---------------------- multipart/alternative attachment Something I've learned as a piano student, player, and technician, is that in order for an upright action to operate properly, one must play firmly to the bottom of the keystroke. Not loudly, necessarily, but firmly. If you don't, bobbling can be a problem, not to mention non-repeating notes from jacks hanging up on hammer butts. I have to demonstrate this to many a mother and father from whom I've received that urgent call saying, "Timmy says that there are a few notes sticking." Which just happen to be the notes he uses in the one piece he knows how to play. The day of the original post, I tuned an M500 Yamaha, which was the original piano in question I believe. I could make the hammers bobble at will, but if I played them correctly, the action worked fine. It's important for teachers to understand this about upright actions, but most of them really don't. Just my 440 herz, Dave S. In a message dated 11/3/2005 11:20:30 A.M. Pacific Standard Time, ricbrek@broadpark.no writes: Hi At just past half blow on the upright piano the jack should already sufficiently in motion that by the time the hammer evntually would bounce back on a slow (but realistic) keystroke the butt should be able to push it out of the way. If it cant, then there isnt really all that much that can be wrong. Either its not out far enough for this to happen, ie. a regulation issue, or something is preventing it from moving out easily enough... ie. some resistance in the action. I've run into a few Steinway K's and Z's with this problem and I've solved it every time by a good regulation and appropriate spring strenghts. That said... Crescendo punchings wont really help me thinks in as much as one of my earlier attempts was to simply increase key dip 1 mm with no real change in the double strike at soft play. I think (not know) this is because one really isnt playing with all that great a technique in the first place and that the situation is bordeline relative to the technique of the pianist. That said again... there are all kinds of good reasons otherwise for useing Crescendos... so buy em :) Cheers ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/dd/52/ae/db/attachment.htm ---------------------- multipart/alternative attachment--
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