@Some Dude Nah, those orchestral samples you posted are far out of our reach as
Well, those are not samples, it's entirely synthesized in real time via physical modeling.
The magic is done mostly by the breath controller that allows the player to impart the proper expression that, in addition to the idiomatic ornamentation and articulation, makes a flute sound like a flute (which is otherwise a relatively uncomplicated stack of sine waves).
Obviously there is no way in hell Holopainen is ever going down that route - but why would he, when you are in Nightwish you can afford to hire a few wind players
The entire thing was made on a computer with sampled instruments.
Programming any sort of credible-sounding performance on a computer is a breeze, if you know a thing about orchestration (and/or the musical idiom you are trying to recreate, for non-european music).
Playing a single instrument's parts live, with two hands, on a keyboard, is an entirely different matter.
Usually more difficult, as it requires programming the synth engine to reproduce the various registers of the instrument and and physically having enough controllers - pedals, wind controllers, aftertouch - to impart the proper articulation (and training oneself to do that!).
Note that despite what Native Instruments wants you to believe it's not - well, it's never - about having a hundred gigabytes of samples.
I did not want to derail the thread anyway, just pointing out that Ahas' claim that synthesizers can't sound like a credible flute hasn't been true for years now
I bet Pip Williams is rearranging all the songs as we speak. And I have the big big feeling it's not going to be a hits tour but one dedicated to "obscure songs". Brace yourselves for The Carpenter slaying all your faves again.