In a message dated 10/1/2009 11:40:49 A.M. Central Daylight Time, dporritt at mail.smu.edu writes: I’d be interested in how you are evaluating these improvements. If you remove a noisy agraffe from a piano to polish and improve it, you are also putting on new strings. How do you separate the one improvement from the other? I did restring the agraffe sections of a piano earlier this year for just this purpose (i.e. there was nothing wrong with the strings, it was the agraffes that needed to be replaced). The improvement was very noticeable though I didn’t do anything to the new agraffes. I don’t know how I would evaluate the difference between a new agraffe and new-and-highly-refined agraffe. David: This is a research design question that we have been pondering for a good long while. David Carpenter is working with me to see whether we can come up with a suitable measurement system that controls the variables. P -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20091001/e163c211/attachment.htm>
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