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
This specialized "device ROM" is essential for modern arcade emulation. Without it, your emulator cannot simulate the proprietary sound hardware that made these games famous for their "Virtual Surround Sound." What is qsound-hle.zip? qsound-hle.zip rom