Seeker So... OBS is doing the audio recording now, and I don't need to run Audition if I'm using OBS with my audio going into it as a source?
Correct. You don't need to run any other audio recording software if audio is fed directly to OBS as you are doing now.
Seeker Is OBS doing any automatic gain setting? I couldn't find a place to change that in the settings, but... maybe.
Under the Mic/Aux level meter in OBS, there is a volume slider. That's the only gain control in OBS. There is no ability to set gain automatically. To avoid clipping you need to a test recording that include the loudest sound you will ever play, and lower the gain somewhere along the audio signal chain to ensure no clipping. I'd keep the volume slide in OBS at max (right most), and lower the gain on your RME interface to achieve lowest noise floor.
Seeker A full screen view native to my monitor for 1080p is 1920 x 1080.
Clearly I'm not getting that with the cameras at this point.
I Want to stack the view of the keyboard, that would be the Olympus underneath the side/traditional view from the Canon. You can see how that looks now at 14 seconds into the video.
I don't know how to make that work.
If I understand you correctly, the problem is both of your video sources are 16:9 aspect ratio. Therefore, to make a composite of both not only make each view smaller, but all inevitably leave some black bars on each side. There are several ways to deal with this. None is perfect, though.
First is crop your video frames in a way that the two combined together fully (or almost fully) occupy the entire 1920x1080 frame. The keyboard shortcut to crop a shot in OBS Studio is to hold down the Alt key on Windows or Option key on a Mac, then click and drag one of the dots on the box. I like a top-down view on the keyboard, which makes a long and narrow strip that sits at the bottom of the frame. That leave a wide rectangle on the top - allowing me to show a 3/4 angle view without my face, just what I wanted. Alternatively, you can put a camera on one end of the keyboard making a vertical strip of the keys, and place that frame on one side, leaving the rest more like a 4:3 ratio area for your main shot. You can also do a picture-in-picture (inset). Look at what other people do on YouTube and get creative.
Second is to leave some of the black bars on left/right side, but place some kind of background image so that it does not look too bare. I've seen people make a severely blurred copy of the main video as background, too. But I don't know if that's easy to do in OBS natively. It's certainly doable in Adobe Premiere.
Third is to change the aspect ratio of your video from the standard 1920x1080 to some other custom ratio that fits the composite of you two video streams. I generally would avoid this unless the majority of your audience is expected to watch it on a certain screen type (e.g. on a phone held vertically).
