MathOfTheWesternMusicalScale

There's a decent article in issue 4 of the Napalm e-zine on Just Intonation and the western scale in general:

http://napalm.firest0rm.org/issue4.txt

It describes what makes a chord sound in tune to our ear, the logarithmic nature of our perception of sound, and how we went from just intonation to the less precise compromise of the modern scale. Pending their permission, I'll post the entire article text here.