I have played with Voicemeter for this. You can stream the audio back and forth between machines. And one of them is always connected to the speakers. And you c

I have played with Voicemeter for this. You can stream the audio back and forth between machines. And one of them is always connected to the speakers. And you can mix between the two as well. https://www.vb-audio.com/Voicemeeter/vban.htm https://www.vb-audio.com/Voicemeeter/vban.htm