Hi,
You might have noticed the big heap of modules in the public library with Wavetick prefix.
Those are the realtime music mapping modules meant to be used together with Wavetick.
http://wavesum.net/products.html#Wavetick
Some of them deal with text and video, some controlling Moving heads and generic DMX RGB fixtures.
I made 2 short tutorials to get you started:
Basic music mapping tutorial:
https://www.youtube.com/watch?v=fQCEpmeBBXU
Music mapped lighting tutorial:
https://www.youtube.com/watch?v=XVbmBJoK9Is