Slade3 soundfont question

This thread reminded me that I wanted to ask about soundfonts.

I have downloaded Slade3 as the binaries

and unzipped it in a folder of it's own, not in Program Files

I don't have the file libsndfile 

When I go into Preferences - Audio I see this

Now, without setting anything, the soundfile will play.

And if I select a soundfont the soundfile will play.

The soundfont setting will be reflected in slade.cfg.

But, if I select a different soundfont, any soundfont, the soundfile always sounds the same.

How can I set a specific soundfont so it will play the soundfile?

If your sound file plays even without setting a soundfont, that means it's not a MIDI (or similar) file. The sound is literally baked in the file, so external sound fonts are irrelevant; just like changing your palette will not change how a JPG displays.

Soundfonts will only matter for MIDI and MUS. Anything else - Ogg, MP3, FLAC, XM, IT, S3M, you name it - will play "naturally."

Unless you're me, it seems, since I can't make sounds play for shit. :)