This is the problem: Wave output crackles in Space Quest 4 CD version in DOSBox (though midi is fine).

Here are the things I've tried:
Switching sound emulation from sb16 to sb1, sbpro, etc.
Switching IRQ and DMA settings
Using the audblast.drv from SQ5 as I've read somewhere in these forums
Setting the game to use Disney Sound Source, which doesn't result in crackling, but instead in wave output being pitched down
Using VDMSound instead of DOSBox, with which I get "cannot initialize audio hardware" at the start of the game

Searching through the forums here, I've read about problems people have had with getting this game to run, but not my particular problem. Does anyone have any ideas how I could get sound to work properly with this game? Thanks in advance.