By Archana Ram
August 24, 2010 at 07:35 PM EDT

X Factor judge Simon Cowell has banned the use of performance-enhancing software on the U.K. series after allegations swirled that a contestant’s voice was tweaked using Auto-Tune. Production admitted to using the technology to improve some contestants’ singing, make contestants with a slim chance of advancing sound even worse. Cowell reportedly placed the ban to maintain the integrity of the competition series, which will air a U.S. version on Fox beginning in fall 2011. Reps for the network could not be immediately reached for comment.