This is my first question on here so please don't destroy me, i would like to enable a logging off sound when turning off or restarting Ubuntu, i have some custom sounds installed and have managed to get system ready and logging ON to work, however all questions i have looked for regarding this are over 6 years old and don't actually address what I'm trying to do. I have a few different .ogg files and have basically deleted the old ones and pasted in the new.
Thanks.