The SONIFEX PS-PLAY : IP TO AUDIO STREAMING DECODER takes an IP audio feed and converts it to a number of simultaneous stereo outputs: balanced and unbalanced analog audio, AES/EBU, S/PDIF, and TOSLINK digital audio outputs. The PS-PLAY can be configured with up to three sources. The sources are prioritized in number order. If one fails, the next one will attempt to play. If all fail, an external USB drive can be used as a backup source if you have one connected.