Hi Susan, There was an article in the Scientific American about how far a "unison" will draw. I believe it is called "The Coupled Motion of Strings" or something like that. The year was 1981 so I disremember the exact wording. The conclusion was that a unison consisting of two (or more) wires on a moveable bridge will "draw" together and be beat free at a whopping 1 hertz difference. That's why unisons are the "first thing we learn" and the "last thing we perfect". I'm still trying to get *better* at unisons. I don't believe that an ETD that works on just one partial--or displays only the results from one partial or shows an "average" of several partials simultaneously has much chance of creating a totally magnificent unison that "floats on the air" and sustains -- perhaps even blossoms in fullness. In this *one* regard the old "brown box" strobe tuner is better than most of our modern day ETD's. It did at least display more than one partial at once--if you knew what to look for. At 10:08 AM 1/6/2006 -0800, you wrote: >Hello, Ed > >Weinreich effect? Any place I can find out about that? But I agree that >it happens, as you describe it. One can even pluck across unisons, and >find a different profile for some which still sound uniform with the >others, just listening with bare (if aging) ears. > >My feeling is that there's a lot more than just frequency for setting unisons, >since one has to make false beats (even small, slow ones) cancel each other in >a particular way for the beauty of sound to emerge. Not, perhaps, the most >efficient way, which sometimes causes the sound to contract and go thin and >white. And of course, it has to be stable. > >Just MHO (Marshall, "my HUMBLE opinion" ... i.e., if this seems arrogant, >it is unintended.) > >As usual, Ed, you give us a good and interesting read, which sets me to >thinking of various things. > >ssssssssnnn > >At 10:45 AM 1/6/2006 -0500, Ed Foote wrote: >>David writes: >> >><< I think those who use an ETD tune unisons without it because it's faster.<< >> >> Damn right. Consistant unisons might sound alike, but upon closer >>measurement, we find the three strings all over the place on certain >>notes. This is >>the "Weinreich" effect. Simply stopping all strings to the SAT will leave a >>very inconsistant bunch of notes,(at a recording/concert level of >>examination). >> I usually let the SAT tune the outer strings of a trichord, then use my >>ear to settle all the phase requirements as I drop the middle string into the >>mix. It lets the organic quality of my judgement have the final say in the >>fastest time possible. Some notes, I ignore the machine and place >>everything by >>ear, since the box will occasionally get confused. >> >> >>Though tuning unisons in the bass can sometimes be problematic with an >> ETD, >><< >> >> I agree, aural unisons in the bass are faster because you are going >>to have to aurally check wherever the machine puts the notes, anyway! >> >> >> >>And for the very high treble, an ETD for tuning unisons can be quite >>useful. >> >> >>Becomes more true every year... >> >> >> >>Ed Foote RPT > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives > > >-- >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.1.371 / Virus Database: 267.14.14/222 - Release Date: 1/5/2006 > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna@yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-539-0716 or 1-888-29t-uner
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