that guide suggest using "wave blaster on SB16"
but without any reasoning as to why. and I'm not entirely sure I understand what that does. it seems to just use your default GM synth set
Well it depends on your sound card. I believe almost all modern sound cards / chipsets support Sound Blaster specifications. It was and is widely used for games.
The Sound Blaster line of cards, together with the first inexpensive CD-ROM drives and evolving video technology, ushered in a new era of multimedia computer applications that could play back CD audio, add recorded dialogue to computer games, or even reproduce motion video (albeit at much lower resolutions and quality in early days). The widespread decision to support the Sound Blaster design in multimedia and entertainment titles meant that future sound cards such as Media Vision's Pro Audio Spectrum and the Gravis Ultrasound had to be Sound Blaster compatible if they were to sell well. Until the early 2000s (by which the AC'97 audio standard became more widespread and eventually usurped the SoundBlaster as a standard due to its low cost and integration into many motherboards), Sound Blaster compatibility is a standard that many other sound cards still support to maintain compatibility with many games and applications released.
More info here:
http://webcache.googleusercontent.com/search?q=cache:qNAPnbb_fUkJ:en.wikipedia.org/wiki/Sound_card+Modern+sound+cards+support+Sound+Blaster&cd=1&hl=en&ct=clnk&gl=usYou're right though, it depends on your sound card / built in audio. But most likely, you're using something more modern, but I could be wrong.
Maybe this helps to clarify a few things?
-- maybe not, but you seem to know more about sound configurations than me.