The Q119 is the synthesizers.com sequencer right? There's no way to sync that to your computer without using MIDI, I'm almost positive. Computers use MIDI. You'll need the Q104 MIDI interface, assuming you're using all modules. The method I mentioned before was not using an analog sequencer and was syncing to a hardware recording device.
Ask Jon Sonnenberg at the Travelogue forum:
http://www.traveloguefans.com/forum/index.php?board=9.0He's an electronic musician who uses a set-up just like you're talking about and could tell you practically anything you need to know. Actually, I'm going to some day purchase a modular synthesizer and had this exact topic in mind at one point.