Vocalise with opera vocals as in Darren Porter - Terraforming

Hello,br
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I’m a little bit lost in how to get a vocalise sample with opera-like vocals for a breakdown of my track. Something just similar to that one in Darren Porter - Terraforming.br
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Never worked with any vocals previously, so don’t even know whether such samples are usually taken from sample pack or recorded especially for the track. Looked through the forum on this case and those links to vocal sample sites like freevocals.com, but didn’t manage to find anything like this.br
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Does anybody have any idea on what’s the usual way to get such type of vocal samples?

Spectrasonics omnisphere has so good choir type sounds although this sounds like its from a sample pack.

Thank you very much for suggestion, Phil!br
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I happen to find something similar in some arbitrary opera sample packs (Gotchanoddin seem to sound good for me, for example). Didn’t try to use it yet, but hope that after some voice tuning it would suit well.br
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But anyway, yes, starting to save my money for Omnisphere :slight_smile: