After updating my iPad2 to iOs7.1.2, I have sound problems with some applications

If you lost sounds for keyboard clicks, games or other apps, email notifications and other notifications, system sounds may have been muted.

System sounds can be muted and controlled two different ways. The screen lock rotation can be controlled in the same manner as well.

Settings>General>Use Side Switch to: Mute System sounds. If this option is selected, the switch on the side of the iPad above the volume rocker will mute system sounds.

If you choose Lock Screen Rotation, then the switch locks the screen. If the screen is locked, you will see a lock icon in the upper right corner next to the battery indicator gauge.

If you have the side switch set to lock screen rotation then the system sound control is in the control center if you are running iOS 7. Swipe up from the bottom of the screen to get to control center . Tap on the bell icon and system sounds will return.

If you are running iOS 5 or iOS 6, the system sound control is in the task bar at the bottom. Double tap the home button and swipe all the way to the right in the task bar to get to the speaker icon on the left side. Tap on that and the sounds will return.

If you have the side switch set to mute system sounds, then the screen lock can be accessed in the same manner as described above.

This support article from Apple explains how the side switch works.

http://support.apple.com/kb/HT4085

Check to see if your have notifications muted - that can mute sounds in some apps as well as notifications, but apps such as Music and Videos apps and headphones aren't affected.

Depending on what you've got Settings > General > Use Side Switch To set to (mute or rotation lock), then you can mute notifications by the switch on the right hand side of the iPad above the volume switch, or via control centre : swipe up from the bottom edge of the screen and it's the right-most of the 5 icons in the middle of it (if the icon is white then it's 'on', tap it to turn it grey and 'off'). The function that isn't on the side switch is set via control centre instead : http://support.apple.com/kb/HT4085

Try this - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.) http://support.apple.com/kb/ht1430

Check your settings. The iPads have a small switch on the right edge. It can be used as a rotation lock to keep the screen from automatically reorienting itself as you move around, but you need to have the tablet’s settings configured properly. That same switch, right above the volume buttons, can also be set to function instead as a mute button to silence certain types of audio.

If the switch is set to work as a mute button, you can change its purpose to “screen-rotation lock” by tapping the Settings icon on the home screen. On the Settings screen, tap General on the left side, and on the right side of the screen flick down to “Use Side Switch to.” Tap to select Lock Rotation or Mute to set the button’s function. Even if you set the side switch for your preferred use, you can still mute the Mini or lock the screen. Just double-click the Home button, and when the panel of apps appears along the bottom edge of the screen, flick the row from left to right with your finger. Tap the icon on the far left side of the row to either lock the iPad’s screen or mute the iPad’s alerts, notifications and sound effects. Music, podcasts and video are not muted unless you turn the volume all the way down.

iPhone: No sound or distorted sound from speaker

http://support.apple.com/kb/ts5180

iPhone: Can’t hear through the receiver or speakers

http://support.apple.com/kb/ts1630

http://www.atreks.com/app-no-sound-on-ipad-4-%E2%80%93-what-to-do/

To solve some sound problems, just follow these simple steps

1. Go to Settings

2. Tap on General

3. Tap on Reset

4. Tap on Reset All Settings

What this effectively does is to reset some of your Settings to factory default. It’s not a complete removal of settings. It removes all of your preferences for Wi-Fi, Bluetooth, Do No Disturb, Notifications, General, Sounds, Brightness & Wallpaper and Privacy. It doesn’t affect your data. All of your email accounts will remain intact, as well as any SMS text or iMessages.

 Cheers, Tom 😉