Can anyone else verify that sound is not properly working in the Lemmings prototype? In MAME v0.150 when you first load the game you'll hear the title screen music, but there are no sound effects when you insert a coin or start the game, and there is absolutely no sound once gameplay begins.
I tried running the same ROM in MAME v0.138 and all sound appeared to be working fine there. That's the previous version I ran, so that's the only version I tested with. I did notice that the whatsnew.txt for MAME v0.150 mentioned working on the driver for Lemmings, so I think whatever changed made here might have affected it. I've never posted on MAMETesters before so I don't have an account, and I figured I should probably get confirmation from someone else before attempting to post on there.