TuneLab goes commercial

[Robert Scott]

Tony,

For the 6:3 you have it backwards.  A 6:3 single octave refers to
the matching of the 6th partial of the lower note with the 3rd partial
of the upper note of the octave.  You got it right in your description
of a 4:1 double octave.

Similarly, 3:2 and 6:4 fifths refer to the matching of the two
different coincident partials.  The reason that they are included
as an option in the tuning curve editor is because of the interest
in the Colman perfect 5th temperament.  You may want to see how
close your particular tuning curve would come to perfect 5th
tuning.  If the curves for 5ths are confusing, don't worry about it.
The tuning curve model in TuneLab Pro is more suited to the various
octave tuning styles.

The Steinway D sample tuning file included with TuneLab Pro is
derived from inharmonicity values published in The Calculating Technician
by Dave Roberts.  Based on the measurements you took on your
Steinway D, it seems that data in Roberts is not very different.
If you like to have A0 come out to be -12 cents, then you are free to
do so.  The deviation curve in the tuning editor is just a guide.
You don't have to follow my suggestions.  In fact, I fully expect
that experienced tuners will develop there own tuning curve
criteria.  For example, try selecting 10:5 or 8:4 single octaves.
That will get you closer to -12 cents for A0 on a Steinway D.

-Robert Scott
  www.TuneLab-World.com

Tony Caught wrote:

 >I have downloaded your new Tunlab Pro and like what I see. But I does not
 >understand what the different settings mean in the tuning template. I am
 >putting this on the list because maybe there are more dummies out there who
 >are also confused.

 >Press T.  Adjust via 6:3 single octave in bass and 4:1 double octave in
 >treble, as this is how aural tuners tune.
 >In the bass, 6 refers to the 6th partial in the high note and 3 refers to
 >the 3rd partial in the one octave lower note ?
 >In the treble, 4 is the partial of the lower note and 1 is the fundamental
 >of the two octave higher note. ?
 >In the bass section:
 >What are 3:2 fifths and 6:4 fifths ? What is an octave and a fifth denoted
 >at. ?

 >Sorry, I am confused, you say use the 6:3 octave in the bass and using your
 >sample Steinway D file this give a -2.44 cents at A0. To me that is too high
 >and if I say I want to have pure double octaves in the bass and go on to 4:1
 >double octave in the bass, I wind up with a reading of +1.77 cents on A0.
 >If I use 3:2 fifths it is -7.5 cents on A0 and using 6:4 fifth, it is -10.6
 >cents on A0.

 >I tuned a Steinway D today and took measurements on C1 thru C6, F3 F4 A3 A4,
 >and using the T template on 6:3 A0 was -2.51 cents. Close enough to your
 >sample file but, I think that I always tune A0 to about -12 cents.