The victim of a horror attack following a Christchurch music festival has been interviewed by police after regaining her voice.

Amelia Rayner, 29, was punched in the throat when she and her boyfriend were leaving Electric Avenue at Hagley Park just after 11pm on February 25.

She had an operation to have a metal plate inserted into her throat to help her breathe. Her family was worried about how it could affect her voice.

But her mother, Barbara, told The Star yesterday Amelia was talking and doing "really well".

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She said hearing her daughter speak for the first time following the incident was "just wonderful".

"We've been very, very lucky. She's just got a bit of healing to do."

It is alleged Ms Rayner and her boyfriend were leaving the festival when they got into an altercation with four men.

The men allegedly assaulted her boyfriend, and when she stepped in to help, was punched in the throat crushing her trachea.

It has been reported police had interviewed a man believed to have caused her injury, but no charges had been laid.

Detective Senior Sergeant Mark Worner said police interviewed Ms Rayner on Wednesday morning. But he would not give any details about how it went.

"Inquiries are ongoing."

Barbara Rayner said her daughter did not remember much of what happened.