Greetings from the Roku Community, @Meanzine!
We understand you are having a problem with the Roku outdoor camera since when you captured an event recording, there was no sound playing on it. We're happy to help. If you are experiencing video and sound issues with your live stream or recordings, try updating the smart home app or check for firmware updates.
You may check out this support article here on how to fix a picture or sound issue with your Roku Smart Home camera or Video Doorbell.
Hope you'll find this useful and keep us posted if the problem still persists.
All the best,
John
John
Roku Community Moderator