I'm not familiar with the Apogee stuff, but in my experience running a big Roland VM-7200 rig with my PARIS system and H8000FW, having consistent word clock to everything solved all my clicking and popping problems! If you're connecting two things digitally, then you should make one device the word clock master and slave the other device to it. If you have multiple devices that talk to each other digitally, you should get a word clock generator and slave everything to that. I use a Lucid GENx6 myself…
