Cantering the Panel ?

Richard Brekne Richard.Brekne@grieg.uib.no
Mon, 09 Dec 2002 12:15:40 +0100


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Hi folks

A couple weeks back an old timer told me that it was a good
idea to tune up from the tenor to the low treble... say
around C5, and then tune downwards from C8 for the first
pass. His reasoning was that as you tune upwards you are
pressing down somewhat on exactly where you just adjusted
tension, and this forces the immediate area adjacent and
towards the side with most crown upwards a tad. So tuning up
to C5 and then down from C8 was to put this matter to good
work as it were... tending to push this killer range of the
soundboard upwards. Nice theory I thought, but I mean
reaaalllly...

So anyways.. I decide to try it out and see if I can notice
anything at all and low and behold.... I notice a rise in
pitch in exactly this area. First  couple pianos it just
struck me as things were moving around a bit unusually, then
on the 3rd instrument I decided to run a quick pitch check
in the middle high treble before starting the tuning, and
then again before starting tuning that area... sure enough
the whole section had raised in pitch. This instrument was a
pitch raise to begin with of roughly 50 cents. (Bass around
30 cents, lowest tenor around 70 cents, tenor 40-50 cents,
mid treble about 30 cents below the treble / tenor break, 50
above tapering off to around 70 in the highest treble) I saw
a definant rise of 3-4 cents in the range C5 to F6 (which
was what I looked at in my before and after testing).

Now I dont know exactly what to make of this, but I thought
I would throw it out there for any commentary or
explanations anyone might have.

Cheers

RicB


--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html


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