I picked up an iPad Air WiFi+Cellular about a month ago. The system sounds don't seem to work. I can select them in 'Settings'.. But I never hear them. (Even with the volume set to max).. In 'Settings', I have sent mail set to 'swoosh', new mail set to 'ding' and reminder alerts set to 'chord', but nothing ever comes from the speakers when these events occur. They did work in my previous iPad. All the other sounds work. I can play music, watch movies ect. with no problems.... Is this normal, or shoujld I go back to the Apple store for repairs?