I think depending how you wanna do this, a msgeq7 ic would work well,
it would take the total output of the mic/mics and it outputs a multiplexed value for 7 audio bands,
you can then tke those vlues and light up leds according the strengths with pwm
I've used it for 3 channel light shows to general music but I think it would work well in your case
if you need code I got plenty