I am building a project of a model car with music and want to have led s that flash to the music. Can someone direct me to the best reference to choose the best concept to go forward with. Any references that would help me form ideas would be appreciated.

 

It's called a "light organ". Google that and the world is yours!

 

The terms "color organ" and "sound to light" will also yield some circuits.

 

LEDs, 555s, Flashers, and Light Chasers

Chapter 12