I have been asked by a pianist to voice out an attack sound she hears in the bass. The best that I can describe the sound is that it is like the chiff a pipe organ makes with the note starts. I have heard this sound many times before in other pianos of different makes but have never been able to solve the problem. This is the first time that a pianist has brought it up. It is not string leveling or hammer to string mating, shank and hammer glue joints are good, pinning is good, shape of hammer looks good. I have tried switching out the hammer and shank with other notes that don't have the sound and it follows the hammer. Another technician suggested that the hammer has been over voiced and to use a couple drops of acetone and keytop on the strike point. This gets rid of the chiff sound but then to note is too bright. When I lightly file off the crust and needle the surface to even out brightness the sound returns. I would appreciate any suggestions. Bob Bussell
This PTG archive page provided courtesy of Moy Piano Service, LLC