A composer by the name of Jim Wilson has recorded the sound of crickets and then slowed down the recording, revealing something so amazing. The crickets sound like they are singing the most beautiful chorus in perfect harmony. Though you may think it is human voices, everything you hear in this recording is in-fact crickets themselves!
This recording contains two tracks played at the same time: The first is the natural sound of crickets played at regular speed while the second is the slowed down version of crickets’ voices.
Listen here
http://beyondblindfold.com/someone-recorded-crickets-then-slowed-down-the-track-and-it-sounds-like-people-singing/