Please note that this tutorial was written for Logic Pro 9 and although the basic principles are likely to remain the same for future updates, some of the screenshots may not exactly match up with what you see in future versions.

To use an aggregate device within Logic Pro:

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An aggregate audio device allows you to combine multiple interfaces and access them as one unit. So, for example, if you have one interface with 2 inputs and 2 outputs and another with 4 inputs and 2 outputs, you can set them up as an aggregate device so that your …