https://www.facebook.com/SPIN?sk=app_128953167177144
Go to their facebook page and enter your email...they'll send you a download link.
Some titles available are:
Circuital - My Morning Jacket
Woe is Me - The Walkmen
Down the Road Tonight - Hayes Carll
Harlem River Blues - ?
Burn Thru - Abigail Washburn
Twenty Miles - Deer Tick
Trembling Hands - Explosions in the Sky
Don't Look Back - Kylesa
Shredder - Jeff the Brotherhood
Baby Drugs - Tristen
Don't Do It - Sharon Von Etten
Lie Awake - Alison Krauss and Union Station
The Last Time - Black Dub
All Your Goodies are Gonne - Dennis Coffey
Angel Dance - Robert Plant
Trans-Continental Hustler - Gogol Bordello
Lisa Baby - Walk the Moon
I Can't Wait - Twin Shadow
Freaks and Geeks - Childish Gambino
Cosmic Love - Florence and the Machine