The NEXUS MADI Format (XMF) board connects to the MADI serial in­ter­face (Multichannel Audio Digital Interface). It includes a MADI port pro­viding 64 inputs and 64 outputs in just 4 width units. The board is used, for example, to connect multichannel audio re­cord­ers or external mixing consoles. The duplex board features BNC ports (75ohm, coaxial) and optical ports (LC, 1.300nm, 62.5/125µm). The optical ports employ the SFP system which supports a variety of optical-port modules. Both electric and optical interface-port types are available. The out­put signals are generated in optical and electrical formats si­mul­ta­neous­ly. The desired input is selected either manually, using the NEXUS op­er­at­ing software, or automatically. The BNC input and output ports are galvanically isolated from the sys­tem. (This feature exceeds the MADI standard.). The XMF board receives audio on up to 64 input channels. This allows for transferring 64 channels from one RMF/XMF to another using just a single MADI port. The number of input channels is detected automatically.