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Actually all pianos (at least grands) are tuned sharp at the top and flat at the bottom, it's called stretched octaves in the trade.

This is supposed to compensate for how the ear hears as well as for the fact that piano strings, being thick, are not true harmonic resonators, but tend to have harmonics which are off pitch. It's why good piano tuners don't use electronic devices when tuning.

On the other hand I do use one on my harpsichord because all the octaves are true and one has to adjust one octave and them make all the others match. Tuning octaves is easy, you just listen for a lack of beats. Modern electronic tuners even show how far off pitch a note is so it is easy to set other temperaments if one knows the deviation from equal in cents (hundredths of a note).

There is a just intonation group in NYC which tries to play everything in pure tuning. During the annual Bach festival on local station WKCR they invite the director on for a segment to illustrate how tuning affects the sound. Now the station is online as well so people can hear it everywhere. The festival starts up a few days before Christmas each year and runs for 7-10 days.

Policies not Politics
---- Daily Landscape

by rdf (robert.feinman@gmail.com) on Sat Apr 12th, 2008 at 01:32:43 PM EST
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