Clarification
I think I can explain this a bit better, I use 2 ADAT XT20's connected via. lightpipe to an O2R.
1. Each lightpipe can only send 8 chanels of 20 bit 48khz audio.
-- I'm waiting for 8chanels of 24 bit 96khz myself
2. You want the ADAT's synced to each other (they come with a cable to do that in the box)
3. DON'T MOVE ADAT's, for a whole year we were continuosly having ADAT's replaced due to a fried transport because of being moved around, find there place and leave them there -- don't move them between the studio and you pc.
4. You want a PC soundcard with 4 lightpipe connectors and either an ADAT sync or a workclok input. IE. 2 in, 2 out (if you want 16 channels out otherwise just 2 in), I suggest getting this in addition to your current soundcard.
5. for 2 or more ADAT's I reccoment getting a BRC and using that to control the recorders.
-- I put a LRC remote (transport remote) into one of the connectors on the back of the brc, then attatching it to a blank part of the O2R, helps a lot during recording sessions, I put the other in front of the ADAT's themselves to remind me to not use their controls (does bad things)
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