Robert Schumman's 3^rd symphony in E flat major, also called Rhenish Symphony, is known for being an inspiration for James Horner's work on the original score of the movie Willow.

Matt Mullholand does a lot of a cappella covers (as well as original songs), and I can't post all of them here. So I'll just post a scene from one of my favorite movies, all sounds done by mouth and a single guy.

Created by Microsoft in 2009, Songsmith is a software that lets you record your own voice, and it will create a musical accompaniment. It didn't take long before people tried applying it's genious algorithm to famous musical pieces. Here are my favorites.