DOS ain't dead

In thread about Wengier's port of DOSBox-X I wrote that I see only 0D exception in DosBox-X when a SB emulation driver for SBLive! is loaded.

He answered that it must be some incopatibility between HXDOS and this emulation.

It might be partialy true - however: the TESTMIDI and PLAYWAVE examples from HXDOS\TEST\ work perfectly but the SDLAUDIO ends with the same error message like DosBox-X: here.

Also - I reported that Fallout 2 works (except the mouse response) and it works with audio (So I can hear the same "War... War never changes...")
Apparently, Fallout 2 is not based on SDL.

So the question is: When HXDOS _IS_ compatible with SBLive! emulation, what ugly happens when the SDL layer is used?

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DOS-u-akbar!