Bicycle Built for 2000 is the latest project by Aaron Koblin and Daniel Massey. They took the song Daisy Bell (a.k.a. Bicycle Built for Two) and synthesized it, breaking the song down note by note. They then paid Amazon's Mechanical Turk workers to listen to a note of the song and reproduce it to the best of their abilities. None of the workers knew about the greater goal, they were only informed of their task. All the sampled notes were put back together into a complete song featuring over 2000 human voices. Amazing!