Thanks Ron. I am not actually looking to purchase an ETD as I am too close to retirement, and I am still managing to do a reasonable concert tune. Just the question of the stretch that has always been a bone of contention amongst my peers. It has always been a 'matter of opinion', which is not quite perfect tuning IMO. Best regards, David ----- Original Message ----- From: "Ron Koval" <drwoodwind at hotmail.com> To: <pianotech at ptg.org> Sent: Monday, May 28, 2012 10:54 PM Subject: [pianotech] Stretch in tuning " 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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