After restarting your Mac, a dialog box will prompt you to choose Duet 2 for Mac sound input and output. Click Yes.
Connect to Headphones or Speakers
Connect headphones to the headphone output on the front of the unit. Connect the provided breakout cable to I/O Breakout Port on the rear of the unit. Then connect the 1/4” speaker outputs of the breakout cable to the inputs of your active (powered) studio monitors or amplifier.
Check Audio Playback in iTunes
To verify Duet 2’s output, open iTunes (found in your Mac’s Applications folder), choose a song, and click Play.
Adjusting Volume
To adjust the volume, press Duet 2’s Multi-function Controller Knob until the speaker or headphone icon is lit on the display’s Home View and turn the knob clockwise to increase the volume.
If you get a message warning about USB current draw, connect Duet 2 to the supplied Apogee AC Power Adapter. For more details about current draw on the USB bus, please see Current Draw.