Hi --
SeattleLushStrings (8-41-049) is Super Articulation (S.Art). Yamaha doesn't provide the UVF (Universal Voice File) for Super Articulation voices since YEM cannot edit S.Art voices. SeattleLushStrings are implemented also on Genos1.
Super Articulation voices often use the same samples as the equivalent Mega Voice. There is a SeattleStrings Mega Voice:
Velocity Sample/articulation
-------- ----------------------
1-20 Seattle Strings p
21-40 Seattle Strings mf
41-60 Seattle Strings f
61-80 Seattle Legato
81-95 Seattle spiccato f
96-110 Seattle Spicatto ff
111-120 Seattle Tremolo
121-127 Seattle Glissando down
It's no accident that the Seattle Mega Voice uses eight samples in eight separate elements. A (multi-)sample is assigned to each voice element. Each multi-sample sounds like an ensemble as opposed to an individual section.
Playing SeattleLushStrings on Genos1, I don't hear any evidence of legato, spiccato, tremolo or glissando. I don't hear any other articulations in the built-in voice demo, either.
So, I would guess, SeattleLushStrings is composed of the p, mf and f ensemble multi-samples -- probably three elements.
The structure of the SeattleStrings f voice, however, should give one pause. The UVF for this voice shows five elements with overlapping key ranges for 1st voilins, 2nd violins, violas, celli and contrabass! At least Yamaha provides the UVFs for a few legacy Seattle voices.
Hope this info helps. It ain't straightforward and Yamaha does surprising things.
-- pj