I've never used ADAT so I am clueless. Reason I'm asking is I have two RME ADI-8 QS that are stellar, I love them but I'm not using them now because I replaced these for the Orion 32, which I'm not completely thrilled about in comparison to the sound quality of the QS' but hey, the Orion 32 has 32 ADDA channels and its good enough for jazz. I would have to spend $6000 more to get another 16 ADDA of QS' and that isn't going to happen. BUT! I could be using one of these QS' for my capture ADDA and another one for my daughters project studio but I don't have the interfaces for them now as I sold my AES EBU card and replaced it for a MADI interface. The QS' also have ADAT I/O so what can I do with that? What interface and options do I have? I could buy a used HDSPe AIO for around $450. Would I get the same 8 ADDA channels with ADAT ( 44.1 or better? Does ADAT work well? What options do I have with these ADI-8 QS converters now? I'd rather be using them over giving them away for a song. No one knows what these are so they aren't selling. Any suggestions? Thanks!