A particularly well-known example of live use is the Billy Joel Super Bowl XLI national anthem: http://www.youtube.com/watch?v=G8smRRyoYGc http://www.youtube.co

A particularly well-known example of live use is the Billy Joel Super Bowl XLI national anthem: http://www.youtube.com/watch?v=G8smRRyoYGc http://www.youtube.com/watch?v=G8smRRyoYGc The main problem with auto-tuning live is that you're just trading the pitch control for everything else - intonation, vibrato, etc. Exposing that "robot sound" ends up being another way to screw up your performance, and so there's no way to cheat. You still need to be an excellent singer to get close to the studio-perfected sound. (If you're in the studio, of course, you can do overdubs, and you can use the more sophisticated Auto-Tune competitor Melodyne, which uses batch processing to allow smoother and more detailed corrections including pitch, rhythm and timbre, and in the most recent versions, chord manipulations.)