1) is that it is layered sound, playing in minor 3rds Ab-Cb - A-C
2) it seems to sample based sound that is not otherwise messed with, however the length of the sustained portion of the sample is created on the fly (i.e. by looping that small portion until the key is released), giving an unnatural quality to the sound
suggest something like Reasons nnxt trumpet trio for doing this or anything similar in teh kontakt family, could also look into miroslav philharmonick and garritan personal orchestra, although this really does sound like a cheap soundfont or even someone playing a few notes with the articulation they like and then a quick and nasty mapping into anther sample playback unit