Music and maths links to follow up

Maths patterns that occur in music:
the golden ratio
fibonnacci sequence

Maths patterns behind sound:
Pythagoras' theorem
Physics analysis of sound waves

Writers on music:
Boethius - De Musica
Gödel, Escher, Bach: an Eternal Golden Braid (commonly GEB) is a Pulitzer Prize-winning book by Douglas Hofstadter

Other maths/music links:
Tuning systems
Musical set theory (as developed by Milton Babbitt, Allen Forte
Transformational theory is a branch of music theory developed by David Lewin