This site contains selected topics about mathematics and music (mostly electronic music). Previous to the production of sound and music by electronic media the ability to do arithmetic was probably enough of a mathematical background to understand most aspects of music. A good place to start to learn about this earlier theory of music is the book, "On the Sensations of Tone", by Hermann Helmholtz. It was published in 1864 and is still in print and it is still used as a reference at times in articles on technical topics in electronic music. The advent of electronic music has somewhat changed this situation.
Page four contains material on microtoality,especially just intonation and well-tempered scales. Page six contains material on the following topics: sound synthsis,algroithmic composition and sound prosessing to compose music or create sound.