Despite being composed over months by thousands of people around the world, the melody is pretty tuneful, and even hummable - though slightly predictable. Up the tempo and the melody becomes more catchy.
This isn't the first time musicians have tried to use the wisdom of the crowd for their compositions.
In 2013, Swedish DJ Avicii asked people to submit and vote on sounds, with the top choices incorporated into the song X You.
In Detroit, Michigan, MIT composer Tod Machover and the city orchestra asked residents to contribute locally found noises, like the rev of a Mustang's engine or a morning market, to a collaborative symphony. The final composition, due to premiere on November 20, will stitch the sounds together into a musical piece that reflects the city.
The CrowdSound song is currently up to the conclusion part, and there are fewer than 100 notes left to vote on. If you want to know what a song composed by humanity sounds like - and you'd like to contribute your musical vote, visit crowdsound.net.