I think some of the voices are from symphony of voices in that playback sampler anyway. There are many options when it comes to vocals and samplers.

Whether each more is chromatically sampled is another story. East West, VSL and other larger choir libraries tend to be.

https://www.vsl.co.at/en/Voices_Complete/Vienna_Choir

This is pretty much the icing on the cake.

pdarg

ORIGINAL: j boy
not free = Dimension Pro

Actually, I have DimPro, and it does not really have any significant vocal samples that I would use.

Just to be certain, in case you missed, the Jacyn and Lauren vocal samples, included in Dimension Pro Factory Library?, they have like 7 categories, over 44 a midi keyboard range, (so I think over 300 different ohhs, ahhs, sighs. etc..), which I guess you could also further transpose, or alter in Melodyne.
 
Cheers
John 

Salsamac
Hello 10 or so years on, any updates to the suggestions?
tia
salsa

LOL, I really have to start checking those OP dates before replying.
(Well, Ueberschall has newer GUI than mentioned, called Elastik, LOL) 
 
Cheers
John

Kev999
Slightly OT. I tried creating some vocal "ahhh" sounds using 3 different vocalists singing just over one octave each. Unfortunately none of them could manage to hold on a note for a long enough time, so I ended up using composites of overlapping clips and some of the results were a bit "phasey".
 
I was inspired to do this after watching the following video about 10CC and how they recorded the song "I'm Not In Love":
https://www.youtube.com/watch?v=Qq7oGenbp2I

Good find!  That is a very interesting video!