Hello ,
Could tiny cracks have developed at the joints of the support
beams under the piano and between inner and outer rim? We've had good
success in some older smaller grands turning the piano upside down, and
filling these cracks with CA glue. This strenghtened the structure and
resulted in a better sustain particularly in the treble. The sustain
was not much longer but stronger/fuller during the after sound. I have
never attempted this on a concert grand but it's just a thought.
-Mike Jorgensen RPT
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