Duaine... I think what everyone is trying to tell you is that there really is no such thing as a <<pure>> octave. Nor is there any non relative definition of stretch. All octaves in pianos are stretched one way or the other. Our sense of pureness varies from person to person and has to do with just what "stretch" degree we as individuals find most pure/pleasing. Cheers RicB Example: how can checking C3 and C4 to be "pure" and "stretched" at the same time. Duaine -- Duaine Hechler Piano, Player Piano, Pump Organ Tuning, Servicing & Rebuilding
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