Just occasionally I've had a similar problem with one of my DSP6ks. This seems to mostly occur after a period away when I have powered down the speakers. After a couple of episodes I have focussed on the SPDIF cable and/or connections as the most likely culprit as unplugging at speaker and/or processor and re-connecting seems to solve the problem. Unfortunately my "frantic" efforts to get it working have not allowed me the true systematic investigation my analytic mind desires.

Once it's working it seems OK until I leave it for a while.

Hope this helps,

Chris

Lounge/Cinema, Trinnov, DSP8000XE, 4x 320.2 in-ceiling, M6 rear, 2x DSW.2
Roon Nucleus+ and 320.2 in-ceiling in many rooms (KEF in-ceiling in bathrooms)
Spare: DSP5000, 598, 562v2, 500Mk2, 518, 519, 504, 101B, M3, 861v4, 800 DVD, MS600, MC200