The documentary follows the journey of 130 young singers during their time with Moorambilla Voices and the festival.

The story airs on the ABC at 7.40pm on Sunday.

This year is young Dubbo singer Hannah Barker's third year in Moorambilla Voices and she was thrilled to hear she would be on the small screen.

"When I first found out I said 'Oh my God I'm going to be on TV,'" she said.

"We were told not to look at the camera and just sing."

Choral conductor Michelle Leonard, founded Moorambilla Voices in 2006 and it has since gone on to win numerous awards such as the 2013 NSW State Award for Excellence in Musical Education.

Ms Leonard travels more than 4000 kilometres to select a choir of 130 eight to 12-year-olds from more than 2000 students from 78 schools in 30 towns.

But this incredible effort is downplayed by the choir's artistic director, who's focus remains solely on the children.

"I'm really happy that the region has a positive story," she said. "It's extraordinary to have recognition and to be recognised nationally."

Ms Leonard teaches the children contemporary, original and demanding music by Australian up-and-coming composers.

Ten-year-old Hannah said she loved performing and Moorambilla Voices had taught her a lot.

"It taught me to improve my singing, but it also showed me I can express my feelings without feeling embarrassed," she said.

Ms Leonard described Hannah as a performer who "lights up the room".