Stranger things have happened. Have a gander at this somewhat hilarious patent illustration filed by Apple:
Abstract: Systems and methods for providing real-time feedback to karaoke users are provided. The systems and methods for providing users with real-time feedback while they are singing karaoke generally relate to receiving the user's vocals, determining whether the user is singing on key/pitch and providing real-time feedback to the user while the karaoke song is being sung. The feedback will be positive feedback if user is
