I use it with my focusrite scarlet (2i2 2nd gen) via asio on W11 and it works fine. Running it in windowed mode lets you set the resolution and put it anywhere on your screen you want.
There are lots of walkthroughs online on how you can set up asio. Modding it consists of replacing a single DLL and then adding your settings to a text file.
If you’ve got big boy audio gear, my assumption is that you’re not using RS for learning to play. It’s awesome for picking up new songs or just playing along with songs you love.
Check out customsforge.com for user created content.
It’s Ubisoft… of COURSE they were selling it in the worst possible state. XD
The community content makes it absolutely worth it, and I highly recommend it. Fair warning, it IS community created content. I’ve had to re-chart and submit updates to some of the song charts on there, but I also feel like that’s helped me become a better musician as well. Knowing the song well enough that I can tell when it’s wrong and then I get to use (ToneLib-Jam, for me personally) another piece of the toolkit to fix it and resubmit.