Got it a few moments ago and just want a quick help on how to set the sound I want it to play, and how long does it have to be.

Keep the sounds short, as in a few seconds maximum. Also make sure it's a .wav

If you use Audacity (free software) and export a sound as .wav using the default settings it'll work perfectly with TB.

Does this sound work on other people's computer's as well, like if they saved the replay?