I am curious about the feasibility and price of such a project. My plan is to have a microphone, or perhaps piezo, to listen for bass in ambient music, and control a servo relative to the bass hits on the music (i.e. servo all the way one way at max bass amplitude, all the way the other at minimum amplitude). Ideally, the min and max would be relative to the volume of the ambient music, so loud music would appear the same as quiet music. Also (or instead of the last comment), the project would have a sensitivity knob (potentiometer on the mic?).
The end goal is to project a laser on a spinning mirror (creating a plane) and then bouncing that off of a mirror attached to a servo, to make the plane bounce up and down to the bass.
Thanks in advance!