VT specific, (was pitch raises, multi passes)

[Ron Koval]

replys throughout

I wrote
".....I almost always use two passes even with pianos close to pitch."

Terry responds:
Let's say a piano is close to pitch (2 to 5 cents flat). You want a really 
nice tuning, so you will do two passes. Will you do the first pass in pitch 
raise (Coarse) mode? Or will you do both passes in Fine Tuning mode? As far 
as the tuning calculation process goes, is there any difference in the way 
the VT will calculate the tuning with either approach?>
>



Yes, I would start in coarse mode, with the range set to narrow to give me a 
good target for the needle.  I even went so far as to apply a screen 
protector, then put a little pen line that represents +1 cent.  I want 
everything in the first pass (in your close example) to land in that space.  
As to fine tuning mode, I haven't done enough experiments with the current 
tuning order to check if it ends up in the same place.  Remember, in fine 
tune, once you tune a note, it's no longer available to be recalculated, 
unless you recalculate the entire tuning.  This can end up with a good 
tuning, just not as good as it could be.



Terry writes:

Let's say another piano is closer to pitch (0 to 3 cents flat). Still reason 
to do two passes for a really fine tuning. What modes will you use for this 
one and why?
>

Hmmmm.. here in the midwest, I hardly ever come to a piano like this!  
Because of my current mistrust of fine tune mode (paranoid?) I'd still opt 
for coarse.  I'm currently beta testing the new spinner display Dave had in 
Chicago.  Picture the coarse mode line, turned into a circle, around the 
spinner.  Best of both worlds, needle display, and spinner.  The scale is 
still changable from narrow, normal, and wide.


Terry writes:
What overpull percentages do you find work well with your VT? And when doing 
a pitch raise pass, in what order do you proceed across the keyboard (start 
at A0 and go up, or what)?
>



Overpulls are personal, tied to your own tuning technique.  I target 8%,20%, 
and 33%, and display them all at the same time.  I use them more as a frame 
of reference, paying attention if one note is very different from the rest.  
It's surprising how close these three percentages display to each other 
during a pitch adjustment.  It also depends on the type of instrument, some 
respond differently.

As to pitch raise order,  I think A0 to top has been shown to be the best, 
but the VT will only do this if you take the time to presample all 76 notes. 
  Hmmmm.... you could probably just presample A4 to the bottom and it would 
work, too.  I tune A4,A3, all the notes between, A3 down to A0, then A4 to 
the top.  This lets me stay in single step mode, and jump octaves between 
the A's.  I think it's important to get the bass strings tuned before going 
to the top.

>
Thanks, thanks, and thanks.

Terry Farrell

You are very welcome  :)

Ron Koval
Chicagoland





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