HLE is fast and lightweight . It was a lifesaver for older PCs and handhelds. However, HLE is less accurate. Sometimes the echo is wrong, or a sound effect cuts off too early. Modern MAME defaults to LLE for accuracy, but older builds or specific forks might use HLE.
The phrase refers to the implementation of High-Level Emulation for QSound audio within the MAME framework, allowing the emulator to read game data from .zip archives and output faithful arcade audio without the heavy processing cost of simulating the original sound chip cycle-by-cycle. qsoundhlezip mame
If you are using a ROM manager like Clrmamepro or checking a database like Arcade Database , they will identify this file as a "shared device" rather than a standalone game. HLE is fast and lightweight