The ADA8200 inputs and outputs are not directly connected - the inputs are routed to the ADAT output and the analogue outputs are routed to the ADAT input. The interface is intended for use in conjunction with interfaces with optical outputs (such as the UMC1820) for additional inputs within a DAW.

However, it is possible to use the interface in standalone mode by routing the analogue inputs to the analogue outputs. To do this, simply connect an optical cable from the ADAT out to the ADAT in.