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Yeah, I understand what you’re saying. I’m not looking to have an LED equalizer or anything. I just want the amplitude of the waveform to correspond to the brightness of the LED. I don’t need one specific for bass, one for treble, etc. Just the overall volume of the song, the amplitude of the audio waveform signal to fade the LED with varying intensity. I tried mapping it like I said, but even without the audio input to one of the analog pins, just the pin by itself when I read the values, they have electrical noise associated with them. If there was a way to mute the noise, I believe the resulting voltages on the pin would be only from the audio signal. Is there a way to do this?