It's the LSL6 audblast.drv that doesn't work (is it a known issue with DOSBox or something?).
At any rate, the other audio drivers work, so it doesn't seem like this is actually a real problem. I can understand the need for different MIDI drivers working, since the instruments sound different. But for the audio drivers, isn't one as good as another?
[edit:] Oh, but it looks like the other drivers only support 8-bit sound?