Exclusive content is all the rage these days when it comes to music streaming services, and Amazon has some new goods of its own. The retailer announced Amazon Acoustics today, a collection of unplugged performances from a variety of artists. As you might expect, the songs are only available for purchase from Amazon or streaming from Prime Music. And yes, Prime members get them at no additional charge. In terms of the artist lineup, there are originals and covers from JJ Grey, Train, Five For Fighting, Michelle Branch, Marc Roberge of O.A.R., Surfer Blood, Deer Tick and more for 32 total tracks.