This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Re: Helmholtz and Steinway ----- Original Message -----=20 From: John Delacour=20 To: pianotech@ptg.org=20 Sent: November 19, 2001 1:30 PM Subject: Re: Helmholtz and Steinway Sigh. Now you've gone and done it! I'm going to have to build a = mono-chord and test a bunch of stuff I'm really not interested in right = now. But I am curious. Have you, Del, or you Ron O, ever allowed longitudinal wave = considerations to affect your scale calculations? I think we should be = told. And why is that?=20 Let's just say I worked with the concepts some while at Baldwin. The = scales I worked on then ended up without SyncroTone scaling. The = concepts are perfectly valid. Using Mr Conklin's techniques you are, = indeed, able to design bass strings that control the longitudinal mode = harmonics of the speaking length and cause them to fall on a harmonic = that is not dissident. However, to do so requires making some rather = wild note-to-note jumps in both core wire diameter and wrap wire = diameter that makes it impossible to maintain a smooth tension, power = and inharmonicity curves. The variations in acoustical power and tone = color were more noticeable and more objectionable than were the odd = longitudinal mode harmonics. In the side by side tests we did, nearly everybody preferred the = tone performance of the bass string scaling that did not use SyncroTone = scaling techniques but did maintain smooth tension, power and = inharmonicity sweeps.=20 Del ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/b2/27/75/d3/attachment.htm ---------------------- multipart/alternative attachment--
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