it, and one-quarter borderline amazing music.
You will need a torrent transfer utility. If you have a Mac (and who doesn’t these days?), I recommend Transmission.