"Michele Spinolo" <michele.spinolo@xxxxxx>: > the clock signal is generated internally by RME ADI-8 Pro (48Khz), > which is connected by word clock BNC cable to RME HDSP9652, which is > setted in slave mode. > Z-sys z-8.8s does not have an internal clock, so this is provided > through its input 1 by ADI-8 Pro ADAT output; the Z-sys unit is also I wonder if the Z-sys is wordclock aware even. Is it? http://www.z-sys.com/pp_routing.html#z8 says "Also, the unit is fully asynchronous which allows it to handle multiple sample rates at the same time." Makes me think that your setup won't work because the 3 spdif pairs' timing gets screwed the moment it enters the Z-sys. Hm, but I might just as well have misunderstood your signalflow. Wolfgang