SAT III Question

[Farrell]

Every once in a while (it happened the other day on a Knabe console about
15 - 30 years old) I'll tune a piano that seems to defy the SAT. I do the
FAC in the normal manner, but when I start tuning and checking octaves, I
find that the calculated octave stretch above A4 is way too much. I find I
need to enter a Double Octave Beat (DOB) factor of up to -2.0 to settle the
calculated tuning down enough for my tastes. This is after measuring the "A"
and "C" values several times - and even notes next to them. Anyone have a
thought on why this might occur?

Terry Farrell
Piano Tuning & Service
Tampa, Florida
mfarrel2@tampabay.rr.com