It is fair to say that piano technicians DO know how to tune with
key color and that Victorian temperaments enable them to do so.
One of the best is the Moore temperament which permits key color
and will slide by as equal if you don't talk about it.  But the
pianos sure do sound better!

Deviation in cents from equal

C   2.50      Moore & Moore
C#  0.00
D   1.50
D#  1.00
E  -1.50
F   2.00
F# -0.50
G   3.00
G#  0.50
A   0.00
A#  1.50
B  -1.00


Chart:  www.mdi.ca/hhuestis/welltune/moore.xls
        www.mdi.ca/hhuestis/welltune/moore.pdf


For a little more spice:

C    5    "Broadwood Best" from Avery list
C#   0
D    3
D#   3
E    0
F    5
F#   0
G    5
G#   2
A    0
A#   4
B    0

Chart:  www.mdi.ca/hhuestis/welltune/broad-b.xls
        www.mdi.ca/hhuestis/welltune/broad-b.pdf

Chopin preludes played on this temperament are incredible.

Try it, you'll like it!

Herb