The digital audio processor ZES-22 is a Digital Audio Matrix that offers advanced features for any type of audio installation. The ZES-22 is a piece of flexible equipment with 4 balanced audio ports that can be configured as inputs or outputs according to the needs of the installation: (2×2), (4×0) or (0x4). The ZES-22 has digital audio input by Ethernet including a redundant Ethernet interface, which offers the possibility to design distributed audio systems. This digital audio matrix allows optical fibre adapters for sending and receiving data over large distances.