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To create Aggregate Device and Multi-output Device:
1. Click Launchpad -> choose Other -> Open Audio MIDI Setup;
2. Then Audio Devices window pops up, and tap + on the bottom-left corner -> Choose Create Aggregate Device / Create Multi-output Device.
To delete Aggregate Device and Multi-output Device:
1. Click Launchpad -> choose Other -> Open Audio MIDI Setup;
2. Choose "Filmage Aggregate Device" and click "-" below;
3. Choose "Filmage Multi-Output Device" and click "-" below;
4. Once you delete "Filmage Aggregate Device" and "Filmage Multi-Output Device" in Audio MIDI Setup, the devices from Sound in System Preferences will be removed.