LDAS – interesting new software for low-latensy streaming of audio over ip networks being developed at NTNU in Trondheim.
Here’s the initial announcement:

LDAS (Low Delay Audio Streamer) is software for full-duplex
low-latency transmission of audio over IP. This is the first public

At this point, the basic functionality is present — LDAS is capable
of transmitting full duplex two-channel audio between two computers.
This has been tested using the ldas_mate binary running on two
computers equipped with SoundBlaster Live sound cards.

(Note however that the software is still in an early state. Features
are lacking, and the code is somewhat fragile.)