this clip is taken from an editing stream a few days ago, and we kinda stumbled upon a cool trick using the built in Pitch Correction and AUPitch plugins in logic. the full stream is here: https://youtu.be/u-ssMr4LpJQ
if you'd like to support me on patreon and get access to more behind the scenes stuff, check out http://patreon.com/andyothling