Putting the DSP on a separate core was only planned for the LLE plugin. Since it's so slow due to using low level emulation, it would of benefited from it's own dedicated core to draw processing power from. Since there is now working audio for Zelda/Mario games implemented into the HLE plugin it is now pointless, they even got audio working on the HLE plugin before the LLE plugin.
Since the HLE plugin is already quite fast, there isn't going to be any noticeable performance gain by placing it on a separate core, at most if you are lucky it might give a 1 - 2 FPS improvement.
Since the HLE plugin is already quite fast, there isn't going to be any noticeable performance gain by placing it on a separate core, at most if you are lucky it might give a 1 - 2 FPS improvement.