Since the game itself doesn't let you change music/sound effect volumes separately, you can't make Roland music louder or quieter compared to Roland sound effects. Soundblaster is used only for the digitized speech during the intro (and where else there is speech in the game, maybe in the ending?). If you are using Roland + Soundblaster combo for Ultima Underworld (the most best sounding combination), then all the sound effects, as well as music, is generated by Roland. If you are using Soundblaster for both music and sound effects, then I don't think there is a way to change the volume balance (as the game has no internal mixer). Ultima Underworld using Rolant CM-32L (Munt) for music + sound effects, and Soundblaster for sampled speech)?
NeroConiglio: Is there a way to lower the music volume without lowering the sound effects? Which game(s) are you talking about, and with what sound sources (e.g.