<HTML>In a message dated 9/27/01 8:34:37 AM Central Daylight Time, jformsma@dixie-net.com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">They both "agree" with each other, and both sounding together produce a "perfect" octave in which all the partials best agree. When tuning treble octaves, if your top note is too sharp, you can think of your triangle leaning to the right. When the top note is too flat, you can think of the triangle leaning to the left. To correct a bad octave, make your triangle stop leaning, and come to the "straight up" position. I still test my octaves, but find that I have to do less retuning with this technique. </BLOCKQUOTE> John The concept is good, but the result might not be what I want. In order for the treble to sound more in tune, we generally have to stretch the top note a tad. So in a sense, although you can visualize a straight standing triangle, you actually want to have that triable leaning to the right. When I used to tune strictly by ear, I tuned, what I thought, were "perfect" octaves, the kind you are visualizing. My wife, Jan, also tunes, but relies more on the Accutuner. We both tuned for the same customer, a friend from church, who told me that she liked Jan's tuning better. I listened to the tuning, and to my ears, found the top octaves too high. When I started using my Accutuner almost exclusively, (except for unisons), I had to get used to what the machine was telling me. At first I kept trying to bring down the octaves. But now that I am used to it, the octaves do sound much better. Wim</HTML>