> For example, why does he stop adding notes to the major chord when he has three of them? This particular complaint isn't very valid. The author explicitly wr

> For example, why does he stop adding notes to the major chord when he has three of them? This particular complaint isn't very valid. The author explicitly writes that he could keep going, but is going to stop at three for reasons that will be explained later. He then explains later that the next note (the 7:4 interval) doesn't work well on equal tempered instruments because it ends up sounding like a dominant/minor seventh chord instead of a harmonic/barbershop seventh chord.