2009/5/20 Graham Percival <[email protected]>: > On Wed, May 20, 2009 at 10:48:58AM -0600, Carl D. Sorensen wrote: >> >> I've always thought that pushing against the fingerboard created a fixed end >> to the string, while just touching the string created a node. Perhaps the >> "pulling the string towards the arm" technique creates enough force that it >> functions as the "end" of the string, in contrast to the relatively light >> harmonic touch? > > Yeah; if you pull it gently (and if you're in the right position) > you get a harmonic, but if you pull it more, it drops down to the > "regular" pitch. > > As for the actual physics, I'm not certain whether the > non-harmonic is caused by the extra tension, or the width of the > finger[1], or what. > > [1] if you touch the string lightly, you only have a small area. > But if you pull the string a lot, your finger occupies an arc with > a wider angle (albeit still on the order of 2-3 degrees). This > wider arc will deaden a lot more vibrations than a small-area > touch. >
I think that if you touch slightly trying to get an harmonic, the string vibrates on full length, at both sides of your finger; if you press more, vibrations end on the finger. Not a node here of a longer string, but simply an effective end of the string. -- Francisco Vila. Badajoz (Spain) www.paconet.org _______________________________________________ lilypond-user mailing list [email protected] http://lists.gnu.org/mailman/listinfo/lilypond-user
