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1. Connect the device by USB cable to your computer, and then open the “Audio MIDI Setup” Utility in OSX.   
   
   
2. Click the “add” icon in the lower left corner and select “Aggregate Device”. 
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3. In the options screen tick “Use” next to the USB Audio Interface. Right click the Device and select “Configure Speakers”. Here you are going to assign channels 1 to “left" and 2 to “right”. 
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4. Repeat the above steps, until you have enough channels for your project.
   
   

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