This part re-emphasizes the difference between the natural over-tone series (with the harmonics) and the equal temperament (compromised) division of the fret board. For instance, you cannot produce a perfect major third interval, unless you use the 4/5 division where you can obtain the perfect major third. So, always keep this in mind when using overtones. If you want to be in tune with a guitar chord/track, opt for using only ½, ¼ or 1/3 nodes which will all be in sync with the equal temperament system (or rather the reverse is true, it is the frets that are synced up with the harmonics).
