A recording made in my backyard of a typical magpie carol (a territorial song that a group of magpies will sing together, with one magpie starting the call and the others joining in). The first time is at normal speed, then the call has been timestretched repeatedly, starting with twice the length, then four times, eight and so on, until the recording plays for sixty-four times the original length. I used IRCAM Labs TS 2 for the timestretching. The final results sounds very much like Ligeti or some primitive electronic soundtrack, which is not surprising given the Australian magpies' peculiar method of producing sounds (read Gisela Kaplan's paper on the subject here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3187623/ )