Q:

Digital light organ

I am trying to make a circuit that takes an audio signal from an MP3 player and converts the signal into digital signals based on frequency.

Audio In is the is the signal from the audio jack of an android phone.
D9, D10, and D12 are all inputs of the ADAfruit Flora.
I suppose what I am asking for is critique of this design.

A:

Pretty standard Color Organ circuit. A buffer stage, going into three RC band-pass filters, to transistor based led sections. While op-amps might be better than transistors, it should still work. 

