This is a random drone generator. You can generate a random drone sound, then download the Pure Data patch by clicking on "Download PD patch".
This is a demo of the pd-fileutils and the WebPd libraries. pd-fileutils is used to generate the random patch, and WebPd allows to load the patch and play it in the browser without plugin.
pd-fileutils - Copyright (c) 2013 Sébastien Piquemal <firstname.lastname@example.org>. Complete license here