I found out in a manual, that with particular(STARCON2 /s:Internal) key I can force game to use PC Speaker, as a sound device. I tried both in dosbox and Windows with no luck, does anybody know if it's working?
This game heavily tweaks the pc speaker to play some decent digitzed music/sound, there is little to no chance it will work correctly on a modern pc. The small, cheap, barely existent speaker and the modern cpu and os really screw things up for the tweaking which was designed for older 286/386 dos systems with a real speaker.. DosBox usually emulates tweaked modes, I don't know why that isn't working (doesn't work for me either in PC speaker mode). Could just be DosBox's emulation isn't 100% accurate enough for this game or there's some config setting wrong.
If it has to be activated with a command line argument, it's likely that the DOSBox developers don't even know about it. Maybe you should ask in their forums about it.
I tried it myself and could only get some clicking noises