Ali Akbar Khan

Ustad.

Mr. Khan, who was named a national treasure by the Indian government in 1989, carried on the musical traditions of his father, Allauddin Khan, whose ashram in East Bengal produced some of India’s most celebrated musicians, notably Mr. Shankar, the flutist Pannalal Ghosh and the sitarist Nikhil Banerjee.

Unlike his father, a volatile and uneven performer, Mr. Khan maintained an austere demeanor onstage while coaxing passages of extraordinary intensity from his sarod, an instrument with 25 strings, 10 plucked with a piece of coconut shell while the remainder resonate sympathetically.

“He was not as flashy as Ravi Shankar, but he had the ability to play a single note, or a simple passage of notes, and draw out such amazing depth,” said John Schaefer, the host of “New Sounds” and “Soundcheck” on WNYC-FM in New York. “That’s why he was able to get a world of emotion and color out of ‘Malasri,’ which is often called a three-note raga. That, for me, stands as the calling card of the genius of Ali Khan.”

The violinist Yehudi Menuhin, who brought Mr. Khan to the United States in 1955, called him “an absolute genius” and “the greatest musician in the world.”