Sounds sensitive leds

Lynxmotion
1

Hi,
I’d like to add another particular to my last work,so I’m thinking to add a sort of ‘sounds sensitive leds’:
A led ( or more ) that changes intensity when there is a sound… How can i do?
I don’t know so much about that things,can sameone help me?

2

Google LED color organ schematic for this.

Here is one I found.
apogeekits.com/color_organ_light_kit.htm

3

Thanx a lot!!!
Thanx to ur link I’m watching many other possibilities to add samething good to my work!
When I’ll have a little free time I’ll work on!