First, can people please go to https://home.google.com - or use another
iOS/Android device - to see if audio is in fact being captured by the
Nest cameras? By default, that site has audio MUTED (icon on the lower
left of the image), so you'll have to...
I wouldn't go that far. Again, on Android, there are volume settings for
individual components - ringer, headset, media - PLUS the master volume.
Kind of like on Windows. You have to make sure media is not set to
low/off.