Maths and Music go hand in hand. We’ve always been inspired by number sequences when making up or tunes. Johnston’s Cows takes some ideas from Tom Johnston and his idea of found mathematics.
Here’s a few Documentaries about Science and Music:
The Code is a BBC doc. that investigates how mathematics permeates the physical world.
The Music Instinct: Science and Song features Bobby McFerrin and goes though examines Music through science and anthropology.
How Music Works looks at the absolute fundamentals of sound and music. I find the stuff about non-western music really interesting in this.
http://topdocumentaryfilms.com/ is a brilliant place to find documentaries for free.
And another yoke.
Also a friend of our Billy Kemp puts good stuff up on this : http://willly.tumblr.com/
Slan.