In the late 1950s, former CBS Radio musical director and composer Jim Fassett collaborated with CBS radio technician Mortimer Goldberg on a masterpiece of tape music, Symphony of the Birds. It's quite literally a collection of bird songs recorded in the field by Jerry and Norma Stilwell that Fassett and Goldberg cut up and manipulated into a captivating and complex piece of musique concrète. You can spin your own copy of the original LP for $15 via Discogs.
(via Weird Universe)