[pianotech] ETD stretch vs pure (octaves)

wimblees at aol.com wimblees at aol.com
Fri Nov 13 12:05:34 MST 2009




At least Cybertuner has stretch factors built-in. Do you aural tuners do
tretch factors?
How do you tune "pure" octaves with a "stretch" factor - this seems
xymoronic.
Duaine

There will be others who understand this better than I do, but the way I understand it is that without "stretching" the octaves, the upper notes will not be "pure". When aural tuners tune the higher notes without "stretching" them, they will actually be a little below pitch. It's even worse when tuners use a Conn tuner, which doesn't stretch the octaves at all. (It doesn't even set a temperament). Although the octaves might sound in tune, its is actually on the flat side. 

Unfortunately I learned to tune with an old SOT, which only tuned up to F6. I had to tune the rest by ear. I thought I was doing OK, until I bought a SAT. I could hear the difference right away, and had to retrain my ear.  

Wim

-----Original Message-----
From: Duaine & Laura Hechler <dahechler at att.net>
To: pianotech at ptg.org
Sent: Fri, Nov 13, 2009 5:25 am
Subject: [pianotech] ETD stretch vs pure (octaves)



This may seem like a silly question but ....
At least Cybertuner has stretch factors built-in. Do you aural tuners do
tretch factors?
How do you tune "pure" octaves with a "stretch" factor - this seems
xymoronic.
Duaine
-- 
uaine Hechler
iano, Player Piano, Pump Organ
uning, Servicing & Rebuilding
eed Organ Society Member
lorissant, MO 63034
314) 838-5587
ahechler at att.net
ww.hechlerpianoandorgan.com
-
ome & Business user of Linux - 10 years

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