How to make a bar spectrum analyzer (or graphic equalizer) from a dresser?
I have an Ikea dresser with smoked glass panels recessed in the front of each drawer, and there are six identical drawers stacked on top of each other (www.ikea.com/us/en/catalog/products/40129591). I was looking at it the other day, and thought, "Hey, why not try to make it into an EQ?" I'd like to have it driven either by a line level signal (in which case, I'd still want to be able to pull the signal out the other side, unchanged) or by a microphone/pickup of some kind.
So my questions are:
What would be the simplest way to make the controller to drive the EQ bar lights?
Is it feasible to use incandescent light bulbs to light the glass, or would it be difficult/impossible to sync them precisely to music?