[youtube]http://www.youtube.com/watch?v=kUO0_8D1yg0[/youtube] San Francisco Community Music Center, July 20 – 23, 2011  The first sound of the festival’s Wednesday night show was, perhaps appropriately, nothing. Theresa Wong started offstage, down front, with just a microphone. She circled it in front of her face, no sound coming out of her pursed lips. Fluid looping gestures, but no vocal to be heard for perhaps two minutes. Then, a “Woo.” Silence, the mic passing back and forth. “Hoo,” silence, then another and another. Hoots and cuckoos, then a low-flutter “Wo – wo – wo – wo” for thirty seconds, then putting the mic to