Sync classref with current source

classes/class_audiostreamplayer2d.rst

@@ -62,6 +62,10 @@ Member Variables
 
 - :ref:`float<class_float>` **max_distance** - Maximum distance from which audio is still hearable.
 
+  .. _class_AudioStreamPlayer2D_pitch_scale:
+
+- :ref:`float<class_float>` **pitch_scale**
+
   .. _class_AudioStreamPlayer2D_playing:
 
 - :ref:`bool<class_bool>` **playing** - If ``true`` audio is playing.