<blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;" class="gmail_quote">It's not me that says that. Everything even approaching a credible source that I've been able to find says that is the case. I found hundreds of references to high temperature creep, but nothing saying there is measurable creep at room temperatures and the stress levels in piano strings. ... Replace a string in an already stable piano, and you can get it stable in a week.</blockquote><div> Even so, that pitch drop  has to come from SOMEWHERE. I have heard the same statement that wire "creeping" stretch is physically impossible, and it seems unlikely that the physicists are massive wrong on this.. here is one example of a frustrated physicist ranting about the belief of piano tuners: <a href="http://www.mmdigest.com/Archives/Digests/200204/2002.04.02.08.html">http://www.mmdigest.com/Archives/Digests/200204/2002.04.02.08.html</a> But still, my question stands: on a otherwise perfectly settled, broken in piano, why does a replacement new string drop and drop and drop? Where is it all coming from? Clearly, someone is missing something. </div> Kurt Baxter