Not the Pro, I'm afraid. It's not exactly a powerhouse, but it manages to run vanilla Morrowind. Perfect for some on-the-fly gaming. I mainly use it to run StaffPad, though.
Something like the StaffPad app on Surface? You should check out the Surface Pro 3 if you aren't against the idea of being in the Windows ecosystem. Or wait and see what Microsoft have in store for the Surface Pro 4.
The cheap $1 styluses are not very accurate. They're like drawing with a child's pinkie finger.
As a musician, have you seen StaffPad? http://www.staffpad.net I'm hoping they port that to the iPad Pro. It is pretty incredible.
You know you can just hide a post that bothers you?
For writing music StaffPad for Surface is pretty great.
If you just want to mess around with sounds the Figure app from Propellerhead is free and pretty good too.
I have Live 9 Suite on my Surface Pro 2 and I think it's an amazing combination. I use it both with an RME Babyface, or stand alone with adios4all.
While Lives interface isn't 100% touch friendly, increasing the scaling to > 120% and using the pen can get you pretty far.
To go full touch, get Emulator Pro software and make your own midi interfaces to control Ableton and your VSTs.
https://smithsonmartin.com/products/emulator-pro/
And definitely check out Staffpad notation software for Surface:
Last night I wrote a couple of string quartet parts with the pen in Staffpad, exported the midi files into Live, popped on Lives string instruments, loaded up a few instances of Diva for synth pads and leads, dragged in a few beats, and had a highly organic track going in a matter of minutes. It's an excellent combination.