I'm using a Motu 896 to record some musc and I'm also using a Blackface Adat (with a dead transpot) as an A/D converter to add 8 extra channels via the Motu's lightpipe. Do I need some sort of external sync to phase lock the two devices or should I be able to lock the Adat to the Motu with the Adat in. I know I don't need external synce with a digital mixer but I'm not sure about an Adat when I'm not running any tape. Any help would be appreciated. If this doesn't work then it's off to rent an A/D converter.