Hi Jimmy,
Happy to hear that you like it.
You can use your libraries as you like, those are independent libraries that complement each other very well. As explained in the videos and on the website, a few articulations (some shorts, trills, tremolos, pizzicato...) have been taken from Synchron Strings I, apart from that, it's all new recordings.
We have poured everything we have learned from the successful Big Bang Orchestra Series into the recordings of Synchron Strings Pro, with a focus on playability and an economic footprint, while establishing musical possibilities that simply were not available before.
Synchron Strings I has more dynamic depth in terms of velocities, but it was quite a different recording approach back then.
We believe that we are getting closer to the demands of modern composers with this new approach.
Best,
Paul
Paul Kopf Product Manager VSL