this post was submitted on 09 Feb 2026
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Voice chat works out of the box with Matrix.
It uses WebRTC and tries to do P2P connections. Note that this leaks your IP to the other caller and vice versa, but it's also quite fast as you can establish a direct connection.
If P2P fails it will try to fallback to your configured TURN server and use that one for relaying.
However not every instance has one (as TURN servers are usually not that modern and straight forward...) and if this is the case it will fallback to Matrix's global TURN servers.