Great layout and design, but honestly how is this much different than Soundcloud? The little things like the history and play queue feature are great, but what would make me want to prefer this to SC, in which I've already curated a big list of people/labels/etc to follow and give me new music all the time? In comparison, this might broaden my horizon every once in a while, but also runs the risk of giving me a lot of tracks I'm not interested in. I think it's going to be important that in the future the user is given some more control and selectivity (in addition to some more social components). Good work.
Edit: punctuation