Trust me, I would love to implement this as well. Unfortunately, those sounds are directly attached to the knob/button animations in the cockpit, and not the events that drive them. There are ways of doing this using B:Vars, (which are not available in all binding software), and other more complicated home-grown methods, but this is one of those features that would add an enormous amount of work to support across all my aircraft. If an easier solution ever comes up, I will be sure to implement it across the whole fleet, but it's not something that's feasible for a nearby update.
