Good morning.
Tonight while trying to sleep I had an idea: What if I try to play the Pi number on a keyboard making a relation between notes, 1 being C, 2 being C#, 3 being D and so on.
This morning when I was about to try it I surfed the net to see the first 2 dozens of digits of the Pi number, and found that my idea was not new. Somebody had even made an online program to directly convert the first 10 000 digits of the famous 3'14 ... sequence on music with this relation:
http://www.avoision.com/experiments/pi10k/pi10k.html
You can use a predefined scale (clicking on the top right scales) or create your own correlation.
On the botom there are some icons to see other experiments.