profwacko
I have already been putting this off until i finish up a major album project I'm almost done with.
Don't even think about upgrading unless you're done with any important projects. And even if you are....
You list an M-Audio Fast Track Ultra as your interface. You don't see many M-Audio interfaces in people's sigs anymore. Few people are buying the newer ones (poor-ish quality), and the older ones are not supported under Win 10.
Bottom line, if your Fast Track Ultra is working fine with Win 8.1, then consider yourself lucky and stay with what you're using. (FWIW, I'm still on Win 8.1 because it's rock-solid -- in fact, it may be the most rock-solid OS I've ever had the pleasure to use. Additionally, a week doesn't goes by that I don't see a post from someone upset that a Win 10 update has messed up their PC. I'll keep my outdated, stable system, thank you very much!).