Hi Chony,
What you need is the 'Data List' of Tyros where on page 48 you'll find :

Master Tune
address (hex) 00 00 00 (-102.4... 0 ... +102.3 (cent)

address 00 00 01 (1st bit3-0 --> bit 15-12)
address 00 00 02 (2nd bit3-0 --> bit 11-8)
address 00 00 03 (3rd bit3-0 --> but 7-4)

I think your idea is not as good as it sounds, because a piano with an 'instable' tuning sounds terrible

What I suggest is : Do some pitch correction on your father's voice.... let's say 50% of what is needed to adjust fully. Now the piano keeps the same tuning and the voice personality stays.
Antares is a nice pitch-correction plugin.




[This message has been edited by Roel (edited 07-31-2005).]