Kristinn Leifsson wrote: > > Speaking of better unisons, > > why is it that the right string in a three string unison, is more often > than not the one with the least false beats? Does it ??? I used to think so but I am not convinced anymore of this. Seems like when I really start taking notes and counting which strings do what it ends up being much more random as to which strings have false beating. > And why does one sometimes have to touch up the right string (again more > often than not) in the last check of the tuning? Try reversing or changing the order of which side you tune first. You might find a change in this as well. > > Always wanted to know that. > > Kromeo Iceman > > At 08:19 16.6.2000 -0800, you wrote: > >Ron, > >Interesting! Do you suppose that wire size changes, minute differences of > >strike point or shape of the string at the termination point could cause the > >different results? That is only a few posibilitys. > >I do not know where this statement comes from but " the theory of three, > >any three tones sounding together closely in tune will sound in tune." > >This is why I choose to tune one string to a target point and the other > >strings one at a time to the target string. The results are most of the > >time, but not always, a better unison. > >Joe Goss > >----- Original Message ----- > >From: Ron Nossaman <RNossaman@KSCABLE.com> > >To: <pianotech@ptg.org> > >Sent: Friday, June 16, 2000 5:52 AM > >Subject: Ghosts of impedance past, and yet to come > > > > > > > Hi Gang, > > > Anyone remember my fevered speculations about the possibilities of the > > > reported pitch drop from a single string to a two or three string unison > > > possibly being related to the soundboard/string impedance match/mismatch? > > > Well, it just got stranger. > > > > > > Tuning the Kimball grand I'm finishing up, I set Tunelab going so I could > > > watch what a unison's pitch did as I progressed. I spent most of my time > >in > > > the top half of the scale. Some unisons dropped slightly, some stayed the > > > same, and some climbed in pitch as the second and third strings tuned in. > > > It was about an even three way split on probability, with no obvious order > > > or grouping as to position in the scale. The changes in the timing of the > > > attack pitch climb and drop back to dwell pitch were every bit as erratic > > > as the dwell pitch change. Some unisons that hadn't changed as the second > > > and third string tuned in, tended to climb slightly in pitch in decay. > >Some > > > dropped. > > > > > > Thinking I might have some control of the process by where I centered the > > > tuning of that second string, I played with it a bit within that area just > > > sharp or flat of dead-on to the first string - where you can wooly up the > > > attack a little without leaving a noticeable roll in the unison. Some > > > unisons seemed to be slightly steerable, some not. My favorites were the > > > unisons that went sharp as the second string tuned in, even when the > >second > > > string was still a beat low. > > > > > > In most cases, the addition of the third string took the climbers a little > > > higher, the droppers a little lower, and left the non changers non > >changed. > > > The only reasonably dependable effect I found was that the attack phase > > > pitch climb tended to shorten in duration with the addition of each > > > string. It was interesting watching the attack phase of the unisons that > > > climbed in pitch. The single string envelope profiled about like that of > > > any other single string. Adding the second string, the attack pitch climb > > > seemed to be less than with the single string, but rose to maximum dwell > > > pitch in a second or so. > > > > > > So far, no answers, just more and different effects than others are > > > reporting. I'll tape off the back scale and play with it some more this > > > weekend. That will probably just add another layer of unaccountable > > > weirdness, but I might get lucky too. > > > > > > Later, > > > Ron N > > > -- Richard Brekne Associate PTG, N.P.T.F. Bergen, Norway
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