3Dfx Test for Prophecy... has odd requirements.

Origin FX is an Origin screensaver package... has some WC ones... only runs in Windows 3.
 
Starkey: WC4 had PCM-music. Sure, the quality wasn't the greatest, but it was PCM all the same. And the planet-side music/ambience in Privateer 2 sounded like PCM as well.

LOAF: ESS Maestro-2 works just fine. I don't know how perfect it is, but it's certainly adequate.