Thanks for the info. I'll try switching the order and see what happens. Currently the ADAT is slaved from the 888, and has been for several years with no problems, that's why I'm baffled. This clock jitter, which I'm positive is clock problems because of the readout on the control panel that I can see drifting, popped up out of the blue about 3 weeks ago. Nothing has changed in the studio. I did do a 48k transfer a while back, but everything is set back to normal. Hopefully the order change will restore the clock. Thanks Tim