Definatley Chamber size .The Tone is a bit like QLSO Strings but Horizon Chamber strings is about the right size and will have the slides (porta.). Kirk Hunter might also have that tone...or wait for the QLSO Pro update for chamber size and tone..Rich
Definitely not quartet, but could be as small as 2,2,1,1 but sounds more like 4,2,2,1. The nearest sounding thing I've got is my own 2Vn lib! The nearest commercial thing is VSL chamber strings (6Vn) but it's really too big and you don't get the vibrato detail. You might get closer by playing different sustain articulations of VSL solo strings seperately on different tracks to produce the small sections.