Does the Sonos app now not show what audio format is being used? It used to be there but I can’t see it on my setup now.
Best answer by neilandjan
Ok. Panic over.
I decided to re-boot everything. And it is now showing the format.
Sorry to waste your time. I should have done that first. After all, with modern technology the ultimate solution is usually to “unplug and re-plug” first.