Looks like I failed to mention that I was mainly thinking 51" uprights to 5 1/2 foot grands. At 07:38 AM 11/27/00 -0800, you wrote: >----- Original Message ----- >From: "Stephen Airy" <stephen_airy@yahoo.com> >To: <pianotech@ptg.org> >Sent: November 27, 2000 1:59 AM >Subject: Re: restringing question > > > > I see. It's just a matter of personal preference -- I don't like my > > monochords to extend above A13 or my bichords to hit C28. :) At the > > lowest I like my bichords to hit G11 or F9 (C4 in a Bosendorfer >Imperial -- > > don't know if it's like that) and I like the trichords to extend down to > > C28, B27, or A#26 (some have them down to F21 or lower maybe -- I happen >to > > like the tone at A25 and down that you get with wound strings). > > ------------------------------------------------------ > >Both of these are a function of scale length. That is, what is appropriate >for a concert grand is not appropriate for a 160 cm grand, or a 110 cm >vertical or a 132 cm vertical. > >In general, in a longer the piano both plain wire tri-chord unisons and >bi-chord unisons can run further down in the scale. > >In a smaller piano, unless there is particularly wide string spacing, the >physical characteristics of the string -- overall diameter and space needed >for them to vibrate without impacting neighboring strings -- will often >dictate where the transition must be made. We have encounter several pianos >in which proper scaling could not be achieved with bichords because the >original spacing was so close that the wires would probably impact on hard >blows. > >If the scaling is done correctly you should hear no difference at all >between mono-chord wrapped strings and bi-chord wrapped strings in a piano >of reasonable size. And the acoustical anomalies at the bass/tenor break >are more often the result of poor soundboard and bridge design than of >string scale design. (Assuming, of course, that the string scaling was done >correctly. In most existing pianos, it is not.) > >Del _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com
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