System Sound Replacer [ROOT] description

[REQUIRES A ROOTED DEVICE]

System Sound Replacer lets you replace System UI sounds with a file of your choosing. The original file is backed up as /system/media/audio/ui/sound.bak so it can be restored within the app. Since this app must write to the system partition, it requires a rooted device.

This app is open-source, you can view the source code here:
https://github.com/steevp/SystemSoundReplacer