Then all you have to do is patch in 'preset trigger' to catalyst
If you want the sound and video to be exactly in sync frame by frame you MUST use either MIDI or SMPTE timecode... theres no other way of doing it.
You must get the soundman to output MIDI or SMPTE timecode when he plays the relevant tracks. This will then make the sound sync with the video.
This is usually built in to many sound replay programs - so it depends what your soundman is using...
If the soundman cannot output MIDI or SMPTE - then you cant sync the sound and video - and will have to rely on JUST a start trigger from artnet/DMX
Qlab won't help you...
S