That can work, but probably not very well. Without real-time resampling some buffer in the path will underrun or overrun depending on whether the recording soundcard is sampling slower or faster than the playback soundcard. The clocks are not synchronized.

I wörks!. I have microphone outside soundproof windows and it is very synchronized, within 200 milliseconds. Good enuff for movies methinks.

Correccion. It is actually 3 seconds via Wifi. Previous test was direct loopback in the same machine. Good for music and other non-synchronized activities anyways.

Correccíon #2: If you manage to start both the server and client at the same moment, it is indeed 200 ms.