Google Nest Community

Update: tv audio set to pcm. In Amazon Prime turned off Dolby Enhanced Option while in casting mode, and voila. Dialogue returned!

I have the same problem and found this answer on Reddit. Now looking for where to change settings to stereo. "The initial 'conversation' between the app and the Chromecast is basically "hey Chromecast, what do you support for audio?" , the Chromecast...