wyred4sound Sonos Port - garbled noise

Is it doing it both on wifi and wired?   I had a regular ZP 90 network wifi card die but wired portion still works fine.  Got a old ZP90 with W4S mode still going strong after all these years.  

Also you could open a case with Sonos and see if they can run a trace.  Wont be able to help you with it of course but might be able to identify the issue.

Thanks Jbuhl - yes, it is doing it with both wired and wireless.  Tried a couple of different DAC's too to narrow down the issue.  

A ticket with Sonos may not be a bad idea.. thanks!

Strange - it looks to directly be related to the volume.  Below 25% the sound is fine, above that, it starts to get progressively more garbled until it is completely white noise at 100%.  I'm sure there is a digital explanation for this?  Bit dropping?

i have two in our second home, they both work fine

According to W4S it looks to be an update by Sonos that is causing the issue.  For those that do not yet have the issue, suggest you hold off on any automatic updates if possible.  W4S looking into a solution.