Abstract: Using a basic microcontroller or maybe digital signal processor (DSP), one would program it to run a Fast Fourier Transform (FFT) application on microphone input. User would set thresholds for an array of LEDs (different colours) to switch on and off when a given frequency range at a >= level was reached within a set time. This would then trigger LEDs to match the “mood” or “tone” of the music or audio coming into the micro. Maybe added a smoke machine/firecrackers for better effect? :P
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