+==========-===============================================+ | Code | Description | |==========+===============================================| | 0000b | output port muted | | 0001b | connect audio channel 0 to this output port | | 0010b | connect audio channel 1 to this output port | | 0100b | connect audio channel 2 to this output port | | 1000b | connect audio channel 3 to this output port | +==========================================================+