Option-click any track header, choose Configure Track Header, then select Record Enable to add the record enable button to each track header. If you want to use multiple headphones, you'll need a splitter or a headphone amplifier to send Garageband audio to those headphones.Ĭlick the Input Device pop-up menu, then choose the Aggregate Device.Ĭreate several new audio tracks in your GarageBand project. GarageBand can only output audio to a single device. To set the inputs and outputs for your recording, choose GarageBand > Settings (or Preferences) > Audio/MIDI, then do the following:Ĭlick the Output Device pop-up menu, then choose the device your headphones are connected to. You can record multiple tracks at once with an Aggregate device in GarageBand, such as a podcast with multiple USB mics: Record multiple tracks at once with an Aggregate Device in GarageBand on Mac In MainStage, you must manually select the input device. Logic Pro and GarageBand automatically set the input device to the match the selected output device, which you can change if you want to use a different input device. Use an Aggregate Device with Apple music creation softwareĭo the following depending on the application you're using:įor Logic Pro, choose Logic Pro > Settings (or Preferences) > Audio, then select Devices.įor GarageBand, choose GarageBand > Settings (or Preferences) > Audio/MIDI.įor MainStage, choose MainStage > Settings (or Preferences) > Audio.Ĭhoose the Aggregate Device from the Output Device pop-up menu in Logic Pro or Garageband, or the Audio Output pop-up menu in MainStage. Those corresponding channel numbers appear in the input and output slots of the app you're using.įor example, in Logic Pro, if you want to use the MacBook Pro microphone and it's assigned as channel one in Audio MIDI Setup, choose Input 1 from the input slot of the channel strip you're using to record. In Audio MIDI Setup, each subdevice at the top of the Subdevice section is color coded and matches the input and output channel numbers below the subdevices. Keep the Audio MIDI setup window open so you can refer to it when choosing inputs and outputs in the app you're using. Choose the device with the most reliable clock.įor each device that is not the clock source, select Drift Correction. To set the clock source for the Aggregate Device, choose the device from the Clock Source menu. Drag a device to the left for lower input or output numbers, or drag to the right for higher numbers. To reorder devices after you've selected them, drag a device under Subdevices left or right. Learn more about how to identify Aggregate Device inputs and outputs The order in which you check the boxes determines the order of the inputs and outputs in applications like Logic Pro and MainStage. With the new Aggregate Device selected in the sidebar, select the Use checkbox for each device you want to include as a subdevice in the Aggregate Device. When you create an Aggregate Device, make sure all external audio interfaces are connected to your Mac.įrom the Finder, choose Go > Utilities, then open the Audio MIDI Setup application.Ĭlick the Add (+) button at the bottom of the sidebar of the Audio Devices window, then chose Create Aggregate Device.Ī new Aggregate Device appears in the list on the left side of the window. But you still might want to use an Aggregate Device to increase the number of audio inputs or outputs. With Apple apps like Logic Pro, GarageBand, and MainStage, you can use separate devices for input and output. With some apps not made by Apple, you can use separate devices for input and output only when combined together as an Aggregate Device. You can also use an Aggregate Device if your app doesn't support using separate devices for input and output. It also lets you use multiple audio devices at the same time, like several USB microphones. This lets you increase the number audio inputs and outputs available at the same time. When you create an Aggregate Device, multiple devices appear as a single device in an app. With an Aggregate Device, you can use audio inputs and outputs from different devices at the same time with Logic Pro, GarageBand, MainStage, and most other Core Audio-compliant applications. Create an Aggregate Device to combine multiple audio devices
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