Hi all, See if this helps. I've a tech question about distortion or overtones that are undesirable. I service an old rebuilt M&H BB...a nice instrument. Down in the lower tenor close to the break there is a "noise" that sometimes sounds like an extraneous buzzing but on close examination seems to be more firmly a part of the piano. I wonder sometimes if it has to do with the torsion bars underneath. It is predominate on one note in particular. It's not in the hammer or voicing. How are those torsion bars torqued or tuned? I'm not thinking of messing with them...just want to know. I believe it's something to do at the time of building/rebuilding...like setting the plate. I am way off? I just tuned a S&S D for a concert last night - pretty great piano and new. I noticed that the last tenor note just before the break had a rather noticable bad overtone noise - for want of a better discription. I'm quite sure it was not from the duplex area or a problem at the agraffe. I put these two problems together as the noises are not that different from each other. This is to the best of my memory. Comments?
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