Last week, I tuned a Y.C 213 grand that the pianist had cut some felt to lay directly on the speaking lengths of all the strings. I was surprised to find the sound very natural, not at all tubby. The felt didn't go past the dampers or over the bridge, just on the speaking part. We install a lot of players (QRS), and one common complaint is the volume. We've been installing the foam from Edwards, which works well, but cost about $150. or more. For just a few bucks, try this trick with the felt. I would think about using real wool felt, since moisture might be trapped against the strings. Paul McCloud San Diego
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