It would be nice if something like

class AbstractWave
{
    proto native void SetControllerVariable(string variableName, float value);
    proto native float GetControllerVariable(string variableName)
}

was added, so we can Set and Get variables that are only handled engine side.

Something like playTrigger we can not use with "scripted sound" controls because after the sound has been constructed by the builder, we can not set the variables like rpm / campos again.