Answer: autotune

AnswerCrossword Clue
AUTOTUNEMusical tool on Time's list of "50 Worst Inventions"
AUTOTUNEPitch-correcting audio processor
AUTOTUNETool needed to fix Justin Bieber
AUTOTUNEPitching machine?
AUTOTUNECorrection for a wild pitch
autotunesoftware which corrects out of tune music