[pianotech] Double Octave Stretch

Mark & Janine Davis pianofortetechnology at saol.com
Fri Feb 5 14:05:18 MST 2010


Greetings List,

I have read much about piano tuners preferred octave stretch.  I recently
came across a grand piano in a fairly large school hall which had been tuned
two weeks prior to me inspecting the piano on request.  The octaves were
stretched 1 bps and the double octaves were beating almost 7bps.

Rick Baldassin writes in his book "On Pitch", pg 83.84,85.  'There are
widely varying opinions as to where and how much to stretch octaves, and
rather than impose my personal opinions, I choose to present facts and tests
that will allow each reader to experiment and create his or her own opinions
as to how and where stretching should be done. After all, in octave
stretching, what we are dealing with is often more a matter of artistic
preference in a grey area than random selection in black and white.Remember
that when stretching the octaves, the demands of the double octaves must
also be met.'

My questions are, what are the demands of the double octave and what is the
maximum stretch one can/does use in a big concert hall, once again
considering the double octave demand?  In other words how much stretch is to
much and the reasons why?

Thank you, Mark Davis 

   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100205/cb3a1962/attachment.htm>


More information about the pianotech mailing list

This PTG archive page provided courtesy of Moy Piano Service, LLC