Recording overbridge and mic at the same time

Hi! I have scarlett solo interface, and I wish to record microphone and digitakt live at the same time. I was about to upgrade to scarlett with two inputs, but I am not sure if it still is possible? I am using Reaper, and I believe you can’t have two drivers working at the same time? Any ideas what I would need? One option is recording audio, but then I would need at least three inputs on my interface and I gotta say I love the overbridge…