The X Factor has cancelled its public vote after the show was hit by sound issues on Saturday night.
Viewers complained that the judges and some of the performances sounded distorted and contestants sounded like "Daleks".
ITV apologised and said the vote will take place on Sunday's show instead.
It is thought to be the first time voting has been cancelled in the singing show's 15-year history.
Viewers started to encounter sound issues during the performance by Danny Tetley and continued through Anthony Russell's song.
A message appeared on screen which read: "We are sorry for the temporary interference in sound."
At the end of the programme, another message said: "Due to a technical issue, tonight's vote has been cancelled. It will open in tomorrow night's show."
The show was not live and had been pre-recorded on Saturday afternoon, so host Dermot O'Leary did not refer to the sound problems.
On social media, viewers called for ITV to call off the voting.
This is so not fair. If Danny and Anthony go home tomorrow, it's not their fault. DO SOMETHING ABOUT THE AUDIO!!!! It's horrendous. #xfactor— Anya (@anyaaellis) November 3, 2018
Surely the votes need to be halted. We can’t hear them sing properly. It’s not fair on them. @TheXFactor— Claire Jones (@flump23) November 3, 2018
TV presenter Phillip Schofield, who hosts This Morning, wrote: "Oh no!!! They're all Daleks on the X Factor!!!!!"
One person joked that the X Factor needed some throat sweets.
And others said they had changed their TV channel, thinking the sound problems were related to their own televisions, or thought it was a special effect for Halloween.
"I thought my TV had finally given up on me after eight years but it's just X Factor" one viewer wrote on Twitter.
How many people changed the channel to see if there was a problem with their TV? 🙋🏻♀️ #XFactor— Sinead (@SineadKennnedy) November 3, 2018
I thought they were doing the robot effect for Halloween but nah 😂😂 #Xfactor— lewis aitken ☃️ (@basicallylewis) November 3, 2018
An ITV spokeswoman said: "We apologise for the technical issue that affected the sound on part of tonight's episode of The X Factor. We are investigating why this happened.
"We can confirm tonight's public vote has been cancelled and will instead open in tomorrow night's show at 8.30pm on ITV."