Yeah, well the thing is I've always been using creative solutions during 98-xp era and honestly speaking never had major issues with them (yeah, the drivers were problematic here and there and always bloated but overall a so-so experience). My first card was a SB Live! (gold digital something something) and maaan I loved it (yeah!). Back then I had a 4.1 speaker system (something from Creative too iirc) and the whole neighborhood was visiting my apartment and checking out games with 3d audio and eax effects, heh. After that it was an Audigy 2 ZS and 5.1 + games like PoP Sands of Time, some iteration of Rainbow Six, ut2 and splinter cell... Oh and Jedi Academy. I liked it all sooo much.
The interesting part is that back then I and my friends didn't even heard of a3d (we'd been seeing a3d option in game settings sometimes but nobody really knew what it is).
So naturally after reading on vogons for some time in the last year about Aureal and how mean Creative were to it and also how much superior the a3d was I decided that I must build a system with a3d 2.0 support. I bought the Aureal Vortex 2 and connected it to 4.0 speaker configuration (5.1 isn't possible). The system itself isn't bad: sony DA2400es multi-in -> 4x JBL Northbridge 80 ES floorstanders
Result: Aureal demos are impressive, especially wave tracing ones. Games are not. Unreal tries to imitate something interesting sometimes but 3d sound positioning mostly sucks (difficult to understand where the sound is coming from). Same with Soldier of Fortune. Thief is kinda ok when sounds in stereo (sound-from-behind-your-back emulation), but nothing spectacular when in quadraphonic (again positioning sucks). Also reverb sounds bit weird. Star Trek EF is a TOTAL MESS 🤣. It is totally borked in the sound hardware acceleration department, believe me 😁 (and that is bad because that game was the reason I built such a system).
Yeah and the drivers themselves are pretty unstable too. They do tend to crash windows. Sound also pops frome time to time (and no computer magic could mend that unfortunately). Also the .48 version has inverted frontal channels when using hardware acceleration and that's the only w98 version that does support reverb so yeeeah...
All in all a3d is interesting but it isn't something one could be blown away with. Especially compared to EAX. The wavetracing concept is noteworthy but I haven't seen any good implementation of it in games so far.