Court documents have revealed further details of the alleged sexual and physical abuse of three young boys by people linked to a performing arts school in regional New South Wales, including on Anzac Day in 2016.

In charge sheets obtained from the court, police allege the boys were repeatedly abused between 2014 and 2016.

Police will allege that on April 25, 2016, two women aged 58 and 29 raped two of the boys, who were aged four and seven at the time.

Police also accuse the 29-year-old woman of making the two boys perform a sex act with each other that same day.

Both women are accused of physically abusing those two boys on April 25, 2016.

The exterior of the performing arts school in regional NSW. ( ABC News: Kathleen Calderwood )

Seven people to plead not guilty

Seven people — four women aged 58, 29, 26 and 20, two men aged 52 and 18, and a 17-year-old girl — have been charged and are all connected to the regional arts school. They intend to plead not guilty.

Bryan Wrench, the lawyer representing them, on Tuesday told a court there was "another side" to this story.

The group remain behind bars, ahead of a bail application next week.

The school's headquarters was yesterday deserted, with rubbish strewn around its exterior and half-finished pottery projects visible inside.

There are a total of 127 allegations against the group, including one in which police claim blood was taken from the young boys, who were then forced to drink it.

Equipment can be seen inside the performing arts school in regional NSW. ( Supplied )

The documents detailed several other occasions where the accused would allegedly have sex with the boys in the company of one or more of the others.

The charges against the 58-year-old also include deprivation of liberty, detaining for gratification and intimidation.

The 29-year-old woman is facing eight charges, while the 23-year-old is facing 13 charges.

The 52-year-old man is not accused of sexually abusing the boys, but is alleged to have witnessed three sexual assaults and has two charges in relation to filming them.