Ask HN: About music, scales, intervals, mathematics, musical interfaces

I can't find a post which i'm quite sure i found here. The article was posted in hackernews, and started with some simple acoustics, mathematics and elementary music theory. I don't think there was too much about harmony in it. Probably there were mentions of the circle of fifths though. At some point the writer diverted to a road describing certain ideas about how the western music was also shaped by the ergonomy of the instruments used and finally he introduces his idea own for a new interface.

The article was a little bit too hard for me to ubderstand i whole, but i'd like to give it an other try.

Please help me finding it again, and excuse my english writing.. :-)