<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1400" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Verdana size=2>I've worked out the method of tuning = the Brekne Perfect 12th tuning using Tunelab Pro. (As we know, Ric uses Tunelab 97 = for this, and his method does not work in TuneLab Pro. Tunelab 97 = crashes on my XP machine, and TL Pro has additional features that I like very much, so = I've worked out this method.) Haven't tuned it yet.</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>I would very much appreciate, Ric, if = you can verify that this duplicates the lovely tuning that you achieve. It = should be precisely accurate from D3 through C8. The method for the bass is = uncertain at the moment.</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>1. Take inharmonicity measurements as = normal.</FONT></DIV> <DIV><FONT face=Verdana size=2>2. Go to the Partials window (press = P) and set all partials to 1. Then set the following partials to 3: D3, B4, F6.</FONT></DIV> <DIV><FONT face=Verdana size=2>3. <SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: AR-SA">Click OK and now press T for the tuning curve screen. <SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: AR-SA">Click the button to allow manual adjustment of all 4 aspects of the tuning = curve. </SPAN>Set both bass and treble octave types to 4:1. Now press Z to zoom = out to be able to see the entire curve.</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: AR-SA">4. You now need to make four precise adjustments as follows (it takes = several passes to get these exact):</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: = AR-SA">     a. Toggle the H and Y keys to set the deviation for A0 to exactly zero = (lower pane).</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: = AR-SA">     b. Toggle the J and U keys to set the D3 exactly at 0.0. (This makes the = perfect twelfth with A4).</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: = AR-SA">     c. Read the offsets of B4 and F#6 (somewhere between 5 and 10 cents). = Toggle the K and I keys to make these two offsets match = exactly.</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: = AR-SA">     d. Read the offsets of F6 and C8 (generally 30-35 cents). Toggle the O = and L keys to make these two offsets match exactly.</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: AR-SA">The deviation lines (which are displaying deviations in the 4:1 octaves) = will not be straight, because we are favoring twelfths over double octaves. But the deviation line does stay within +1 to -1.</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: = AR-SA"></SPAN></FONT> </DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: AR-SA">5.  When done, return to the Partials screen to change them to your = preferred partials for executing the tuning (e.g. use 6 from A0 to E1, etc.)</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: = AR-SA"></SPAN></FONT> </DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: AR-SA">As Ric has pointed out, the bass may feel a bit shallow. It is possible to = do the exact same procedure using 6:3 in the bass, except that D3 winds up a = few cents south of zero to accommodate that greater stretch in the bass. (Also the = bass deviation curve is more distorted). As I have not yet tuned this, I = anticipate a strong need to verify the bass aurally and determine what works best. It = will be nice when Bob Scott adds 3:1, 6:2 and 9:3 to the tuning curve menus.</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: = AR-SA"></SPAN></FONT> </DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: AR-SA">Feedback most welcome.</SPAN></FONT></DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: = AR-SA"></SPAN></FONT> </DIV> <DIV><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; = mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; = mso-fareast-language: EN-US; mso-bidi-language: AR-SA">||  |||  ||  |||  ||  |||  ||  |||  = ||  |||  ||  |||  ||  |||  ||  |||<BR>jason = kanter • piano tuning/regulation/repair<BR>bellevue, wa • 425 562 4127 • cell = 425 831 1561<BR>orcas island • 360 376 2799</SPAN></FONT></DIV></BODY></HTML>