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Re:The Geometry of Musical Chords by Rod on Saturday March 14, 2009 @10:05PM (#516490)
These books are also interesting (and require no more than elementary math):

Mathematics and Music (by David Wright) http://www.math.wustl.edu/~wright/Math109/00Book

Theory and Techniques of Electronic Music http://crca.ucsd.edu/~msp/techniques.htm

Re:The Geometry of Musical Chords by menloparkbum on Saturday March 14, 2009 @10:22PM (#516497)
I like the Musimathics books:

http://musimathics.com/