Well, the strings sound like samples for sure to my ear once they get into the rapid bowing. The winds don't though, what little there was sounded very convincing. But I vote samples. Couldn't say what lib.
It's a bit lazy for a real performance but still rather nice. I've played that one in an orchestra and there is more excitement in the beginning even if it starts from pianissimo (if my memory serves me right).
I'm with Fred on this one There is so much noise it is difficult to hear, but I say the whole thing is samples. However, if the noise could be reduced about 70-80% it would be much better. If it is samples, very nice job! If it is all live, then the recording engineer needs to find the A/C controls and shut off the air conditioning before recording starts
The fast repetative strings are the one thing that points to samples.
I threw in the pink noise to hopefully throw people off. I got the idea because I had a live recording of this piece, but of course the intro is at ppp, so I had to boost the volume in Sound Forge to hear it.. and when I did boost it, I was hearing a lot of hiss. So I emulated that.
GOS incudes some hall ambience samples- just the background noise of the room, the occasional litttle cough and chair squeak- that is very effective for adding the effect you're talking about when used judiciously. Does VSL have anything like that included?