Rook,
If the hammers are 'hard' and the tone bright from heavy use, would the
pianist tolarate some modest voicing to reduce the high partials? A little
voicing would be a part of the service routine for a heavy use instrument
like this. This might be a good excuse to meet with the musician to discuss
their voicing preference, and like Ron suggested, put the choice of more
service on their shoulders.
As part of a normal service routine, bringing down the worst offenders
in the most heavely used octaves will lessen the effects of unison drifting.
(This is especially true if the piano is miked.)
Dan Reed
Dalas, Texas
This PTG archive page provided courtesy of Moy Piano Service, LLC