yesterday i attempted to play around with the audio qualities behind my spi-dog. in doing so, I figured a photo sensor would allow me to alter the voltage going into the speaker which would alter the volume. with little success i decided to see if there was power still going into the speaker, to do this i used a LED. to my surprise, i found that the LED closed the circuit and caused the speaker to produce a fuzzy sound. what so more interesting was the fact that the LED was responsive to the voltage and flickered on and off depending how much power was being feed thought the speaker. previous to this, i was always under the impression that it was a constant flow of power.
as the project developed i attached a relay to the audio circut, previously i've been having difficulty finding an appropriate switch for the relay but with this LED flicker on and off depending on the sound and beat of the music this offered and interesting opportunity. for me, i found the audio quality of the relay turning on and off very pleasing and because of this patrick advised me to look at the automates ki which is a sound installation involving machine that produced sound by hitting various objects.
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