Change your sound settings

You can adjust the bass and treble on Google Nest or Google Home speakers or displays, Chromecast Audio devices and speakers with Chromecast Built-In. You can find these settings under the equaliser setting in the Google Home app. 

1. Make sure your mobile device or tablet is connected to the same Wi-Fi or linked to the same account as your Chromecast, Nest speaker, or Nest display.
2. Open the Google Home app .
3. Tap the device that you want to adjust.
4. At the top-right corner, tap Equaliser settings .
5. Adjust Bass and Treble level.