Changes

** This state is controlled by the global parameter ''cabin_out'' (0 means inside, 1 means outside).

** This state is controlled by the global parameters ''wnd_left'', ''wnd_rigth''(0 means closed, 1 means opened).

* a1. The sound is processed as external generally with respect to the position of the listener. The result of processing is in the audio bus ['''Grp outside'''].* 2. Subsequently, this channel is redirected (divided) into three audio buses:** ['''Rtn window_out'''] Central sound overhang in the cab.** ['''Rtn window_left'''] Pass the sound through the left window.** ['''Rtn window_right'''] Pass the sound through the right window.* 3. Finally, all three buses are mixed into the resulting sound.