Auto-tune first appeared in the late 1990s and quickly took hold of pop music with its use in Cher’s 1998 hit, “Believe.” She, and other artists, such as T-Pain were responsible for its popularity, its synthetic voice effect in electronic dance music and hip-hop.
Scary, though, is the more subtle use of auto-tune to correct the performance of a less-than pitch perfect singer. A great vocal performance can be accurate and expressive; electronics can often get in the way.