I use Daggerfall under Ubuntu Lucid. Maybe you are having a problem with SDL - Pulseaudio junkola.
You could try:
sudo apt-get install libsdl1.2debian-alsa
That's what I use, and it sounds ok to me.
Edit: for sound in my dosbox config file, I'm just using the defaults, I think, but I could post them if you want.
I tried that but still got the same issue.
Aliotroph
I have set those as well with no luck.
The sound is kind of halting with split sections that are sped up almost chipmunk style. The entire audio is also not synced correctly. It is delayed.
After searching online I saw a similar issue that was fixed by lowering the cpu cycles. And though this does seem to help a little, it is messes up about once or twice a second and the sync is still off.