David writes: << The problem, I believe, lies in the fact that they are programmed to select a certain partial (or in the case of the VT a certain balance of partials). But frequently, those need to be fudged a little. This is most obvious at the tenor break where inharmonicity spikes up and in order to keep a good thirds progression, the notes often need to be tuned a little flatter. >> Greetings, Hmmm, This suggests that the pianist will be more sensitive to the evenness of the thirds than other intervals, and I have not always found that to be the case. On smaller pianos, I often need to let the thirds lose that perfect progression of decreasing beat rate speeds in order to maintain the same sound to my octaves as they pass over the bass break. I have never had a pianist complain about this inconsistancy, but when I was getting a smooth decrease in the thirds (which the SAT will usually do), at the expense of the octave, I did get complaints,(sometimes). The problem tends to show up an octave below this break when that "fudging" requires even more flatness to keep the single octave acceptable and then the double octave has a noticeable roll to it. Within tolerances, I think the eveness of the thirds is more for the aural tuners benefit than the pianist's. It seems to be most useful in checking the accuracy of ET, but beyond that, it makes little musical difference,(again, within tolerances). I don't know of a pianist alive that could tell that, say, F#-A# is beating the same speed as the adjacent G-B or F-A, especially at the slow speeds found in the 3rd octave. It is simply below the threshold of perception unless one is specifically trained AND looking for it. All of the above applies to ET. Since I have found so many customers that greatly prefer a more "Victorian" ET than an absolute clinical one, I don't worry about sacrificing the thirds progression in ET before I compromise any of the others. There isn't anything particularly musically magical about 13.7 cents wide. Regards, Ed Foote RPT http://www.uk-piano.org/edfoote/index.html www.uk-piano.org/edfoote/well_tempered_piano.html
This PTG archive page provided courtesy of Moy Piano Service, LLC