OK. Sound and music does not suit every circumstance. So it is reasonnable to turn them off.
But here are a few reasons why you should at least turn on sound effects (Fx).
1) you get notified (bell sound) when an online match starts. You can safely do something else while you wait for an opponent and you will not miss the start of the game.
2) You get notified (bell sound) when it is your turn to play and you don't have much time left. You will not lose the game because you played too slowly or because you mistakenly thought it was your opponent's turn.
3) You get notified when a friend logs in (whistle sound). Very convenient isn't it?
4) You get notified when a new message is posted in the inn chat or in a personal chat. You won't miss a message any more.
5) You get a little sound on active buttons. you see better what is active and what is not.
6) You get a sound when you click on a button. You then know that your action has been received by the browser.
To turn on sound effects, look at the top right of the menu page. Click on the little sound icon! Then the 3 sound settings will appear.
We also recommend to turn on atmosphere and music but they are less important. Atmosphere is for the menu page only whereas Music is for the games mostly (but is also played if you select a game via the green dice interface on the main menu)
PS: please note that because of technical limitations on those systems, Android machines can only play Sound effects (not atmosphere and music) while iOS machines cannot play any sound at all.