Is there an audio chat equivalent of this? When I'm playing networked games with my kids from separate rooms, we often have to resort to overkill utilities like Whatsapp / Discord / etc.
Teamspeak (or ventrilo) used to be the way to go when I was into online multiplayer games (~10 years ago). Not in browser, but low latency and extremely low resource requirements (definitely less than one browser tab; we have tried Skype back then as well, but it was using too much recorded for the computers we had back then, especially if there was more than 2 people on the call). You could host teamspeak server yourself on your local LAN. Not sure if there is some easy discovery mechanism or you would need to know the local IP (and ideally set up static DHCP for the "server").
I imagine WebRTC might require some sort of server as well, so I don't think you can get something purely in browser on all machines, but if you learn about anything let me know!
It includes video as well but jitsi.meet works quite well. A dedicated audio chat server like Mumble/Murmur will probably beat any such solution in performance though.
Thanks for the tip. It works but it looks very heavy on the CPU. My fans started spinning not long after I opened the site (2014 MBP / Chrome)
What I would like is a dead-simple app equivalent to a walkie talkie. Self-hosted would be even better, in case we are using local wlan with no internet access.
I found tons of tutorials on how to create a WebRTC application, but strangely no ready-to-use solution.