What is the RS232 command for switching audio from an input to an output port?

All RS-232 commands can be found in theUser Manual starting on page 140

For instance, if you need to switch audio signal from input 1 to 2 at output 5, type sw i02 o05 audio and hit Enter key or just send out the command.
Note: This command only works on the I/O boards with stereo audio because HDMI interface binds the video and audio signals together.