[pianotech] Echo issue

[David Boyce]

Matthew, I notice from your photos that the discolouration is severe on 
only the first of the three sections of felt on these bass dampers.

This could mean that only that first section on each damper, is in 
contact with the strings, if the discolouration arises from some 
cehmical reation between the strings and something in the felt.

It's possible, if that's the case, that it is simply this lack of 
complete contact with the strings, that is leading to the "ringing on" 
of the bass strings, and that the chemical discolouration is a 
completely separate issue.

Just a thought.

Best regards,

David Boyce
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