Type: Object sound pointer, normal
Purpose: Drives EDF ambience effects controlled by the EEAmbience object. This pointer expects to find the EDF ambience sequence index number in the args field of the thing. If that number is invalid, this codepointer does nothing. It also utilizes the counter #0 field of the object as a ticker. In order to work properly, this codepointer must be called once every gametic (ie, in a frame of duration 1).