This thread is very interesting, especially the bit about accordions not being tuned to concert pitch throughout the range because they sound better like that.

I say this because I own a Technics digital piano, which is supposed to be bang on concert pitch throughout.You can change the pitch by just pressing a button of course, and also transpose, change it from concert grand sound to upright, electric piano, etc.

Now I don't know if it's my age, hearing or whatever, but the upper registers, when the piano's set to concert grand sound, don't always sound quite in tune.

As these things aren't supposed to vary over time and obviously don't need a piano tuner, could this be caused by the over-ruthless application of absolutely constant pitch by digital means? I understand that people like the Royal Academy of Music use these pianos so surely not but......