Arduino sound reactive led's (strobe effect)

Hello!

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 http://www.princetronics.com/sound-sensitive-lights-w-sound-sensor-arduino/

That uses an input sound module, so for you change the input to this in reply #7 http://forum.arduino.cc/index.php?topic=246581.0

Thank You Grumpy_Mike !

I will try this one !