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Hi all, I'm unapologetically resurrecting this ancient thread here because I've watched and read a zillion tutorials and am still having one hiccup: When I select the drop-down menu under I/O assignments, "Output 1-2" is my only option. Every tutorial I've seen shows screenshots where Output 3-4, 5-6, 7-8 and so on are all options, and I can't figure out how to get those to appear. For context, I am trying to send audio to my computer's built-in output (headphone jack) and my Focusrite Scarlett Solo interface simultaneously. The goal is to be able to play music on Instagram live, sending direct audio to my phone through the headphone jack, while still being able to hear it myself via the interface. I'm not even trying to do a different mix with sends and all; I want the same exact thing going (mirroring?) to two different outputs simultaneously. (EDIT : This YouTube video saved me; I needed to go into Audio MIDI Setup and create an aggregate device: )