Does this guide work for Windows only? I was planning to play Betrayal at Krondor today and spotted this thread. However, I'm playing it on Steam Deck (I installed the GOG version using Lutris).

Given that the Steam Deck is Linux-based, I'm not sure the first step of this guide is going to work. Are Bassmidi and VirtualMIDISynth compatible with Windows only?

I'm kind of put off playing it now if it's going to be an inferior audio experience. :/

I just did this in Linux today. I don't have an exact step-by-step but in general.

1. Install Fluidsynth linux package
2. Install a soundfont for Fluidsynth to use. There are several free ones usually as packages.
2a. If you want to use Patch93's soundfont it comes as a sfpack
2b. You'll need to get the SFPACK utility from the archive.org and run it in wine to convert to an sf2 file
3. Configure and run/enable Fluidsynth as a service with desired soundfont
4. Download NewRisingSun's patch and replace frp.sx
5. Download Tikalat's patch and replace sx.ovl
6. Place KRONDOR.EXE and Tikalat's Sierra_patch.exe in the same folder and run the patcher in wine
7. Change soundDrv to GENMIDI.DRV in RESOURCE.CFG