Just to make sure I've got it: harmonics will always sound like (be?) octaves relative to the fundamental. But all the less-dominant frequencies are overtones, even if I somehow get a tritone or something gross sounding.
Now what happens when I play a chord and get overtones out of the interaction between two strings or a choir? What's happening there?
Now what happens when I play a chord and get overtones out of the interaction between two strings or a choir? What's happening there?