Check Device Compatibility
 
  - Ensure all devices are compatible with the multi-room audio feature. Older models may not support this feature.
 
 
Update Device Software
 
  - Open the Alexa app on your mobile device. Go to Devices, select the Echo device, and check for any available updates. Install updates if necessary.
 
 
Ensure Stable Network Connection
 
  - Make sure your Wi-Fi network is stable and that all Echo devices are connected to the same network frequency (preferably 2.4 GHz for better coverage).
 
  
  - Reboot your router to refresh the network if needed.
 
 
Restart Echo Devices
 
  - Unplug your Echo devices from power, wait for about 10 seconds, and then plug them back in to restart them.
 
 
Reconfigure Multi-Room Music Group
 
  - In the Alexa app, go to Devices and select Multi-Room Music. Remove the existing group and create a new one to reconfigure the settings.
 
 
Check Device Distances
 
  - Make sure your Echo devices are not too far from each other. Try to maintain an optimal distance for better connectivity.
 
 
Verify Cloud Synchronization
 
  - Ensure that the device settings are properly synced with your Amazon account. Check for any issues in the Alexa app.
 
 
Disable and Re-enable Multi-Room Feature
 
  - Temporarily disable the multi-room audio feature and then re-enable it to reset the configuration.
 
  
 
Contact Amazon Support
 
  - If the issue persists, contact Amazon support for further assistance, as there might be a hardware issue or a specific setting that needs attention.