Dan Morgenstern, a revered jazz journalist, teacher and historian and one of the last jazz scholars to have known the giants of jazz he wrote about as both a friend and a chronicler, died on Saturday in Manhattan. He was 94.

His son Josh said his death, in a hospital, was caused by heart failure.

Mr. Morgenstern was a jazz writer uniquely embraced by jazz musicians — a nonmusician who captured their sounds in unpretentious prose, amplified with sweeping and encyclopedic historical context.

He was known for his low-key manner and his humility, but his accomplishments as a jazz scholar were larger than life.

He contributed thousands of articles to magazines, newspapers and journals. He served the venerable Metronome magazine as its last editor in chief and Jazz magazine (later Jazz & Pop) as its first. He reviewed live jazz for The New York Post and records for The Chicago Sun-Times, as well as publishing 148 record reviews while an editor at DownBeat, including a stint from 1967 to 1973 as the magazine’s chief editor.

His incisive liner-note essays won eight Grammy Awards. He was named a National Endowment for the Arts Jazz Master in 2007 and received three Deems Taylor Awards for excellence in music writing from the American Society of Composers, Authors and Publishers, two of them for his books “Jazz People” (1976) and “Living With Jazz” (2004). He was involved — as a writer, adviser, music consultant and occasional onscreen authority — in more than a dozen jazz documentaries. Most decisively, he served from 1976 to 2011 as the director of the Institute of Jazz Studies at Rutgers University-Newark, elevating the institute into the largest repository of jazz documents, recordings and memorabilia in the world.

“I don’t like the word ‘critic’ very much,” Mr. Morgenstern often maintained. “I look at myself more as an advocate for the music than as a critic,” he wrote in “Living With Jazz.” “My most enthusiastic early readers were my musician friends, and one thing led to another. What has served me best, I hope, is that I learned about the music not from books but from the people who created it.”

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