http://kotaku.com/gaming/clips/retro-game-tunes-midi-art-so-friggin-awesome-325287.php
Quotehis comes via commenter Muu, and it's probably easier to explain through watching, but here goes: In the above clip, MIDI is being used to convey musical notes and as art. The individual who created this arranges all the music himself and then pipes it through a program called Music Animation Machine player. The response to these clips has been tremendous, encouraging the creator to churn out more. Actually quite amazing stuff! Hit the "more >>" for, well, more.
A new take on music visualizations... Kinda neat
Edit: fixed link
Is there a link?
There is now.
Cool!
Not so game related, but check this out:
http://www.youtube.com/watch?v=u-KMFxzA_Lk
Little band called Aphex Twin's piece called "Equation" put to a spectrogram, wait till the end, its worth it.