Yunupingu, the former lead singer of Australian band Yothu Yindi and one of the country’s most famous Aborigines, has died aged 56.

He... expressed very strongly his culture in all parts of the world

His death was announced by Australian Prime Minister Julia Gillard.

Yunupingu, who gained worldwide fame in the 1980s and 1990s with his hits Treaty and Tribal Voice, died at his home in a tiny Outback Aboriginal settlement in the Northern Territory, Indigenous Health Minister Warren Snowdon said.

Officials have not released a cause of death, but Yunupingu struggled for years with kidney disease.

“We have lost a uniquely talented musician, a passionate advocate for Aboriginal people and a truly great friend,” Gillard said in a statement.

Yunupingu began his career as a teacher, and became the first indigenous Australian to be appointed a school principal.

He developed what he called the “both ways” educational philosophy, which used both Western and Aboriginal teaching techniques.

His penchant for blending cultures carried over to his music career, with the formation of his band Yothu Yindi in 1986.

The group included both Aboriginal and white musicians and won fans with a unique combination of traditional indigenous sounds and modern pop and rock.

Yothu Yindi went on to tour the US and Canada as a support act to Midnight Oil and toured Australia with Neil Young.

The band’s most famous song, Treaty, was written in response to an unrealised promise then-Prime Minister Bob Hawke made in 1988 – the bicentennial of European settlement in Australia – to sign a treaty between the Government and Aborigines.

In 1992, Yothu Yindi performed the song in New York at the launch of the UN’s International Year of the World’s Indigenous People.

“He was able to lead a band that performed and played its songs and expressed very strongly his culture in all parts of the world,” Education Minister and former Midnight Oil frontman Peter Garrett said.

“His legacy is immeasurable but the loss is great.”

Yunupingu was named the 1992 Australian of the Year for his role in “building bridges of understanding between Aboriginal and non-Aboriginal people”.

In recent years, he was forced to undergo dialysis three times a week as he struggled with kidney disease.

In 2009, Yunupingu told Australian television that he had battled alcoholism before he was diagnosed. Alcohol was not the direct cause of his kidney failure, but worsened his other health problems.

Yunupingu is survived by his wife Yalmay and six children.