MAME treats the QSound chip as a separate "device" rather than a component baked directly into individual game ROMs.
The file refers to a high-level emulation (HLE) BIOS replacement for QSound, the audio system used by Capcom’s CPS-1, CPS-2, and CPS-3 arcade hardware in MAME.
Developed in the late 1980s by QSound Labs, is a proprietary 3D audio processing technology. It allowed stereo speakers to produce a multi-dimensional, virtual surround sound field.