This is to follow up on the bass string buzzing on a Grotrian grand. Thanks to the gentleman who sent the suggestion about moving the bridge pins. That seemed to have fixed the problem. We removed the two pins on the bass side of the trichord, filled the holes with epoxy, and redrilled the holes creating enough space for the strings not to collide on a heavy blow. Again, thanks very much. It was a revelation. Bob Callaghan
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