[sdiy] newbie question Can a simple PIC16F628A be used as an audio filter trigger like a light organ

[Rob]

I'm an electronic hobbyist. Nothing professional.... just playing here.
The goal is to feed MP3 music to a light trigger circuit.
Something like a light organ.
But have a much finer granularity than a light organ that has low, mid 
and highs separation.
I have PIC16F628A chips and PicBasicPro so I was thinking of using 
PULSIN to look for audio tones... real high stuff... around 6kHz ,7kHz 
and 8kHz.

I had been building audio band bass filters with op-amps when it 
occurred to me that PicBasic WILL listen for tones and assign a value to 
a variable. But I had not seen anything that resembled this circuit before.