DAC and real musical instruments

[Ingo Debus]

jhaible wrote:
> I have no real piano, so I may be wrong. Can someone tell us how large,
> preferably expressed not in percentage but in beat rate, how large the
> deviation
> of a typical streched tuning piano and a "perfect" instrument that would be
> playing along, is ?

The user's manual of my Yamaha CP-70B electric grand piano includes a
tuning curve. It says -13 cents for the lowest key (E0, if middle C =
C3) and +20 cents for the highest key (E6). 

Too lazy to calculate the beat rates now :-)

Ingo