You can change the audio settings of your Google Nest or Home speakers or displays, and Chromecast devices in the Google Home app.
Adjust bass and treble level
Turn on surround sound
You can choose to turn on surround sound on your Chromecast or Chromecast Ultra.
- Make sure your mobile device or tablet is connected to the same Wi-Fi or linked to the same account as your Chromecast or Chromecast Ultra.
- Open the Google Home app .
- Tap your device Settings .
- Scroll down to "Sound settings" tap Surround sound.
Note: By default, surround sound mode will be set to auto-detect. But, you can change the mode to AC3/EAC3 surround sound, AC3 surround sound only, or Stereo only. Check the modes your TV supports before you change this setting. This might result in no audio if your TV doesn't support a specific mode.