Thanks for your clarification Bernard. I think I mentioned on caut that really the only real unanswered question here is your, what I call, fudge factor. That is to say just how you mix in whatever additional criteria to the basic P12ths concept to your actual software. That bit, for my part, I fully understand your desire to remain secretive about. Best of Luck with the software. I believe I will actually be ordering a copy myself once I get confirmation from other users its glitch free. I'd love to do some side by side comparisons with my own approach. And besides... I have no doubt yours is easier to use. Cheers. Richard Brekne A 3/1 duodecime i mention the 3rd partial of one note with the fundamental of the 12th above. This includes inharmonicity between those two partials but does not mean that that duodecime is aurally pure, as the same is true for a 2/1 octave mentions the second partial of one note to fundamental of the octave above includes inharmonicity between that partials, but that octave is also not an aural pure octave, because of the higher partials. The duodecime used in my tunings is aurally pure (that means slightly expanded beyound the 3/1 definition), as aural tuners who do not distinct between octave types describe purity with a "sweet spot" octave. Bernhard Stopper
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