---------------------- multipart/alternative attachment Greg, It is plain to me from the work I did on the Seiler that there is a noticeable difference when the dampers lift later. I did a downweight check on a few keys, and the difference was around 5-6 grams. The thing that made me consider doing it at all was this: some pianos have tricord dampers with fingers that extend far below the level of the string. This creates a fair amount of friction. It's easy to find by pushing the key slowly. Compare keys with over-long tricord dampers to keys with blocks. Big difference in feel! It was obvious to me from that observation that dampers indeed play a role in key touchweight. I experimented with a few consecutive dampers before I did the whole piano, and did a blind test with two of the store salesmen. I had them try two contiguous white keys, one with adjusted lift, and one before adjustment. We could all feel the difference, especially with pianissimo playing. It may not be the ideal solution for a heavy touchweight, but given that the piano hadn't been sold yet, I didn't want to do something that would have been more difficult to reverse. Thanks for the input, Dave Stahl a message dated 7/30/05 12:15:27 AM Pacific Daylight Time, grahampianos@yahoo.com writes: Does damper timing impact touch at normal playing speeds? (We are talking about grand pianos here). My chapter held a lengthy technical last month on touchweight. The dampers were lifted by the pedal when using gram weights on the keys to check up and down weight, thus eliminating damper weight from the equations. Someone asked the instructor about the effect of the dampers. The answer was: "The touchweight we feel at normal playing speed is mostly inertial, getting the hammer and shank up to speed. By the time the key hits the damper underlever, inertia of the key does the work of lifting the dampers, the hammer is moving close to full speed, the initial inertial load has dropped, and you hardly feel the damper at all." Inertial effects and "real" touchweight at playing speeds are much harder to measure than slow-motion or static weights, so we rely on our sense of touch. I'm not sensitive enough yet to feel small differences, so I have a hard time proving or disputing the claim above. In light of our very detailed analysis of the action we worked on, hammer weight and key leading are the first things to check, and the easiest to change, if an action is too heavy (assuming friction and geometry problems have been ruled out). Dampers didn't make it to the top ten. Damper timing does have a significant effect on the ability to play legato or staccato. Early lift makes it easier to play legato. Some jazz pianists prefer a late lift for lots of separation, articulation, or "bite". At least that is the opinion of a few of our chapter's more senior techs. Sounds reasonable to me. Greg Graham PTG Associate Member, Lehigh Valley PA (written and tech exam passed, tuning yet to go) ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/c3/d6/37/14/attachment.htm ---------------------- multipart/alternative attachment--
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