Sweaty and exhausted, I lower the volume knob to zero. But the gymnasium is anything but silent. I put my hands in the air, the crowd screams, and I feel the euphoria with them. For the past three hours, I layered sounds and ideas on top of each other, resulting in a room full of excited kids. Music rearranges the entire body chemistry. The crowd moves. The crowd feels. The crowd dances. They can’t help but give themselves up...