It is as simple as selecting the item(s) and then click on "Nullify". Restoration is available as well should the users want to revert the process.
Use case: power on sound effect, PowerOn.ogg (Different phone manufacturer may use different filename)
Behind the ScenesHow Nullification Works:(1) Rename the file (become a backup)(2) Create an empty file with the same name(3) Grant the same permission(4) Done
How Restoration Works:(1) Delete the 0 byte empty file(2) Rename the backup file(3) Done
* Requires root access as this app is access /system/
Warning: If the system sound is required by law in your countries, you shouldn't use this tool to disable them.