Australia's Disability Discrimination Commissioner hopes a Federal Court hearing on Monday will force RailCorp to act over faulty audio systems on trains.

Commissioner Graeme Innes, who is blind, has lodged more than 60 complaints about inaudible train announcements.

Mr Innes says vision-impaired people rely on the announcements because they can't read information displayed on boards.

A hearing began in the Federal Magistrate's court in Sydney on Monday morning after mediation between Mr Innes and RailCorp failed.

Before the hearing, Mr Innes told reporters he was hopeful there would be a breakthrough.

"I'm hopeful," he told reporters outside court.

"If it doesn't, then the discrimination law in Australia needs to change because it won't have worked as it should."

Mr Innes said intransigence from RailCorp meant money was being wasted on court costs instead of being used to improve train announcements.

"I don't understand why we're here today. I'd prefer that the money being spent on this court case was spent on fixing up the trains so we've got more announcements," he said.

Mr Innes said he had even been unsure where he was on the train on the way to court on Monday morning because he couldn't make sense of the announcements.