This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment ----- Original Message -----=20 From: Roger Jolly <baldyam@sk.sympatico.ca> To: <pianotech@ptg.org> Sent: Tuesday, June 20, 2000 7:55 PM Subject: Re: String coupling. Also in every case, the unison sounded rougher than I can tune it = aurally. Touching up aurally, the unison pitch drop disappeared again, or was greatly reduced. Checking each string individually against the display, they weren't precisely the same anymore, but the unison as a whole was = on pitch and sounded good.=20 Why? =20 Because it was done aurally!! Hi Ron, At least you restored my sanity, well the little that I = never had. With a new set of hammers, very carefully mated to the strings, I = have noted that the partial pattern is very different on the centre string, = by single straight line needling up the cup line to pop the cup and then = re mating, similar patterns were obtained on all 3 strings. Card, level the strings....no "popping" the "cup line??" then remate??? Simpley shape the the hammers (eliminates the "cup") then voice!! The ETD unison will now both show and sound correct. =20 The only conclusion on my part is that the ear is a remarkable = instrument, in that it can compensate in a manner that is amazing, when dealing with slightly = false beats and mis aligned partials. Then learn to use it! Please pass the straight jacket. It's all yours. 8~) Bob Moffatt=20 ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/cc/db/b8/51/attachment.htm ---------------------- multipart/alternative attachment--
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