@towardthesea 

Good day!

Thank you very much for your time and patience.

For your case, I might need to check with the engineers first and once there is any updated news,  I could come back as once.

By the way, would chaning another computer make any difference?

Thanks a lot for your understanding and support.

@TP-Link 

I tried some different computers, nothing changes.

Cheers,

Towardthesea

@towardthesea 

Thanks for your patience.

For your case, we would like to follow up on your case by email and please have a check of your email box later.

At the same, could you please also refer to this link to check if the audio stream has been forwarded to the VLC player;

https://recoverit.wondershare.com/video-repair/vlc-no-sound.html

Thank you very much.

@towardthesea 

Hi. I also have this issue with Tapo C200. Were you able to solve it?

@towardthesea 

@luismgc 

Hi all. Today I wanted to use VLC to view the camera via RTSP and I had the same problem.
In my case, the solution was to enter through the Android application and there increase the volume of the microphone (I had it at zero).
Apparently it is not a configuration that affects the app but the camera itself.
Greetings and I hope this solution will serve you ... if you still need it.