Inharmonicity

[Kerry Cooper]

Paul,

I am sure that David Lawson knows what 'Inharmonicity' means. As he has been
in the industry for over 45 years, and has worked for Steinway London. What
he was saying is that it is not in the Macquarie Dictionary. Don't jump to
conclusions!! 
The Microsoft Dictionary does not like it either!! 

Kerry Cooper ARPT
Brisbane Piano Centre
ph:    +617-3809-0652
Fax:  +617-3809-4699
email: brispiano at optushome.com.au


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Paul Milkie
Sent: Monday, 5 February 2007 1:50 PM
To: pianotech at ptg.org
Subject: Inharmonicity

David, in Australia;
Inharmonicity is the discrepancy between the theoretical frequencies of
partials and their actual frequencies.With the exception of the first
partial(the fundamental), the partials of piano tone are sharper than their
theoretical frequencies, which would be exact multiples of the fundamental.
This necessitates tuning octaves wider than theoretical in order to obtain
an acceptable compromise of these discrepancies. The first partial of A4 is
tuned to 0 cents deviation, but all notes above it are tuned increasingly
sharper,and all notes below it are tuned increasingly flatter than what they
would be theoretically. The result is the piano's stretch.
(P.50 of the Verituner 100 user guide).



 
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