Like the infinite monkeys typing Shakespeare, but with audio instead.
If there was a program that created a series of sounds at random intervals, pitches, amplitudes, etc., how long would it take to produce an output that sounds like music, some sort of recognisable recording (e.g. a bell ring, a dog barking), or perhaps even a human voice?
If it is truly random, where every outcome is equally likely, then Beethoven’s 5th could be the first thing produced. It could also take an infinite amount of time to produce.