" I understand that ETD build in stretching. Does this facility take into consideration of the idiosyncrasies of the indivual instrument like the human ear? David LawsonLet's go back to the beginning - Yes they do... HOW they do it is up to each machine - and most have some sort of user-control to assist/over-ride the machine to suit the individual technician. The commonly used /piano specific ones all have some way for the machine to take data from the piano to helpcontrol this process. Is that what you were looking for?Ron Koval
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