I also used Dosbox to run Dune, and I didn't get any sound either.
Could it be that the sound files are missing? I don't have the game here, so I can't check. But it happens often -even for games that are small by today's standards- that the sound files were left out when people copied the game, to save space.
Just a guess though...
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A sickened, sensitive shadow writhing in hands that are not hands, and whirled blindly past ghastly midnights of rotting creation (Nyarlathotep, H.P. Lovecraft)
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