Inharmonicity Challenge

[Frank Weston]

Robert Scott wrote:
> 
> Here's a puzzle that some of you may enjoy.  As we all know,
> inharmonicity is usually discussed in terms of its effect
> when using electronic tuning aids.  But suppose you went
> back in time 200 years.  Using only the technology of the
> time, devise a demonstration of inharmonicity in an ordinary
> piano.  You do not have to measure it precisely, just show that
> it is not zero.  Can you do it?
> 
> Bob Scott
> Ann Arbor, Michigan

Tune A4 to a 440 fork, Tune A6 to a 1760 fork. Play A4 and A6
simultaneously.  Note the beats.

Frank Weston