Depending on the application, sound transport can require between 20 kBps (Bytes) and 200 kBps.

With NX 3.5.0, sound is transmitted using the raw WAV format, a common format accepted by both the ARTSD and ESD sound daemons, but rather "heavy" to be transmitted over the network.

With NoMachine 4, multimedia relies on a completely new subsystem which allows seamless integration with the media framework on the system. It provides also audio and video streaming optimization.