<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <meta name=ProgId content=Word.Document> <meta name=Generator content="Microsoft Word 9"> <meta name=Originator content="Microsoft Word 9"> <link rel=File-List href="cid:filelist.xml@01C6B11F.EFEB8510"> <link rel=Edit-Time-Data href="cid:editdata.mso@01C6B11F.EFEB8510">  <style>  </style>  </head> <body bgcolor=white lang=EN-US style='tab-interval:.5in'> <div class=Section1> <![if !supportEmptyParas]> <![endif]><o:p></o:p> <![if !supportEmptyParas]> <![endif]><o:p></o:p> -----Original Message----- From: David Ilvedson [mailto:ilvey@sbcglobal.net] Sent: Wednesday, July 26, 2006 8:57 AM To: dnereson@4dv.net; pianotech@ptg.org Subject: RE: A 435 or A 440 ?<o:p></o:p> <![if !supportEmptyParas]> <![endif]><o:p></o:p> 5 beats per second?...if 442 is about 8 cents sharp, 438 would be about 8 cents flat and 435 getting close to 20 cents flat...that seems like a pretty hefty difference...I'd think it was noticeable to a 440 perfect pitcher... David Ilvedson, RPT Pacifica, CA 94044<o:p></o:p> Yes.  If it were at 439, it would beat once per second with the fork.  At 435, it will beat 5 times a second.  Yes, some of those with so-called perfect pitch will notice, but many would not.  Twenty cents seems like a lot when you have to raise or lower pitch.  But it’s only a fifth of a half-step.  Some people don’t notice their pianos or trumpets or guitars are off until they’re almost an entire half-step off pitch.  I’d like to see a study where 100 people who say they have perfect pitch are asked to hum an A, or C, or any other note, and see how close they actually are.  This subject came up a year or two ago.  Turn on your ETD, hum some note and see how closely you can hold it “right on.”  The human voice just is not as accurate as a signal generator.<o:p></o:p>             --David Nereson, RPT      <o:p></o:p> <![if !supportLineBreakNewLine]> <![endif]><o:p></o:p> <div style='border:none;border-left:solid black 2.25pt;padding:0in 0in 0in 4.0pt'> <div class=MsoNormal align=center style='margin-left:.5in;text-align:center; border:none;mso-border-left-alt:solid black 2.25pt;padding:0in;mso-padding-alt: 0in 0in 0in 4.0pt'> <hr size=2 width="100%" align=center> </div> Original message From: "David Nereson" <DNERESON@4DV.NET> To: "Pianotech List" <PIANOTECH@PTG.ORG> Received: 7/25/2006 11:43:15 PM Subject: RE: A 435 or A 440 ?<o:p></o:p>  <o:p></o:p>  <o:p></o:p> </div> <div style='border:none;border-left:solid black 2.25pt;padding:0in 0in 0in 4.0pt'> -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On Behalf Of Jack Houweling Sent: Tuesday, July 25, 2006 11:01 PM To: pianotech Subject: A 435 or A 440 ?<o:p></o:p>  <o:p></o:p> Hello<o:p></o:p>  <o:p></o:p> I am working on a Mason and Risch grand piano and the plate has a stamp that says  " International Pitch A 435" .<o:p></o:p>  <o:p></o:p> Is it best to tune this piano to A 435 ?<o:p></o:p>  <o:p></o:p> 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? <o:p></o:p>  <o:p></o:p> Jack Houweling<o:p></o:p> </div> <div style='border:none;border-left:solid black 2.25pt;padding:0in 0in 0in 4.0pt'>  <o:p></o:p>  <o:p></o:p> 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.    <o:p></o:p>             --David Nereson, RPT <o:p></o:p> </div> </div> </body> </html>