Inharmonicity - so what actually causes it ?

[Alan W Deverell]

Many thanks to Gary for raising the initial question and to Newton +
Jim + Conrad etc. for your answers - I have placed these all in a
folder and we merge all the points for future reference - good stuff
chaps - did not see any MORE questions added though - I do have more
:-))) but another day perhaps - in the meantime how about analyzing
string motion with strobe lighting (I was preparing to do this about
10 years ago - ran out of time/money) - see my NEW posting.

Just one further question for the moment:

My observation/understand was that the energy in the vertical
vibration, of a imperfectly supported string, is converted into
CIRCULAR (not horizontal as stated below), secondary, motion and that
this exaggerates/exacerbates inhamonicity. Is this true ?

Thanks again - AlanD (trying to shine a light on the strings so he can
see)

>-----Original Message-----
>From: owner-pianotech@ptg.org
>[mailto:owner-pianotech@ptg.org]On Behalf
>Of Newton Hunt
>Sent: Friday, August 14, 1998 5:11 AM
>To: pianotech@ptg.org
>Subject: Re: Inharmonicity - so what actually causes it ?
>
>
>.termination add/contribute to the effects of  inharmonicity ?
>
>No, and yes.
>
>Given that terminations, notching and tight bridge pin then no
>terminations does not have an effect on Inh.  On the other
>hand if the
>bridge is not properly notch you can have two planes of
>vibration, one
>vertical and one horizontal.  Improperly notched strings can
>therefore
>have separate lengths, causing a false beat and pitch change when
>changing from one plane to another and therefore a pitch
>change can have
>a very minor effect on Inh.  ALmost unmeasurable but calculable.
>
>Loose bridge pins will also cause false beats and therefore
>may change
>the inh.
>
>In terms of tuning the problem is the false beat, not any changes in
>inh.
>
>        Newton
>        nhunt@jagat.com
>
>