Once you have downloaded the "full" zip file, do not extract it unless you are troubleshooting specific files. MAME reads BIOS and device files directly in their compressed format.
Below is a comprehensive guide to understanding what this file is, why modern versions of MAME require it, and how to source it safely. What is QSound HLE? download qsoundhlezip full
If you use RetroArch (the frontend for libretro cores), the in-app will automatically download the complete qsoundhle.zip when you attempt to load a CPS-2 game. This is the safest method for end-users: Once you have downloaded the "full" zip file,