Using a large-aperture stereo photodiode amplifier designed by Eric Archer of Rare Waves LLC, we captured the hidden soundscape emitted by vehicles and architectural lighting in downtown Dallas. This video montage was recorded with the photodiode amplifier mounted under the camcorder, by connecting the photodiode’s audio output to the camcorder’s mic in jack. All of the sounds are being emitted by lights in the scene – no effects or synthesizers were used. The city is full of ambient frequencies and tones that exist exclusively in the realm of subtle flickering lights.
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