Table 270

+==========-===============================================+
|   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  |
+==========================================================+