An audio router is a device that transports audio signals from inputs to outputs.
Inputs and Outputs The number of inputs and outputs varies dramatically. The way routers are described is normally number of inputs by number of outputs e.g. 2×1, 256×256.
Signals The transported audio can be analog or digital. Digital audio usually is in the AES/EBU standard for broadcast use. Broadband routers can route more than one signal type e.g. analogue or more than one type of digital.
Crosspoints Because any of the inputs can be routed to any output, the internal arrangement of the router is arranged as a number of crosspoints which can be activated to pass the corresponding signal to the desired output.
Some Manufacturers of audio routers Lawo Datavideo Imagine Communications AEQ FOR-A Klotz Digital NVISION Panasonic Philips Ross Video Snell & Wilcox Sony Thomson Grass Valley Utah Scientific Matrix Switch Corporation
See also Video router Vision mixer