Really? You can't spend 5 minutes to look up software that will generate many different types of noise, perhaps even tuned for the use case? And why the resentment for free software? You are gonna have an easier time finding that kind of stuff as a simple webpage or better yet on f-droid rather then on an ad infested, corpo boot licker laden platforms like google play and the app store. Just the fact you don't have to sweep trough heaps and heaps of garbage is a plus. Sure normies are gonna prefer paying for an mp3 or whatever, but we are on hacker news, we should strive for better. (and maybe help enlighten our fellow clueless users...)