As Jeffrey mentioned, the vocal you're referring to (the chants and the female soloist) are both part of EVOLVE. To clarify- the chanting is user created, whereby a host of single syllable notes are at your disposal. Users can create super convincing, menacing vocal assaults really quickly, and that blend well with percussive beds.
We balanced that vocal anchor with a pair of really beautiful female vocalists, recorded separately. We went with a more eclectic approach, capturing legato along with more obscure performances in a host of various key signatures.
There's actually no vocal loops in the EVOLVE collection.
Thanks for the compliment on the Demos. I generally tell people to "Let your ears be the judge." Of course, with so many incredible tools on the market today, it's understandable wanting to take their time in making the decision to invest in any significant tool for your craft.