"Supports HLE" makes no sense. HLE means High Level Emulation, and a handful of components in Dolphin uses that technique. If you're talking about HLE of the DSP specifically, it still does not make sense. The DSP in Dolphin has been using HLE in 3.5 and in 4.0+. The audio is just no longer asynchronous, for a good reason; it was buggy for a lot of.games.
I did testing on a 4200U recently myself on recent dev. builds. Even when the game can't emulate the DSP at 100%, audio quality is still good (or acceptable if you have high standards) due to timestretching
I did testing on a 4200U recently myself on recent dev. builds. Even when the game can't emulate the DSP at 100%, audio quality is still good (or acceptable if you have high standards) due to timestretching