<Sunshine can duplicate sound?>

[hellcezar]

Greetings everyone!
Can Sunshine duplicate audio during a stream so that it plays on my TV while also being audible through my PC’s headphones?

[mcortezv]

Yes, it's possible, but it's not a built-in Sunshine feature.
What you need to do is duplicate the audio in Windows. Sunshine only accepts the audio sent by the system; it can't split it itself.
The easiest way is to use a program like Voicemeeter or a virtual audio cable, so the sound comes out simultaneously through the TV (HDMI) and your headphones.
You can also use "Stereo Mix" or the "Listen to this device" option, but this usually results in more latency or less stability.