User blog comment:Voidorchestra/A more human feel, using Layering/@comment-3076833-20130827165131/@comment-32500188-20130827205455

It's possible from what I've tried out before. I've played around with layering the same vocals with different gender and brightness settings, and ended up with some interesting results in timbre.

(Also, I believe Quicktime is required for those examples to work. Using that on my end and not having an issue so far.)