@tandy1972
Hi,
We do not have the instructions to downgrade the camera's firmware. To locate the issue, please refer to the following steps to collect the video for further analysis.
1. Move the Tapo C210 V2 to the same place as the Tapo C210 V1.
2. Set the microphone volume to maximum on the camera's Live View page.
3. Record a video manually on the camera's Live View page, then send us the recorded video from Tapo C210 V2 and V1 for comparison.
You can upload the videos to your cloud server(such as Google Drive), generate a link to download them and send me(@Solla-topee) the link via a private message.
Note: we suggest removing the camera's MAC address on this thread.
Best Regards