A 435 or A 440 ?

[David Nereson]

-----Original Message-----
From: pianotech-bounces at ptg.org
[mailto:pianotech-bounces at ptg.org]On Behalf Of Jack Houweling
Sent: Tuesday, July 25, 2006 11:01 PM
To: pianotech
Subject: A 435 or A 440 ?

Hello

I am working on a Mason and Risch grand piano and the plate has
a stamp that says  " International Pitch A 435" .

Is it best to tune this piano to A 435 ?

The mother tells me the daughter has perfect pitch. She is away
at school so I cannot talk to her.  Would someone with perfect
pitch be bothered by anything other than A 440?

Jack Houweling


Nobody has PERFECT pitch.  Some people have very good pitch
recognition.  But to most of them, if you played A435 and asked
them to tell you what note it was, they would just say “A,” not
“an A that’s a bit flat.”   At any rate, the plate and frame can
most likely handle having the pitch raised to 440.  You might
check to see that the plate bolts are snug.  But yes, it was
designed to be at 435.  And 440 is only 5 beats per second sharp
at A #49.   There are probably times during humid summers when
it’s way sharper than that.
            --David Nereson, RPT
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