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I have a MOTU 424 which pumps out level via optical like you would not believe. I recently got an M Audio 410 which I am using to DJ with using my macbook pro and LIVE and the analogue level which it puts out is about half of what my MOTU kicks out, why would this be ?

guys, just a quickie. at the moment i am useing a MOTU 424 card linked up to my mackie D8B which produces a really hot strong audio signal via light cable into the desk. I have recently borrowed an M AUDIO 410 firewire audio interface to DJ with via my macbook useing ableton, the odd thing is the an...