Now, that DOSBox 0.61 has just been released, in the new README file in the FAQ section I read this:
Q: What sound hardware does DosBox presently emulate?
...DosBox provides Soundblaster Pro level 8-bit stereo sound.
I never knew this before, although, I certainly noticed that the quality of the sound output definitely was NOT 16-bit. Well, I guess this is where the real problem lies. I think the next version should undoubtedly implement 16-bit stereo sound ASAP. I believe that what I proposed is probably unwieldy and impractical (especially because DOSBox currently does NOT emulate 16-bit stereo SoundBlaster Pro 2.0)
So, its most likely best to just incorporate 16-bit SB PRO 2.0, and defer what I have suggested; at least, until 16-bit emulation is available. I mean, maybe once DOSBox has 16-bit SB PRO 2.0 sound, those "acute differences" I mentioned between SB PRO/Adlib/FM/OPL2-3 clone and/or compatible devices might be only trivial, at best. Particularly, because I was writing from the perspective of a generic 16-bit SB PRO 2.0 & Adlib-compatible sound card.