I find that when I tune P12ths all the way to the top it's just a bit too much stretch--except maybe on a concert instrument where I'm aiming for a bit of an upward curve all the way to the top. When I tune aurally and measure that upper octave seems to want to end up somewhere between a slightly narrow P12th and pretty well stretched 2:1 octave. David Love www.davidlovepianos.com -----Original Message----- From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Richard Brekne Sent: Monday, June 15, 2009 2:30 PM To: caut at ptg.org Subject: Re: [CAUT] String Coupling / SB and Bridge stiffness Don M. Really... I have a hunch that an awful lot of aural tuners have been using something very close to a P-12ths stretch for a very long time. I keep running into a heavy reliance by many on tests and controls for setting octaves that result in either a P-12th in between double octaves... or something very very close to it.
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