Hi Paul, A properly tuned octave is a matter of taste. I have one client who prefers 2:1 octaves on her entire piano. I accomodate her wishes. Of course, all the other partials are contracted from where most folks want to hear them. At 10:42 PM 11/13/2009 EST, you wrote: > > > I shouldn't but... There is still vast confusion in the use of the >phrases "pure octave" and stretch. All properly tuned octaves are slightly >wider at some coincident partial, so stretched. You choose the coincident >partial set of your liking. I am not familiar enough with machines to >speak to how they treat octaves in the midrange, but it is evident and >calculable that as you go deeper into the bass and higher into the treble, >the octaves stretch more. There is no such thing as a "pure" octave; there >will always be some coincident partial set beating. P Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna at yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-539-0716
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