[amplifiedrhythm]

I think it's because programming and music theory are actually very similar. Both involve manipulating a set of rules creatively to make something that is satisfactory to yourself, while following conventions set by professionals that came way before you. It's really very similar.

[tsuipen]

Western music theory and programming are similar in that both are systematic concepts and can use numbers or "functions" to express them. The thing is, that description fits many things (even painting, drawing, photography, etc.), so it makes the relationship between programming and music less unique and less noteworthy.