I posted it here as I'm not necessarily needing to hook up Arduino for this.
I'm wanting to make a light reactive LED matrix, of sorts that respond to pitch not volume, that will be compact enough to fit inside and XBox 360 face plate.
Problem is... I've tried googling for ideas and getting pretty much no-where.
I'm guessing a simple form of a graphic equaliser but with the LED's being all rather random would be ideal.
band-pass filters, feed in to analog inputs.. what you are looking for is called a spectrum analyzer.
There's also chips out there that do this via FFT (fast fourier transformations) but I don't think Arduino has the horsepower to do it. Given that, bandpass in the audio, scatter the output LED's around, there ya go.
