Is this a physical impossibility?

[Richard Moody]

>
> Hi Christopher,
>                 Complex question, but historical temperaments could to
> be a good place to start your exploration.  Recently had a mind boggling
> experience with Beethoven and the Vollati/Young temp, as did a group of
> 36 professional teachers.
> Regards roger
>
What was the mind boggling experience?  Lemme guess. After all the effort no
one could tell the difference?  ---ric   ; )