How to turn off the sound of your keyboard

1. Open the Float Bar by short pressing the center button on your CTOUCH screen.

2. Click on Settings Menu (Gear symbol).

3. Click on General.

4. Click on Keyboards & Inputs.

5. Click on Android Keyboard (AOSP).

6. Click on Preferences.

7. Click on Sound on keypress to disable the sound.

You're done! Settings will be saved automatically.