Icecast is not the answer. It is not designed for very low latency. You can trim the delays down to below 1 second, but it's not consistent across multiple clients. So if you have more than one player connected they will start drifting apart. For use cases like you imply them a constant (sometimes even adjustable) sub 100ms latency is key.
An approach more likely to succeed is VoIP software or network transparent audio servers like Jack or PulseAudio.
Icecast is not the answer. It is not designed for very low latency. You can trim the delays down to below 1 second, but it's not consistent across multiple clients. So if you have more than one player connected they will start drifting apart. For use cases like you imply them a constant (sometimes even adjustable) sub 100ms latency is key.
An approach more likely to succeed is VoIP software or network transparent audio servers like Jack or PulseAudio.