Here are some free MP3 downloads by artists that have performed free concerts.
Yeasayer One http://yeasayer.net/
David Byrne and Fat Boy Slim “Please Don’t” Feat. Santigold
The Soft Pack “Answer To Yourself”
“C’mon”
Fences (Phoenix cover) via Stereogum
Grizzly BearBoy From School via Stereogum
Ted Leo Joey (Concrete Blonde Cover) via Stereogum
Jay Reatard: “Frances Farmer Will Have Her Revenge on Seattle” (Nirvana cover) via Pitchfork
Beach House Norway