I was pondering the ability of Windows 3.11 (the last great version!) to support a sound card based on the Crystal CS-4231A. I found the WSS 2.0 MS disks on Vetusware.

BUT... we all know M$ never did nothing for free... Did M$ ever do a WSS SDK, tech manuel, or reference? This is for a micro channel sound card (Ultimedia Audio) that does work under NT4, but maybe we can regress it... Card might not have much for synth, as it does not appear to have any OPL on it...

http://ps-2.kev009.com/ohlandl/sound/rs6000_7-6.html

And yes, we do have a working ADF for it. May not be what someone with the 7-6 Tech Ref would whip up, but I have installed it under NT4 and it does work...