John Weldon "JJ" Cale (December 5, 1938 – July 26, 2013) was an American guitarist, singer, and songwriter. Though he avoided the limelight, his influence as a musical artist has been acknowledged by figures such as Neil Young, Mark Knopfler, Waylon Jennings, and Eric Clapton, who described him as one of the most important artists in rock history. He is one of the originators of the Tulsa sound, a loose genre drawing on blues, rockabilly, country, and jazz.

In 2008, Cale and Clapton received a Grammy Award for their album The Road to Escondido.

Cale was born on December 5, 1938, in Oklahoma City, Oklahoma. He was raised in Tulsa, Oklahoma, and graduated from Tulsa Central High School in 1956. As well as learning to play the guitar he began studying the principles of sound engineering while still living with his parents in Tulsa, where he built himself a recording studio. After graduation he was drafted into military service, studying at the Air Force Air Training Command in Rantoul, Illinois. Cale recalled, "I didn't really want to carry a gun and do all that stuff so I joined the Air Force and what I did is I took technical training and that's kind of where I learned a little bit about electronics." Cale's knowledge of mixing and sound recording turned out to play an important role in creating the distinctive sound of his studio albums.

Along with a number of other young Tulsa musicians, Cale moved to Los Angeles in late 1964, where he found employment as a studio engineer as well as playing at bars and clubs. Cale first tasted success that year when singer Mel McDaniel scored a regional hit with Cale's song "Lazy Me". He managed to land a regular gig at the increasingly popular Whisky a Go Go in March 1965, where club co-owner Elmer Valentine rechristened Cale as JJ Cale to avoid confusion with the John Cale in the Velvet Underground. In 1966, while living in the city, he cut a demo single with Liberty Records of his songs "After Midnight" with "Slow Motion" as the B side. He distributed copies of the single to his Tulsa musician friends living in Los Angeles, many of whom were successfully finding work as session musicians. "After Midnight" would go on to have long-term ramifications for Cale's career when Eric Clapton recorded the song and it became a Top 20 hit. Cale found little success as a recording artist. Not being able to make enough money as a studio engineer, he sold his guitar and returned to Tulsa in late 1967. There he joined a band with Tulsa musician Don White.

In 1970, it came to his attention that Eric Clapton had recorded Cale's "After Midnight" on his debut album. Cale, who was languishing in obscurity at the time, had no knowledge of Clapton's recording until it became a radio hit in 1970. He recalled to Mojo magazine that when he heard Clapton's version playing on his radio, "I was dirt poor, not making enough to eat and I wasn't a young man. I was in my thirties, so I was very happy. It was nice to make some money." Cale's version of "After Midnight" differs greatly from Clapton's frenetic version, which is itself based on Cale's own arrangement:

The history on that deal was, the original "After Midnight" I recorded was on Liberty Records on a 45-rpm, and it was fast. That was about 1967-68, maybe 69. I can't remember exactly. But that was the original "After Midnight", and that is what Clapton heard. If you listen to Eric Clapton's record, what he did was imitate that. No one heard that first version I made of it. I tried to give the thing away, until he cut it and made it popular. So, when I recorded the Naturally album Denny Cordell, who ran Shelter Records at the time, and I had already finished the album, he said, "John, why don't you put 'After Midnight' on there because that is what people recognize you for?" I said, "Well, I've already got that on Liberty Records, and Eric Clapton's already cut it, so if I'm going to do it again I'm going to do it slow.

It was suggested to Cale that he should take advantage of this publicity and cut a record of his own. His first album, Naturally, released on October 25, 1971, established his style, described by Los Angeles Times writer Richard Cromelin as a "unique hybrid of blues, folk and jazz, marked by relaxed grooves and Cale's fluid guitar and iconic vocals. His early use of drum machines and his unconventional mixes lend a distinctive and timeless quality to his work and set him apart from the pack of Americana roots music purists." His biggest U.S. hit single, "Crazy Mama", peaked at No. 22 on the U.S. Billboard Hot 100 chart in 1972. In the 2005 documentary film To Tulsa and Back, Cale recounts the story of being offered the opportunity to appear on Dick Clark's American Bandstand to promote the song, which would have moved it higher on the charts. Cale declined when told he could not bring his band to the recording and would be required to lip-sync the words.

Really was produced by Audie Ashworth, who would go on to produce for Cale until 1983. Cale's second album further developed the "Tulsa sound" that he would become known for: a swampy mix of folk, jazz, shuffling country blues, and rock 'n' roll. Although his songs have a relaxed, casual feel, Cale, who often used drum machines and layered his vocals, carefully crafted his albums, explaining to Lydia Hutchinson in 2013, "I was an engineer, and I loved manipulating the sound. I love the technical side of recording. I had a recording studio back in the days when no one had a home studio. You had to rent a studio that belonged to a big conglomerate." Cale often acted as his own producer / engineer / session player. His vocals, sometimes whispery, would be buried in the mix. He attributed his unique sound to being a recording mixer and engineer, saying, "Because of all the technology now you can make music yourself and a lot of people are doing that now. I started out doing that a long time ago and I found when I did that I came up with a unique sound."