The composer said that he couldn't watch the BBC One show, as most of the hopefuls sang "out of tune".
"I don't know what the problem was there. Everyone was out of tune all the time," he told the Radio Times.
"I just couldn't watch it. Unfortunately, I have perfect pitch - it's either one of the great advantages or the greatest affliction in life.
"When people sing out of tune, I just can't listen."
After fronting five BBC talent shows in the past, Webber has now moved to ITV1 for his new series Superstar, which aims to find the lead in a new production of Jesus Christ Superstar.
He added that he has banned his judging panel of Jason Donovan and Dawn French from using talent show clichés.
"What I really, really want to do is to sit down with everyone and tell them that there are certain reality show clichés and I think we ought to have a gong system," Lord Lloyd Webber added.
"I'll gong us out if anyone says, 'You've had a fantastic journey', or, 'Although you've lost, I'm sure we're going to hear from you again'."
Hosted by Amanda Holden, the auditions for Superstar launch this Saturday (July 7) at 7.25pm on ITV1.
Watch the trailer for Superstar below: