If don’t like the key tone when using the Samsung Keypad of your Samsung Galaxy Tab and is having hard time finding how to disable it, this post will give you a little help.
If you try to disable the key tone through the Samsung Keypad settings, you will notice there is no such option.
The option is hidden in the Sound settings.
Look under the Feedback section and you will notice that Audible touch tones is enable.
Uncheck the Audible touch tones and that will disable the keypad tone.
Now you have a silent Samsung Keypad.
However, do note that disabling the key tone for DioPen Chinese IME is through the DioPen Chinese IME Settings.