<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.

[raxod502]

I arrived here because I was trying to figure out how to listen to my own audio through headphones, while also streaming the same audio. By default in Sunshine, as soon as a stream starts, the audio is streamed but is no longer output through the default audio device.

I got through all the steps of setting up a virtual audio device in PipeWire, before realizing that the sink-sunshine-stereo virtual audio device that Sunshine sets your audio output to, is apparently totally unrelated to the actual audio capturing for the stream. It only serves to blackhole the audio.

So, I literally just set the audio output back to my headphones in GNOME sound settings and voila, I was both streaming and listening at the same time, with no extra configuration needed.

Maybe it should have been obvious to me but I did not expect this behavior. After all, the video output is run to both stream and loopback by default, whereas that is not the case for audio.