electronic over/under pulling

[Ron Koval]

There have been some good answers already, but I'd like to add a bit....

Gregor asked
"But how do you raise pitch with vt? Or
better asked: why do you do it with vt?"

Why?  My goal is to get as close to possible to a fine tuning after a single 
pass.  As has been indicated, the machines are able to calculate an overpull 
based in part on where the note starts.  The process is not quite that 
simple, since we are trying to correct for a shifting structure, not just 
single notes.  The Reyburn program is the best (it remains that way due to 
copywrite limitations) because it incorporates an averaging function as well 
as the "lookup table" - a user adjustable database that alters the overpull 
percentage note by note.  Those that take the time to customize the program 
based on their tuning technique and piano model can get amazingly close 
after one pass!

Now, on to "how".... using the Verituner.  I work in a climate where pitch 
adjustments are the norm.  Most of my work is repeat business, so I already 
have the piano measured and saved.  If there is a drawback to the Verituner, 
it is that it will continue refining the tuning as new information is 
measured - which is a good thing for a really fine tuning!  But during a 
first pass, the tuning is changing enough to make getting close to a fine 
tuning difficult.  I have chosen to do a five minute or so pre-measuring 
step to get enough inharmonicity data into the machine before tuning a new 
piano.

In "coarse mode", select the preferences to display the needle.  Display all 
three over pull targets.  Once a note is played, the line marks the 
beginning pitch and the three triangles display the three overpull targets - 
think of the first one as the wound strings, the second one as the middle of 
the piano and the third as the top section.  The spinner will be tied to the 
first target, so only watch the needle.  You can change the percentages to 
match your style.  As you progress, pay attention to the overpull cents - if 
there is a wildly out of tune string, or the machine mis-measures, just 
overpull about as much as you've been doing for the previous few strings.  
If you tap the screen on a pocket pc, the pitch will be remeasured for 
overpull.

Use the zoom function to balance between resolution and being able to 
measure far from proper pitch pianos.  If the piano is way off, turn off the 
auto note and use the little middle button to advance to the next note.

Ron Koval
Chicagoland

_________________________________________________________________
Talk now to your Hotmail contacts with Windows Live Messenger. 
http://clk.atdmt.com/MSN/go/msnnkwme0020000001msn/direct/01/?href=http://get.live.com/messenger/overview