R50 As Webcam - Internal Microphone

[himegs]

I am using an R50 as a webcam via the direct USB-C connection.  Can I use the built-in mic for this?  The levels are being displayed on the flip screen, so I know that it is working.  But no sound is being transmitted via the USB, because neither OBS nor the built-in Windows Camera app are registering any sound.  

I suppose another way of looking at this is simply to ask if the USB-C connection passes through audio, or is it only video?

[Stephen · Accepted solution]

No. The USB-C connection uses the UVC (USB Video Class) protocol, which only allows the transmission of video over the USB cable. You need to use a microphone connected to your computer for live audio. 

[himegs]

Thank you.  I really appreciate the fast response - you saved me from a lot more time spent tinkering.  I will mark this as solved. 

I'm still a little confused.  The Canon USA website shows that the camera supports UVC and UAC.  I believe your answer is correct, but that is confusing.

I think this would also answer a couple of other threads from people asking about using external microphones, since that audio would still have to go through the USB connection and it cannot.