Dear Keith, Pluck a piano string, then play the same note normaly. If the note sounds better plucked than struck you know there is aproblem with the hammer or action. If the pluck-struck test test produces similar but not very good tones you better start looking at the soundboard, bridges, string terminations, name on fallboard, etc. I learned about this plucking stuff from Dan Harteau RPT who always says,"Listen to the piano. It will tell you what to do." I would guess that plucking to determine sustain only measures the decay. Paul Hornberger RPT Detroit-Windsor Chapter
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