Audio options for C920?

[mcphillips]

-- AT3550 into Scarlett 2i2 with a loose-fitting 3.5mm to 1/4" plug adapter. Very weak can hardly hear it on the MP4.

You're probably going into a line input in the Scarlett, although I've never used one. At least make sure you have the input switch on Instrument instead of Line, although that's not the right solution.

I think the issue is the Logitech software. No matter how hot the signal into the computer, it just can't do anything with it.

I doubt it.