I was thinking about getting a PreSonus DigiMAX LT and using it with GarageBand on my iMac Core Duo. The DigiMAX has an ADAT Lightpipe output. My question is (and forgive me if this is a newb kind of question, I don't know a whole lot about lightpipe), is the optical input compatible with lightpipe? If not, how can I convert lightpipe to something I can use? Thanks in advance.