Photo: The Canadian Press. All rights reserved.

FILE - In this 1967 file photo, Ravi Shankar plays his sitar in Los Angeles. Shankar, the sitar virtuoso who became a hippie musical icon of the 1960s after hobnobbing with the Beatles and who introduced traditional Indian ragas to Western audiences over an eight-decade career, died Tuesday, Dec. 11, 2012. He was 92. (AP Photo, File)

Ravi Shankar, the sitar virtuoso who became a hippie musical icon of the 1960s after hobnobbing with the Beatles and who introduced traditional Indian ragas to Western audiences over an eight-decade career, has died. He was 92.

The prime minister's office confirmed his death and called him a "national treasure."

Labelled "the godfather of world music" by George Harrison, Shankar helped millions of classical, jazz and rock lovers discover the centuries-old traditions of Indian music.

He also pioneered the concept of the rock benefit with the 1971 Concert For Bangladesh. To later generations, he was known as the estranged father of popular American singer Norah Jones.

As early as the 1950s, Shankar began collaborating with and teaching some of the greats of Western music, including violinist Yehudi Menuhin and jazz saxophonist John Coltrane. He played well-received shows in concert halls in Europe and the United States, but faced a constant struggle to bridge the musical gap between the West and the East.

Describing an early Shankar tour in 1957, Time magazine said "U.S. audiences were receptive but occasionally puzzled."

His close relationship with Harrison, the Beatles lead guitarist, shot Shankar to global stardom in the 1960s.

Harrison had grown fascinated with the sitar, a long necked, string instrument that uses a bulbous gourd for its resonating chamber and resembles a giant lute. He played the instrument, with a Western tuning, on the song "Norwegian Wood," but soon sought out Shankar, already a musical icon in India, to teach him to play it properly.

The pair spent weeks together, starting the lessons at Harrison's house in England and then moving to a houseboat in Kashmir and later to California.

Gaining confidence with the complex instrument, Harrison recorded the Indian-inspired song "Within You Without You" on the Beatles' "Sgt. Pepper's Lonely Hearts Club Band," helping spark the raga-rock phase of 60s music and drawing increasing attention to Shankar and his work.

Shankar's popularity exploded, and he soon found himself playing on bills with some of the top rock musicians of the era. He played a four-hour set at the Monterey Pop Festival and the opening day of Woodstock.

Though the audience for his music had hugely expanded, Shankar, a serious, disciplined traditionalist who had played Carnegie Hall, chafed against the drug use and rebelliousness of the hippie culture.

"I was shocked to see people dressing so flamboyantly. They were all stoned. To me, it was a new world," Shankar told Rolling Stone of the Monterey festival.

While he enjoyed Otis Redding and the Mamas and the Papas at the festival, he was horrified when Jimi Hendrix lit his guitar on fire.

"That was too much for me. In our culture, we have such respect for musical instruments, they are like part of God," he said.