Inside the zip, you will typically find dl-1425.bin . This is the data dump of the internal ROM for the QSound Digital Signal Processor (DSP). Why You Need It
Because these files contain copyrighted code from Capcom, they are not bundled with the MAME executable. They must be sourced from reputable ROM archives: The Internet Archive qsound-hle.zip rom
It is impossible to discuss ROMs without addressing the elephant in the room: legality. Inside the zip, you will typically find dl-1425
Download at your own risk. While no individual has ever been sued for possessing qsound-hle.zip , it exists in a legally ambiguous space. Use it only if you own the original arcade hardware or are operating within fair use for preservation. They must be sourced from reputable ROM archives:
If you download a ROM pack for Street Fighter II and try to run it in FinalBurn Neo (FBNeo) or MAME, the emulator performs a checksum verification. It looks at the game’s code and sees a call to the QSound processor. Without the HLE driver, the emulator throws an error.