Alright, I think I've finally got something good. I think that, everytime you enable the speed limiter, it automatically syncs game to audio in Jabo's DirectSound, and everytime you disable the speed limiter, it automatically turns it off. This way, you don't have to disable the option to sync the game to the audio in the audio plugin configuration and THEN disable the speed limiter for it to take effect.
I am aware that, if this suggestion were applied, this could cause problems for games like TWINE 007. The moment you press that F4 key, you've just hanged the emulator, or at least until you press it again. That's why, I think Jabo's DirectSound should have an INI configuration file, telling the plugin which games are safe to do this sort of thing and which aren't. It would be easier to just configure only the games that aren't just to tell the plugin which games not to allow audio-synching, imo.
Doesn't accomplish much, but hey, saves a few seconds of the user's time.