Audios of Clearance Delivery will be found here exclusively. Clearances may be pretty simple when the controllers issues what the pilots or the company filed (i.e. Cleared as filed). However, when ATC has to issue and amended clearance, things might get a little bit more complicated depending on the complexity and the speed of delivery. We have a variety of audios from different parts of the world. Keep in mind the differences that may exist from FAA to ICAO.