As we walk down city streets, we're bombarded with noises -- car horns, backfiring buses, people yelling. To most of us it's a loud cacophony. But to sound artist Bill Fontana, each noise is an instrument that he weaves into a symphony in his head. His latest composition is a sound sculpture at the San Francisco Museum of Modern Art. For this work, Fontana went deep inside the building to collect his noises.
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