Roland AeroCaster Livestreaming System - Manual (Page 23)

Audio Operations
23
Stereo link function
You can link MIC 1 and MIC 2 to create a stereo (L/R) input.
1. Press the [USER] button to make it go dark.
2. Press the ASSIGNABLE DECK [3] (MIC 1/2 STEREO) button to turn stereo link on (the button lights up).
The MIC 1 and MIC 2 signals are panned to the left and right respectively.