Seems to me like there is some phase shifting going on in both of these videos (at the damper, and at the bridge). I would expect that the unison is quite well in tune, but that the three strings are energized slightly differently (hammer mating?) and/or that complex acoustic coupling at the bridge is causing the motions of the strings to change over time. As I figure it, these videos cover something like a half second in real time, stretched out to 3.5 or 4 minutes of video. More or less 500:1 slow motion effect. Pretty neat! Thank you, Stephen!! ~ Tom McNeil ~ Vermont Piano Restorations In a message dated 2/11/2010 3:30:12 P.M. Eastern Standard Time, radkins at coe.edu writes: Incase some of you rushed over to watch them there is one link that is not correct The video of note 64 damper has an incorrect link, which gives a "file not found error"... it should read... _http://real.uwaterloo.ca/~sbirkett/videos/c64%20damper.avi_ (http://real.uwaterloo.ca/~sbirkett/videos/c64%20damper.avi) and not _http://real.uwaterloo.ca/~sbirkett/videos/d64%20damper.avi_ (http://real.uwaterloo.ca/~sbirkett/videos/d64%20damper.avi) I've sent Dr. Birkett a correction. Is it me, or does that left string of trichord get out of phase as the clip progresses in this clip? _http://real.uwaterloo.ca/~sbirkett/videos/c64%20bridge.avi_ (http://real.uwaterloo.ca/~sbirkett/videos/c64%20bridge.avi) Richard Adkins Coe College Music Department -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20100211/ba160201/attachment.htm>
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