Question about midi mapping audio clips to midi clips

So this video below about midi mapping is very useful, but what about doing it in reverse? Using an audio clip on track 1 to trigger a midi clip on track 2. For example, I have an mp3 audio clip on track 1 that I then want to trigger a midi clip (let's say it calls a lighting program in another software) on track 2 the second I trigger the mp3 audio clip on track 1?

I thought about just using scenes but that doesnt work for a A/B deck set up like we have.

Muchas gracias.

http://www.youtube.com/watch?v=cIjzcW_du3s

Why not just go the other way around? Trigger the MIDI clip first, and have that MIDI note trigger both the audio AND the lighting software.