On an upright I encountered, there was a wood/metal buzz on the bass notes. It turned out that the block had separated from the back so the strings were too close to the action and the bottom of the damper levers were buzzing on the strings. A symptom which might indicate this problem would be extremely late-lifting dampers. Regards, Jon Page, piano technician Harwich Port, Cape Cod, Mass. mailto:jonpage@comcast.net ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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