Inharmonicity - so what actually causes it ?

[Newton Hunt]

.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