The Megapolis Audio Festival is a DIY/volunteer-run weekend celebrating the art of sound. I was a co-organizer of the 2015 festival in Oakland & San Francisco, working with a team that included Justin Grotelueschen, Shani Aviram, and Lina Misitzis. Guests/participants included: Matmos, Doseone, Fantastic Negrito, The Kitchen Sisters, Song Exploder, Roman Mars, Here Be Monsters, Al Letson, George Lavender, and many more. Here's a nice write-up of what happened.