I am having trouble getting sound working on Halloween Harry (Alien Carnage) - freeware edition.

I figured I may need to have IO at 220 and IRQ at 7 and DMA at 1.

Per 3DRealms I was correct, except IRQ can be at either 5 or 7.
http://legacy.3drealms.com/tech/aliencarnage.html

With a Tropez+, the game loads but then hangs when I tell it to start a new game.

With a Sound Blaster Pro (dual OPL2), it hangs when trying to load the game.

I've tried both IRQ 5 and 7. No difference.

Should I try a different card? I don't see why this game in particular is having an issue when none of the other games I have tested on that system have issues with sound.