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Tracktion 3
z Connect the VX to the computer and turn on the power.
z Press the U-CTRL button on VX once to set U-CTRL to U-CTRL A.
z Open Tracktion 3.
z Click on【Settings】menu.
z Click on【Control Surfaces】menu.
z Click on【Mackie Control Universal】under【Supported Control Surface】menu.
For【Input device】, select “USB Audio Device [2]”
For【Output device】, select “USB Audio Device [2]”
z Finished.