Mirroring

pk164,

You mentioned that HDMI ARC wasn't working - a couple things you can do

• "Make sure that your TV supports ARC or eARC. You can check by seeing if there's an ARC label next to your HDMI port, or you can contact your TV manufacturer.
• You might have to turn on ARC, eARC, or HDMI-CEC in the settings of your TV. Check with your TV manufacturer for details. 
• Unplug the HDMI cables from your TV then plug the cables in again and try to use ARC or eARC. "

That is an excerpt from the article Use HDMI ARC or eARC with your Apple TV 4K.

Additionally, do be sure to connect with Sonos support, we'll include the links below again. They may be able to shed some light on options or settings to remedy this. Help and Support | Sonos

Thanks.

Hi there pk164,

Does it work with the TV sound selected as the audio source?

If you don't hear audio when streaming video from your iOS device or Mac to your Apple TV, make sure that the volume is turned up and not muted on both your iOS device and your television or receiver. 

Make sure you've reviewed the information here: If screen mirroring or streaming isn't working on your AirPlay-compatible device - Apple Support

Also, check to see if your Sonos speaker is compatible with AirPlay. If so, you'll see it listed here: Home app - Accessories - Apple

Take care.

Hey pk164,

Is this behavior consistent no matter what is being displayed, or is it only happening when specific items are being AirPlayed to the TV, such as streaming content? This could be important because some content, specifically items from some streaming services, may not be able to be shown over AirPlay with full video and audio. Just wanting to make sure that isn't the case. Sonos does have a guide for setting up their products to work with audio streaming, but it doesn't mention video streaming, so may want to check with them for more details if Stream AirPlay audio to Sonos doesn't help.

Sonos support is available here.

Take care.

Hi pk164,

It may be best to contact Sonos support for additional help with this. You can also contact Apple Support directly.

All the best!