David, I have used Dan Franklin's duplex tuning methods on two pianos. I find the benefit to be mainly in the clarity and richness of the sound. It enhances some of the overtones and reduces some of the harshness, but to some extent I suppose it might also add to power and sustain. I think it is mainly an enhancement rather than a corrective procedure. If there is a problem with sustain, I would look elsewhere. To the extent that the problem might be in the duplex area, I would be more inclined to suspect the front duplex rather than the back, to look at bearing problems in either area and other usual suspects. Is the piano new? Old? Rebuilt? What is its general condition? What about the strike point? Sometimes a small adjustment there can make a difference. Paul Larudee David Ilvedson wrote: > List, > > I have a Baldwin D with poor sustain in killer octave and am looking for > ways to improve it. I am interested in the duplex tuning claims of > improved sustain. Any input would be appreciated. > > David I.
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