Sound Input from Mixer
If you are trying to capture sound from the mixer, open the AJA Control Panel.
Make the Audio Input = Analog on the Input Select controls.
Co to the Sound control panel and make the input come from the AJA Device.
The output goes to Line Output which goes to the headphones. If you want to hear it through the speakers, there is a stereo plug coming off the back of the subwoofer that you can plug into the line out jack.