Using bpm syncing and sound to effect media?

Hi guys, i would like some info, on BPM and audio syncing. i wish to use the bpm to for example change the colour of the media beeing played.......so how would i get the bpm to effect the media in the layer.....?
Also how can i use an audio feed to effect the media? being played, or 3d models?
thanks guys

bit more detail..........in what id like to do.
i would like to use different freaquencies from the audio feed to effect things like the colour of the media....the scale of the media........ect how might i go about this....need to sort it for NYE event....