Self-proclaimed "recreational mathemusician" Vi Hart has posted an excellent short film explaining the science and mathematics of sound, frequency, and pitch. Basically Hart shows us how the chromatic scale was originally measured, how musical instruments work, and how we hear sound. It's playful and smart -- exactly what you need to watch right now if you have even the vaguest geeky interest in music, math, or sound.
Sample lines (shown as speech bubbles on a map, when describing how some cultures... READ ON