iConnectivity AUDIO4c Desktop 4x6 USB Type-C Audio/MIDI Interface - Manual (Page 23)

Play USB2 Analog output page, [Stereo] selected
Stream
● USB1 mix to USB port 1 output 1-2.
● USB2 mix to USB port 2 output 1-2.
Input list for Stream mode:
USB 1 USB 2
1 USB port 1 : output 1 1 USB port 1 : output 1
2 USB port 1 : output 2 2 USB port 1 : output 2
3 USB port 2 : output 1 3 USB port 2 : output 1
4 USB port 2 : output 2 4 USB port 2 : output 2
5 Not used 5 Not used
6 Not used 6 Not used
7 Not used 7 Not used
8 Not used 8 Not used
AUDIO4c User Guide v2021-0002 Page 16