http://www.npr.org/2013/03/01/173275533/the-mix-the-austin-100
NPR is hosting a single 813.00 megabyte zip file that contains 100 free mp3 songs from this year's Austin, Texas SXSW event on their website. You can download individual tracks for free as well. I just thought that more people should know about this just in case you wanted to attend the 2013 SXSW, but you couldn't make it to the event.
