song is not encoded correctly. i just paid 1900 for a sonos system and apple music does not play because of that pop-up

You talk to Apple Music, as they are the ones sending that ‘flag’ through to Sonos. 
 

As near as I can tell, it’s not high on Apple’s priority list, perhaps because people are complaining to Sonos, who has no ability to make changes on Apple’s servers. 

I'm getting this for the first time today. Stopping playback or sometimes skipping with the encoding error. Never had a problem with Sonos before (many years). Haven't moved any devices etc. I'm streaming from Amazon Unlimited via S2 app.

I'll submit a diagnostic if it is still happening tomorrow.

It's been going on for months. Neither Sonos nor Apple accept blame or have any intention of fixing it. The only work around I have been able to find is to go into my playlist and delete this song from my Apple Music library and then re-download it and then it seems to work. 

It’s so frustrating. However, it’s nothing to do with Apple in my case as I’m getting the problem when streaming Amazon Unlimited. It’s regular streaming, ie, not my own files I have added to the library.

Download it? Onto your mobile? The only way Sonos would be able to play an Apple Music download is if the user is playing via the native Apple Music app over AirPlay. Of course AirPlay introduces its own challenges as the stream has to loop across the network, through the mobile.

Amazon should adapt to adverse network conditions, temporarily falling back to SD if necessary. Have you consulted Sonos Support after submitting a system diagnostic?

Hi, well today it seems to be working perfectly again. First thing this morning, a speaker dropped out, so firstly I checked my mobile’s connection to my WiFi. It was on Randomised MAC and the speed was low so I changed to Phone MAC with a really fast speed. (Sometimes this happens on my phone, don’t know why, and changing this setting fixes the speed). I then followed the basic troubleshooting (turn speakers off and on, wait for 1-2 minutes etc). Then I decided to try just using the device that I troubleshooted with (my Android mobile) to control Sonos via S2.  Not sure if that has anything to do with it but I have several other devices (iPad, Android tablet, Android phone, Mac) that I control Sonos with, so I haven’t used those again yet.

The other thing I’ve done so far is play in both my rooms at all times (not just one room), at least for now.

As I say, seems to be perfect now. Not sure if any of the things I did above fixed it or not though to be honest.

It’s sounding rather as if you might have experienced IP address duplication for a while. Consult your router documentation and reserve/fix the IP addresses for common network clients such as Sonos devices and mobiles. Disable randomised MAC addresses on mobiles when connected to your home WiFi.

Thanks v much. Will do. Seems that I might have stumbled on the cause by accident, so thanks for outlining the steps to keep it running properly. 👍