https://www.youtube.com/watch?v=HTWyXiaFyqc
https://www.youtube.com/watch?v=c-_DhG0Haas
https://www.youtube.com/watch?v=PRbWW-HZd0Q&feature=youtu.be
http://monoskop.org/log/?p=5720
http://reaktorplayer.wordpress.com/2009/11/14/the-worlds-first-drum-machine-the-rhythmicon-1931/
http://www.livescience.com/33673-tree-rings-sound-record-player.html
https://www.youtube.com/watch?v=pBjIYB5Yk2Ihttp://www.nasa.gov/multimedia/nasatv/iss_ustream.html#.UzFIgvldWSo