So I've been trying to make some custom sounds for my iPhone and I've ran into a problem that I can't seem to solve quickly. So I'm decided to stop trying to use Google and just make a topic about it. I've got Quicktime Pro and exported a sound I would like to .AIF then just changed the extension to .CAF then I drop it into my theme folder under UISounds and set as unlock.caf and I don't get in audio at all. Does the sound have to be less than 3 seconds or something?