Otto Sidharta stands on the stage with two laptops, a sound card, a small mixer, three microphones, a drum and a gender (traditional Javanese musical instrument).

Slowly, his fingers begin to tap and spin the mixing knobs. Soft noises float out, gradually reaching a crescendo creating a surreal surround-sound effect.

Otto is not playing pre-recorded sounds, however. Through electromagnetic sensors installed on his electronic devices, he is capt