Yes, Mac OS allows you to use multiple audio devices at once and use them as-if they were a single device. Through a process called Aggregation, inputs and outputs of the separate devices are combined and can be used simultaneously. For example, you can aggregate 2 ONE’s, effectively creating a device with 4 output channels.
Apogee supports device aggregation for a maximum of 2 devices only on Mac OSX 10.7 (Lion) or greater.
Apogee devices that support Aggregation:
- Duet 2
To create an aggregate device and use multiple interfaces simultaneously:
- Open Audio Midi Setup (Located in Applications/Utilities/ on your Mac)
- Click the + from the button left of the window
- Select “Create Aggregate device”
- Double-click the newly created device’s name “Aggregate Device” and rename it if desired
- In the right side of the window, select the devices you wish to aggregate. For example ONE, Built-in Input, Built-in Output.
- For best results, be sure Apogee device is selected as the Master Clock
- In your recording application, select the device name you’ve just created.
- To select this device to be your default for Mac sound, Right click (or control click) the device in Audio MIDI Setup and select “Use this device for sound input/output”
- Select the Output speaker channels by clicking “Configure Speakers”, selecting the stereo tab and assigning destinations for left and right channels
- Select “Done” button and you’re all set.