Weird, my copy doesn't have an option of Gravis for music - just sound. I tried with sound and it works fine - I just don't have any stereo.

1.3D supports Ultrasound, but it complains

"Ultrasound IRQ must be 7 or less."

Actually yeah I get that error in 0.65. In 0.70 it tries to play but you don't hear anything.

It doesn't complain, it crashes right before the main menu. This bug appeared in the latest CVS builds, used to work fine before.

Is it music or sound?

Music. GUS selected as soundcard works fine.

And could you give me the exact version of your Duke Nukem 3D.

1.3D

I would go with soundblaster. Gravis was not all that good.