@408
Not sure about the volume announcements (does not occur on my devices), but the Screen Reader under
"Accessibility" will announce channel changes and might be your culprit.
Settings/Accessibility/Screen Reader [Off]
You can toggle this on/off by pressing the asterick (*) button on your Roku remote (or mobile app) 4 times.
You can disable this shortcut ability under Settings/Accessibility/Shortcut [Off] <-- this will disable the 4x asterick shortcut/toggle so you can't inadvertently trigger it again.
https://support.roku.com/article/231584647
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, 4802, 4850, Premiere+ 3921, Express 4k+ 3941, Streambar 9102
