Here you can choose the sounds that RoasterThing makes to warn you of impending doom. If you want, RoasterThing will start making noise 1 minute before the countdown timer reaches 0 and when the count up time has reached the preheat warning time during a preheat. The Play button lets you hear what the chosen sounds sound like.
One of the users suggested adding sound and while they are quite annoying when you don't need them, the one that comes on at the end of preheat has saved me more than once.