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I found the solution !
I opened the zero 4 and there was a cable which was disconnected.
that's not serious for a professional product that I just buy.
but it's ok now I'm happy.
I'm happy user of Zero4 with my technics 1200's and ms pinky+ableton, running on macbook everything works just fine,system can see the firewire audio channels...but
I bought the denon hd2500 a ...