The Sound Mode indicator does not light up in cyan even when I cast (play) when using the 360 Reality Audio compatible streaming app. (SRS-RA Series)

Check the following to troubleshoot this issue:

• Check that the music you are playing is compatible with 360 Reality Audio.
  
  Note: Please be aware that some of the music content offered in the 360 Reality Audio music streaming app is not 360 Reality Audio compatible.
• Check that the smartphone and the speaker are connected to the same Wi-Fi network.
  
  Note: You cannot play 360 Reality Audio music via Bluetooth connection.

• When you cast 360 Reality Audio music using the Amazon Music service, select 3D Audio music in the Amazon Music app, and then tap the circle icon that represents the device.
  

  Note: If you tap the square icon , the music is cast via Chromecast built-in and cannot be played using 360 Reality Audio feature.
  
  
  A: Chromecast built-in device name (2-channel playback available)
  
  Note: This icon will be displayed only for Android apps.
  
  B: Amazon Alexa device name (360 Reality Audio playback available)

  For details, refer to the How to play 360 Reality Audio music using the Amazon Music Unlimited service article.