I think I've got a handle on this now... There's nothing pure in OnlyPure, just a declaration: "For inharmonicity related instruments, pure means the state, where the sum of the beats is minimal." Ok, I'm following... kindof the Virgil Smith "whole tone" approach to tuning octaves. (By the way, the Verituner is able to replicate this using the balancing multi partial approach in the custom style function) Which EDT will you be "facing" in your European demonstration? But the key idea seems to be using inside and outside fifths along with the octave for placement. If you search on this list, there used to be a technician named Bill Bremmer (the ONE who must not be named!) that tunes only optimizing temperaments, namely the equal beating victorian temperament. In any non-equal temperament, there will be a varience of beat speeds of the fifths. He used this to temper the octaves as well to come up with the same effect you speak of. In tuning the octaves he would balance the beatspeed of the tempered fifth- any one - with the beatspeed of the octave. He also stated that this was a viable method for tuning ET, but since the fifths were all tempered evenly, the octaves wouldn't end up tempered - yet using the guidance of all of the fifths and octaves together, he described the "sheen" he got with this tuning method. But music is more than just octaves and fifths.... you could complete the journey and move on to the thirds and sixths. In equal temperament, the ratio between the beats of a minor third and a major third in a closed triad is 1.7. That is for every beat of a major third, the minor third will be beating 1.7 times. Now by using alternate temperaments, this can be adjusted to get a consonant 1.5, or 3/2 ratio. That's a sound not to be missed.... Ron Koval Chicagoland
This PTG archive page provided courtesy of Moy Piano Service, LLC