Hi JD, How else could a string exhibit negative inharmonicity other than through coupling to the bridge/soundboard/plate? Direct measurement shows that negative inharmonicity does exist. It just doesn't happen very often. Also humidity levels affect inharmonicity--and last time I checked steel is not affected by moisture in any way except that it will rust if the moisture level is too high. Therefore I conclude that inharmonicity *is* affected by the bridge/soundboard (and possibly the plate as well) It may also be affected by the hardness of the hammer--though I don't have any measurements to confirm that. I suspect that the changes that Roger Jolly did at conventions were a change in the amplitude of a particular partial making an octave "out of tune" because a different partial was louder. That would not necessarily indicate a change in inharmonicity. Inharmonicity is also changed by "setting" the strings and bridge pins. The authority I quote for the above statements are my own direct measurements before and after and the history in my database of FAC numbers over many years and changes of season. At 08:15 AM 2/5/02 +0000, you wrote: >At 4:32 PM -0600 2/4/02, Don wrote: >>Hi Ric, >> >>Inharmonicity *is* affected by the bridge/sound board. > >Oh. Do you mean by the conditions at the termination or more than >that? Please tell us what authorities will confirm your declaration. > >JD > > >
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