Because for an explanation or theory to have any meaning, it has to be consequent in dealing with the phononema it attempts to explain. There are too many cases where this particular theory doesnt hold up. You can tighten a loose pin without solving the problem, you can experience a clean string with absurdly loose pins. The <<sometimes>> effect of tightening a loose pin or putting pressure on it points (at least me) in another direction. If the tight pin theory is really valid, then in nearly all cases... if not all... a false beat will occur when a pin is loose and it will be eliminated upon tightening the pin. Since this is quite clearly, for not to say obviously not true... then the theory has a major problem. There is no doubt something that changes sometimes when manipulating the pin/pin hole relationship in various fashions. But it I dont think its even close to been really shown that its simply a matter of the pin being loose. Not by a long shot. Cheers RicB --------------------- If applying CA glue or a screwdriver sometimes helps, how can you not buy the loose pin theory at all? Short of a defect in the string itself (which can and does happen) false beats are almost always due to poor terminations and can occur on either side of the speaking length. I imagine a scientific explanation is not complicated though most of the evidence is empirical. It is also true, however, that a loose pin will not always cause a false beat. It would depend, I assume, on the pin's ability to move freely. The fixes mentioned below, while they might help, don't always because they may not adequately address the problem. David Love davidlovepianos@comcast.net <mailto:davidlovepianos@comcast.net>
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