Dual PC Streaming and audio Setup
For the audio setup, you must set the capture card as the playback device on gaming PC so that the audio can be captured in the software on the streaming PC.
There are two ways to fix the gaming PC without an audio problem because the audio has been transmitted to the streaming one.
The first one, you can connect the HDMI from the HDMI out port on the capture card to your gaming monitor if the monitor has a built-in speaker.
You could see the below example:
The second one, you could follow the below vide:
Next, install a virtual audio software to duplicate the audio on your gaming PC, you can see the below video:
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