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  | 
+==========================================================+