Hi All,  Perhaps I'm just 'out of the loop' or 'behind the times' with
regards to electronic tuning devices.  Is there an electronic tuning
device that tells the tuner when he has a unison correctly tuned?

How about one that correctly interprets the overtones in the sub-bass
register of a spinet piano?  How about one that interprets the
overtones in a piano with very flat hammers?  (Especially those in
the treble region.)

Mind you, I use an electronic tuning aid, but it's just a reference
tool, not an end-all or be-all. I believe that any tuner 'worth his
salt' does most of his tuning (over 50%) by ear.  And considering that
the average piano has some 250 strings, I'd venture to say that on
average at least two-thirds of the strings are tuned aurally.

So, does a piano tuner have to have good hearing?  Personally, I think
that's a no-brainer: _Yes!_

Also, I'd be curious to hear from piano tuners about whether they
ever spend the time to teach a customer how to tell if a temperament
is correctly set.  What's the old saying; "An educated consumer is our
best customer..."

Musically,

John A. Tuttle
Player-Care.com
Brick, NJ, USA