On January 22, 2008 JD wrote: ---- big snip --- All the compression mark does is slightly reduce the compression and render the board unsightly. For makers to claim that a compression mark is a good thing and a sign that they've done their work properly is, to me, nonsense. It's like a waitress claiming she pours a good cup of tea because some of it always ends up in the saucer. --- big snip --- John: When a sounding board has a compression ridge that is a spot where the integrity of the board - as a single piece - has been compromised. That is also the place that will open up as a crack when low humidity arrives. However, a direct quote from the new Steinway World-Wide Technical Reference Guide: "A Note about Soundboards: "An important feature found in the Steinway is the design and installation of the soundboard. This system is manufactured in such a way that it is constantly under compression, which prevents the soundboard from relaxing. It is for this reason that compression ridges may occur. Compression ridges are a cosmetic indication that the soundboard has simply absorbed moisture from the atmosphere. "Compression ridges are in no way considered by Steinway to be a concern as to the piano's performance or a defect in the craftsmanship of the instrument. In fact, the presence of such ridging is a result of a well-seasoned and properly designed and installed board as it adapts to certain environments and climate conditions. By design the Steinway soundboard is under compression and tightly fit to the rim of the piano. This system of compression is a key component in producing the richness and beauty of the Steinway tone. As a result, compression ridging can occur as the piano becomes acclimated to or changes with its environment and the soundboard absorbs moisture. This ridging does not mean that the board is cracked. The opposite is true. The board is under tension and functioning as it should. Also, if there is no separation between the board and the ribs under the board this is an indication that both board and ribs are functioning as a homogeneous unit producing the unique tone of the Steinway piano. This ridging is not something new to Steinway. It has been documented and addressed in Steinway documentation since the late 1800s." So, since compression ridges are so wonderful, should I be disappointed in the 26 Steinways that we have that lack this feature? dave ____________________ David M. Porritt, RPT dporritt at smu.edu
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