Les Noces

[Newton Hunt]

Take FACs from each piano, average them together and tune them all to
that set of numbers.  I have had to do this a number of times and
although you will notice some variations in tune values on one or two of
the pianos they will sound fine even played as solo instruments.  The
variations are not that audible.

As to Jim Kennear's question; yes you have been missing issues of some
consequence, namely inharmonicity.  This is not an issue if all you have
been doing is tuning pianos with no problems but when you tune two or
more pianos together the differences between the pianos can make a hugh
difference in results.  Finally if you do any rebuilding you need to
understand inharmonicity so you can do a job well.

Do a search in the archives on that term and you will find more than you
ever need to know on the subject. :)

		Newton