" 'QLegato' doesn't use intervals? What the hell does it use?"
Nick Phoenix answers this question... kind of... through the Northern Sounds forum:
"QLegato is not interval sampling as in VSL. It is a method of playing, sampling and editing that has never been done before. There is a different technique employed depending on the instrument. It produces attacks identical to those heard in the middle of a phrase. However there is no bending of the note. It sounds like 95% of the legato notes heard in the middle of a phrase. I sampled octave and other slides to take care of moments where a true legato slide is needed. In practice, it is very effective and works well for slow or fast material. And of course it will radically decrease the time needed to make smooth lines. In truth, it has sonic and practical advantages over interval sampling and it has disadvantages. It is not time dependent, so you won't here sucking or fakeness when you play fast, but you also don't get the automatic sliding of the note. You'll have to use specific articulations for that and they will never be as good as if you sampled all of the intervals. You will really like it. It's not just a gimmick. It also has the advantage of immaculate tuning, which is part of it's charm and a blessing for the editors and programmers."
It's interesting. Three libraries -- VSL, East West, and Garritan Strings -- each have their own approach to solving the riddle of sampled legato.