Most PCI-era and later motherboards dropped proper legacy DOS audio entirely — no ISA bus, no real Sound Blaster compatibility, just silence in old games. SBEMU (by GitHub user crazii) fixes that in software.
What it is
SBEMU is a DOS TSR that emulates a Sound Blaster card and AdLib FM synth, using whatever real audio hardware is actually present as the output path. It supports a specific set of chipsets: Intel ICH southbridge audio, VIA VT82C686/VT8233, nForce, Intel HD Audio, and PCI cards like the Sound Blaster Live! and Audigy. Point it at one of those, and DOS games get genuine Sound Blaster-compatible digital audio and AdLib-compatible FM music, with no real ISA Sound Blaster in the machine at all.
Why it matters
I got it running on a Core i7 PC — hardware with no legacy DOS audio path whatsoever — and had Doom running with FM audio, and Duke Nukem 3D with full digital sound, natively in DOS. Not an emulator, not DOSBox: real DOS, real games, sound working on a machine that should have been completely silent.
It also gives later PCI sound cards a second life. A Sound Blaster Live! has a shaky story under native DOS on its own, but as an SBEMU output target it becomes genuinely useful there.
Setting it up
Getting it onto a bootable USB stick and configured is straightforward but has a couple of specific steps — see How To Install SBEMU on a Bootable USB Stick for the full walkthrough.
