Hej list I thought about... I have seen experienced people tapping with the palm on a soundboard ready for restringing, claiming they could distinguish between good and bad respons. When refitting a plate after soundboard-repair I often ask myself: is there a crown? and only one crown? could it be negativ somewhere? I always try to make a reasonable downbearing, but as we know every man has his favourite digits and no concensus is near and most statements are in mm which makes no sense to me unless a measure of the arm is supplied. We believe that a certain relatively small downbearing on every point on the bridges is optimum, but agree on, that zero down-bearing at a string does not mean zero tone there and negative (or uppbearing :-) ) means a tone too on that place (phase-shifted??) why so? If the crown on the named instrument is inferior or negativ, then I try to establish a decent downbearing all the same. We intuitively know the difference between crashing an egg from the inside contra the outside and the difference between an arched bridge contra a suspension bridge... My questions is this: Is there a qualified difference in "tonal responce" from a positive to a negative crowned soundboard, which could be explained in terms of the forces involved? Given the bridgepins stays in there holes and the strings don't creep up the pins, there seems to be symmetry in the forces if we give the "negative crown board" a "negative downbearing"? Regards -- Pianoshop Leif Olsen Member Of D.P.I.F. Denmark http://www.image.dk/~leifo
This PTG archive page provided courtesy of Moy Piano Service, LLC