Arduino sound reactive led's (strobe effect)


What is the easy way to make sound reactive led's with arduino? I hope to make some sound reactive led's for new year party! I want to use signal output from music center. I don't wanna use microphone.

I know someone have a good schematic or some idea! 8)

The basic circuit use this

That uses an input sound module, so for you change the input to this in reply #7

Thank You Grumpy_Mike !

I will try this one !