How to stop the sound when Evolution reports mail has arrived

[Jonathan Ryshpan]

How can the sound generated when evolution reports the arrival to mail
to KDE be suppressed?
 * System Settings->Notifications : Shows no obvious way to suppress all
   sounds. I don't need sound from any application and am happy to
   suppress them all to get rid of the sounds from evolution.
 * System Settings->Notifications->Applications Configure->Evolution :
   Produces the message "This application does not support notifications
   on a per event basis" — I don't want to control notifications on a
   per event basis; I want to suppress sound for all events reported by
   Evolution.

-- 
Many Thanks - Jonathan Ryshpan <jonrysh(a)pacbell.net&gt; If God lived on
earth, people would break all his windows.