In older versions of MAME, this sound chip was often "High-Level Emulated" (HLE), meaning the emulator simulated the sound without needing the original firmware. Newer versions of MAME require the actual internal code ( dl-1425.bin ) for more accurate sound reproduction. The Common Fix
: While HLE is "lighter" than LLE, 2021-era updates still require a reasonably modern CPU to maintain full-speed audio synchronization. dl1425bin qsoundhle 2021