high or low?

[Joseph Garrett]

It is, IMHO, impossible to ascertain if a piano is a low/medium/high tension
scale, by the readings gained on an ETD. Case in point: A Square Grand,
which has a relatively Low tension scale will have an ungodly amount of
inharmonicity, that causes C8 to be above 60cents! Whereas, an over-damper
upright, which also has a Low tension scale will have "stretch" factor of
.6cents, in the temperament octave and C88 at below 20cents! Both are,
essentially Low Tension scales, but each manifests itself differently!
The only way to quickly check a piano for it's Low/Medium/High Tension scale
attributes, is to measure A49, calculate it's tension and use the perimeters
that Del gave. Usually A49 is a good indicator of the overall tension the
designer had in mind.
Best Regards,
Joe Garrett, RPT, (Oregon)

Been There, Didn't Like It, So I'm Here To Stay! [G}