Treble creeping sharp

[John Formsma]

Maybe this was one of the times when the Verituner chose to screw up.
:-)  When I was using mine, it happened 2-3 times where the whole
piano ended up being 4+ cents sharp.  The only thing I could determine
was that it accidentally set itself to a higher pitch than A440 for
the first pass.

But aside from that possibility, how much overpull did you use? Some
pianos react differently than the 33% overpull "standard." Maybe this
is one of those pianos.

I've heard others on the list mentioned individually tied strings
needing less overpull.

Doesn't it take longer for humidity to affect a tuning like that?
Temperature will cause the pitch to change quickly, but humidity takes
longer. Like days, not hours.

JF

On 4/2/07, Jon Page <jonpage at comcast.net> wrote:
> Last week I pitch-raised a 7' Bosendorfer about 30 cents.
> After the second pass, I checked the treble and it was anywhere
> between 2 &4 c sharp.
>
> This is a fairly new piano with an exposed pin block (tuned very nicely). I
> attributed it to the fact that it had a cover with full length sides
> (to the floor)
> and that the piano was acclimating to it's exposure to the air. (no DC).
>
> I experienced something similar to this a few years ago while preping for
> a concert. The piano was brought it from a non-AC location to an AC'd
> building. A quilted cover was on it. The piano had bee placed the day before.
> But after emoving the cover and through the tuning, I noticed the shifting.
> So I waited a bit (action maintenance) and resumed keeping my finger crossed.
> I wasn't too worried, they were going to play something by Crumb.
> --
>
> Regards,
>
> Jon Page
>