hey trying to play Shadow Warrior Classic Complete through GoG for the first time, I downloaded a port called SWP but the audio is fucking awful. It's all slow and warped sounding. I'm assuming it's probably the framerate affecting it.

Is there a better port out there or is there a setting I need to turn off/on? I remember I used Eduke way back when I played that, should I just use that?

Never had an issue with the sound personally, so I can't be of any use there but in terms of source ports the options available aren't as extensive as those for the likes of Doom/etc. You essentially have three options - SWP, JonoFsw and, failing either of those being to your liking, Classic Redux. Each of them has their faults and upsides, so in terms of "better" I guess it just boils down to personal preference.

There's been talk of a EDuke32-based port but it's not a huge priority by those who've talked about it and when (or if) it ever fully materializes is very much up to how much time they have to devote to it.

To fix the sound issues you must set the compatibility to Windows 7.