When we were creating Mixx, one of our biggest problems was the music library we could offer users. We explored partnering with music providers, but we knew the importance of sharing the exact version of a song, be it an original, cover, a sample, or remix. For Mixx, uploading was our only option.

With MP3 uploads as a must, we had to do something to make sure that we didn't turn into another P2P application, but what? And how could we make sure that we stayed within the realm of fair use?