Traveling the nation to discover little-known performers for the Arhoolie label, which he founded in 1960, he earned a nickname: El Fanático.

Chris Strachwitz, who traveled in search of the roots of American music with the eagerness of a pilgrim, discovered traditional musicians with the skill of a detective, promoted their careers with the zeal of an ideologue and guarded their work with the care of a historian, died on Friday at an assisted living facility in San Rafael, Calif. He was 91.
The cause was congestive heart failure, his brother, Hubert, said.
Mr. Strachwitz (pronounced STRACK-wits) specialized in music passed down over generations — cotton-field music, orange-orchard music, mountain music, bayou music, barroom music, porch music. The songs came not only from before the era of the music industry but even from before the existence of mass culture itself.
Like other leading musical folklorists of the modern recording era — among them Moses Asch, Alan Lomax and Harry Smith — Mr. Strachwitz rescued parts of that history before they vanished.
But the extent of his devotion and the idiosyncrasy of his passions defy comparison.
Mr. Strachwitz was the founder of Arhoolie Records (the name comes from a term for field hollers). In addition to recruiting his own artists, he did his own field recordings, music editing, production, liner notes, advertising and sales. In the company’s early years, he affixed the labels to the records and mailed them himself.
He was a lifelong bachelor who said that having a family would have thwarted his career. On his journeys around the country to record new music, he had for company a manually operated orange juicer and 20-pound bags of oranges. The targets of his search included a highway grass cutter, a gravedigger and a janitor, all of whose musical talents were at the time basically unknown.
He emigrated from Germany after growing up as a teenage count under Nazi rule and went on to explore the fullest reaches of American pluralism. He took an interest not just in the standard roots repertory of folk and blues, but also in norteño, Cajun, zydeco, klezmer, Hawaiian steel guitar, Ukrainian fiddle, Czech polka and Irish dance music, among countless other genres.
To account for what united his passions, Mr. Strachwitz said he liked music that was “pure,” “hard-core” and “old-timey,” particularly if one of the musicians had a “spark.” His language grew more colorful when he defined his type of music negatively.
“It ain’t wimpy, that’s for sure,” he said in a 2014 documentary about him. The movie took its title from Mr. Strachwitz’s ultimate insult, which he used to refer to anything that he considered commercial, artificial and soulless: “This Ain’t No Mouse Music!”
Image
The first Arhoolie record, released in 1960, was “Texas Sharecropper and Songster,” by the blues singer Mance Lipscomb. Mr. Lipscomb’s music had never been recorded, and the new release v