Interval arithmetic: Difference between revisions

Diatonic interval arithmetic is a set of rules governing diatonic notation systems, which says that the degrees of stacked intervals should always follow arithmetic if 1 is subtracted from all degree numbers. For example, a stack of two thirds is always a fifth, since (3-1)+(3-1)=(5-1), and more specifically: [come up with some simple rules to deal with the fact that adding some intervals results in major intervals and sometimes it's augmented and auuuugggghhhhh]