Feature request for fog-of-war 1: castling sound

Currently when you castle in fog-of-war you heard a special castling sound and your opponent heard a general sound. It would be better if both player heard the same general sound, not castling sound. There are two problems with current behavior:

1. It is not intuitive. When a beginner heard a  castling sound he might think that his opponent knows that he castled. Moreover he would expect that he would hear when his opponent castle and may think that the opponent have not castle, because he did heard castling sound. 

2. When you play with your friend who are in the same room as you IRL, then your friend can hear when you castle. Usually when we play with friends in the same room one of us mute their sound. It make the game unfair: one player can hear the other castle, and the other player can not. 

The same is for promotion sound. So it would be nice if developers of fog-of-war disable the special castling and promotion sounds at all.  Capturing sound is OK, because both players knew whether the move was a capture.