Beam + Sub + 2xERA300 music suddenly “not encoded correctly”

  • 12 November 2023
  • 4 replies

My system turned south today for no apparent reason. Running firmware 15.9. Same thing happens on iPad, running 16.6.1 and iPhone. So far it happened on only Atmos songs, have not tried others.

lt plays for a minute or so, and then shows the message not encoded correctly, and then jumps ahead 1 or 2 songs, and repeats. Running Apple Music from the Sonos app. ERA300s set to stereo mode.


Help, this is the first real problem I have had with Sonos!!


Best answer by autks 13 November 2023, 20:07

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4 replies

I would perhaps keep things simple and just start with a reboot of the router and maybe if that doesn't fix it, then give the speakers a power-cycle too.

Userlevel 7


A few things in addition to what @Ken_Griffiths suggested:

What do you mean the Era 300’s are set to stereo; as there is no such setting. Are you trying to say they are:

  • Setup as a stereo pair  OR
  • Era’s are part of a home theater as surrounds and are set to play in full stereo for music 

Also, the latest iOS is iOS 17 (possibly 17.1.1 for some devices) 

  • iPhone 15
  • iPhone 15 Plus
  • iPhone 15 Pro
  • iPhone 15 Pro Max
  • iPhone 14
  • iPhone 14 Plus
  • iPhone 14 Pro
  • iPhone 14 Pro Max
  • iPhone 13
  • iPhone 13 mini
  • iPhone 13 Pro
  • iPhone 13 Pro Max
  • iPhone 12
  • iPhone 12 mini
  • iPhone 12 Pro
  • iPhone 12 Pro Max
  • iPhone 11
  • iPhone 11 Pro
  • iPhone 11 Pro Max
  • iPhone XS
  • iPhone XS Max
  • iPhone XR
  • iPhone SE
    (2nd generation or later)

The latest iPadOS is iPadOS 17 (possibly 17.1.1 for some devices) 

  • iPad Pro 12.9-inch (2nd generation and later)
  • iPad Pro 10.5-inch
  • iPad Pro 11-inch (1st generation and later)
  • iPad Air (3rd generation and later)
  • iPad (6th generation and later)
  • iPad mini (5th generation and later)

The device software may be the issue. Please update your device to see if the problem corrects itself.

A ““not encoded correctly”” error is typically due to network issues causing packet loss. It’s nothing to do with the iPadOS version at all (iPadOS 14 and higher are supported, and it could be an older iPad). The controller doesn’t participate in the traffic flow.

Duplicated IPs are a common culprit, hence Ken’s prescription. 

Rebooted router, and updated to OS17.1.1, rebooted all devices.  All seems to be ok now. Thanks for your help!