Eleven days ago, Harmonix delivered on a concept many of us had fantasized about since the very first time we ever played Rock Band: It democratized the track-making process. For the first time in the franchise's history, any schmo off the street with a bit of MIDI engineering experience and a song in their heart could put that song on the Rock Band Store for the world to see (and hopefully purchase).

At GDC, Harmonix senior sound designer Caleb Epps and Rock Band Network producer Matthew Nordhouse sat down to speak about the challenges that came with opening up the game to user-generated content, and how its dedicated community has organically evolved the song-sharing process.