I think you are better off tuning unisons as you go anyway. If you are setting the temperament aurally and need to use a mute strip for the temperament octave (or two) then pull the unisons after setting the temperament and tune unisons as you go the rest of the way. I think it makes for better stability. David Love ----- Original Message ----- From: "Isaac OLEG SIMANOT" <oleg-i@wanadoo.fr> To: <pianotech@ptg.org> Sent: March 23, 2002 11:30 AM Subject: RE: Muting high treble > > > On some pianos the coupling effect put the unisson sharp after 1 second > ringing. the EDT will read an unison sharper than the one string alone > sounding, because you have to wait to have a clear pattern. > > That can depend of the way the unisons are done too. > > > Isaac OLEG > > > > > -----Message d'origine----- > > De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part > > de Don > > Envoye : samedi 23 mars 2002 07:30 > > A : pianotech@ptg.org > > Objet : Re: Muting high treble > > > > > > Hi Jay, > > > > I have tried to measure the effect you are speaking of. It would be rare > > for it to be as large 2 cents and it is inconsistant from piano to piano > > even with the same make and model. I suspect if you are having > > this sort of > > pitch drop after doing a unison that plate flex (pitch correction) is > > making the difference. > > > > At 03:03 AM 3/23/02, you wrote: > > >I thought this phenomenon is just the opposite. The pitch > > sounds 2-4 cents > > >sharper when the strip mute is in, compared to when it's out and > > after the > > >unisons are tuned. Isn't this common and tuners must compensate? > > The pitch > > >difference is obvious when comparing a muted trichord - hearing just one > > >string compared to the overall pitch after tuning its two unisons. > > > > > >Jay Mercier > > > > > > Regards, > > Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. > > > > mailto:pianotuna@accesscomm.ca > > http://us.geocities.com/drpt1948/ > > > > 3004 Grant Rd. > > REGINA, SK > > S4S 5G7 > > 306-352-3620 or 1-888-29t-uner > > > >
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