Displaying audio volume on my analog meter + led

Hi, anyone know any similar project like: http://www.youtube.com/watch?v=fQ3OCSz6qYw&feature=related

which is available for learning over the web ( Arduino code + Processing Code + Symantic ) ? I am trying something very similar to this.

Search the arduino site for "equalizer" and "8 bit FFT"

The analog MM can be connected to a PWM output - so check PWM on the tutorial pages of arduino.cc