I used to have a train crossing wav...for emergencies. Anymore I don't actually USE a wave file, i just type some letters into the box and it gives the standard computer tone.
I have audios for folks cheering me in the arena, TELLS, whisper charms, and if I am waiting for someone I will put it on their name so when they get there it starts ding-a-linging. (can't do audio highlights in the NAMES tab, have to use CUSTOM and write their name)
I also have a secret, case sensitive password my friends know so they can ring me with it.
"Hi, my name is Ososis and I'm blaming my shitty life for being such a fragile, soy drinking, emotionally unstable loser. My triggers are: Red reputation, ANY mention of MacGuyver and being called a fragile, soy drinking, emotionally unstable loser."