Logic Pro Forums | Logic Pro Help Online. Logic Users Group | Logic Related Links. Logic QuickTips. Google. How to combine multiple audio interfaces by creating an aggregate device on Mac OS X v10.5 Leopard. Languages By creating an aggregate device, you can use more than one audio interface at the same time with audio applications like Logic, Soundtrack Pro, GarageBand, or most other Core Audio-compliant applications. This article has been archived and is no longer updated by Apple. Set up an Aggregate Device Open the AudioMIDI Setup application from /Applications/Utilities. Choose Open Aggregate Device Editor from the Audio menu. Click the "+" button under the Aggregate Devices list to create a new empty device. To rename the device, select the name and type in the highlighted area. All connected audio interfaces appear in the Structure area. Designate one of the audio devices as the clock master by selecting its radio button in the Clock column.
Using your aggregate device with Apple professional audio software Read on to learn how to use an aggregate device with Logic, Soundtrack Pro, and GarageBand. To use an aggregate device with Logic or GarageBand: Open Logic Pro or Logic Express.