Performing Pigments
Swiss photographer Fabian Oefner created his series “Dancing Colors” to represent a connection between the audio and visual worlds. In an elaborate process, Oefner dyed grains of sand, then placed them on top of a speaker wrapped in plastic, causing the grains to vibrate each time a sound was emitted through the speaker. He used a device in which the microphone sends a signal to the flashes so that the camera can quickly capture the illuminated but ephemeral dance on display.
The Brooklyn Bakery Blog 