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Ever since the new update my music I stream to my Sonos Arc continually cuts out, even skips songs or quits entirely. 
My fix was to go into my Internet provider and set my wifi on the Network from channel 1, 6 or 11 to automatic. This has seemed to fix the issue as there is interference if it is set on one of the 3 settings ( channel 1, channel 6 or channel 11) once I set it to Auto it picks the channel with the least interference. You may have to contact your Internet provider to do this if you don’t know how to log into your specific IP address.

I hope this helps others as I spent hours with the support team with no resolve. I even asked them how to change the channel setting but they didn’t know. Before the update you could go in under your device and under setting, under manage, under network then under channels and pick one of the 3 channels. I told them they should test their updates better before putting them out. I was ready to return my whole Sonos system.

The only issue sometimes with auto-selection of WiFi channels is that the router can change its channel on startup, reboot, update etc. and it may select an overlapping channel … that’s those channels surrounding 1, 6, or 11 and they can overlap WiFi signals or other device channels (zigbee etc.) and cause problems, so further down the line after a router restart, problems can sometimes return. 

I prefer to use a scanner App and find out what 2.4Ghz and 5Ghz WiFi channels are in use around the Home and then set the router to the best non-overlapping channel instead, but like everything I guess, it’s sometimes just as good to go with what may actually work for you.