Hi Dan, thanks for replying.
I've recorded whats happening in the two apps that I used, hopefully this will help explain the methods used better than me confusing everyone with my discription, you can hear and see there are problems with the midi this is why I want to work just in the one app, automating the composition would be preferable to the live controlling that I'm doing here.
Would it be possible to add two sliders in to your expression, that could then be keyframed? I'm not sure but I think that using markers is going to be too complicated, maybe I'm wrong, but anyway here's the vid, it should make things clearer.
Lights 2 from ni-cad on Vimeo.