Lou Donaldson spent seventy years being told he was two different musicians, and he never accepted the distinction. He arrived in New York in 1949 as a Charlie Parker disciple and left the music in 2018 as the man who had made "Alligator Bogaloo." Between those two points he did not change instruments, technique, or approach. He simply stopped apologising for playing the blues.

He was born in Badin, North Carolina, a small aluminium-company town, on November 1, 1926. He studied at North Carolina Agricultural and Technical State University in Greensboro in the early 1940s, and in 1945 he was drafted into the United States Navy, where he played clarinet before being accepted into the Great Lakes Navy Band outside Chicago and switching to alto. Chicago is where he first heard bebop, and it settled the question of what he would do next.

He moved to New York in 1949 and signed with Blue Note in 1952. His first recordings that year were with Milt Jackson and Thelonious Monk, and his first date as a leader, "Lou's Blues," followed in November 1952. Two years later he was standing at the center of hard bop: on February 21, 1954 he played the Birdland engagement that produced Art Blakey's A Night at Birdland, with Clifford Brown on trumpet, Horace Silver on piano and Curly Russell on bass, recorded by Rudy Van Gelder. He was 27.

The turn came gradually. Swing and Soul in 1957 put Ray Barretto's congas next to Herman Foster's piano and let the R&B pull show. A year later the same band made Blues Walk, recorded July 28, 1958, his eighth Blue Note album and the record most often handed to a newcomer. Nothing on it is complicated. It plays Parker's vocabulary at a tempo you can dance to and lets the blues carry the structure. Producer and broadcaster Bob Porter gave him the nickname "Sweet Poppa Lou" around this period, for a ballad tone that stayed warm no matter how hard the up-tempo playing got.

From 1957 he also worked regularly with organist Jimmy Smith, and the alto-plus-Hammond format he learned there defined the next twenty years of his own records. Here 'Tis in 1961 was the first organ-combo album under his own name, and it carried Grant Green on guitar, a year after Donaldson had suggested Green move to New York.

That talent-scouting became the second thing he is known for. Grant Green's New York career started on Donaldson's recommendation. Big John Patton's recording career started on Donaldson's sessions, first the May 9, 1962 date that became The Natural Soul, then a January 24, 1963 session long enough to yield both Good Gracious! and Signifyin'. Organists Billy Gardner, Charles Earland and Leon Spencer Jr. all came through his bands. So did Dr. Lonnie Smith, whose first Blue Note appearance was on a Donaldson record.

He left Blue Note in 1963 for Argo and Cadet, making Signifyin', Possum Head, Cole Slaw, Rough House Blues, Musty Rusty and Blowing in the Wind across four years, including one large-ensemble date arranged and conducted by Oliver Nelson with Phil Woods in the saxophone section. Then he came home.

On April 7, 1967, at Van Gelder Studio in Englewood Cliffs, New Jersey, Donaldson booked a session with Melvin Lastie on cornet, Lonnie Smith on organ, a 24-year-old George Benson on guitar and a New Orleans drummer still billed as Leo Morris, later known as Idris Muhammad. He ran three minutes short of material and was told to play anything to fill the tape. The riff he invented on the spot became "Alligator Bogaloo," the title track, and the biggest record of his life. The album entered Billboard's Top LPs chart in the issue dated October 7, 1967, ran eleven weeks, and peaked at No. 141, his first charting album in four years.

What followed was the most commercially successful and most critically argued stretch of his career. Mr. Shing-A-Ling (1968) carried his cover of Bobbie Gentry's "Ode to Billie Joe," whose drum break by Idris Muhammad became one of the most sampled pieces of recorded sound in hip-hop, turning up under tracks by A Tribe Called Quest, Lauryn Hill, Kanye West and Eminem. Midnight Creeper (1968), Say It Loud! (1969), Hot Dog (1969), Everything I Play Is Funky (1970) and Pretty Things (1970) pushed further into James Brown territory, with Donaldson increasingly playing an electric Varitone alto. He recorded for Blue Note through 1974, closing the run with the strings-and-ballads record Sophisticated Lou (1973), the studio-band Sassy Soul Strut (1973) and Sweet Lou (1974), the last featuring Cornell Dupree and Bernard Purdie.

Critics called the Varitone period watered down. Donaldson's answer, given to the Washington Post, was five words long: "Hell, the people bought it so we made it."

Two albums for Atlantic's Cotillion imprint in 1976 and 1977 went further toward vocal-led soul than anything else in his catalog. Then he pulled back to acoustic quartet and quintet playing, on Poinciana (1979), Sweet Poppa Lou (1981), Forgotten Man (1982) and Back Street (1982), before a gap of several years.

The return, when it came, was an argument. Play the Right Thing, recorded December 19 and 20, 1990 for Milestone with Lonnie Smith on organ, Peter Bernstein on guitar, Bernard Purdie on drums and Ralph Dorsey on congas, carried liner notes making an explicit case for soul jazz as a serious idiom rather than a commercial embarrassment. He was 64. Birdseed (1992), Caracas (1993) and Sentimental Journey (1995, his only Columbia album) followed with Bernstein on all three. His last album as a leader, Relaxing at Sea: Live on the QE2, was recorded aboard the Queen Elizabeth 2 in November 1999 with Lonnie Smith, Randy Johnston and Nicholas Payton guesting on two tracks.

He was inducted into the North Carolina Music Hall of Fame in 2012 and named an NEA Jazz Master in the 2013 class, alongside Mose Allison, Lorraine Gordon and Eddie Palmieri. He gave his last performances in 2017 and declared himself retired in 2018.

The final recognition arrived with almost no time to spare. On October 30, 2024, Jazz at Lincoln Center inducted him into the Ertegun Jazz Hall of Fame, two days before his 98th birthday. He passed away eight days after that birthday, on November 9, 2024, in Daytona Beach, Florida, of pneumonia.

Donaldson's playing began as an unusually faithful reading of Charlie Parker. Blue Note's Alfred Lion signed him in 1952 specifically because the label wanted someone who played like Parker, and the earliest records deliver exactly that: fast, articulate bebop lines with a clean, centered alto tone.

What separated him from the rest of Parker's students was the tone itself. Where Parker's sound was piercing, Donaldson's was rounded and vocal, closer to Johnny Hodges in its ballad register. That combination, Hodges' warmth carrying Parker's vocabulary, is the whole basis of the "Sweet Poppa Lou" nickname and the reason his blues playing never sounded like a compromise.

From roughly 1957 onward he narrowed his repertoire deliberately toward blues forms, standards taken at dancing tempos, and later straight R&B and funk covers. The organ trio became his default setting, and he built each band around a Hammond player and a guitarist rather than a piano-and-horn front line. In the late 1960s he added an electric Varitone attachment to the alto, which thickened and blurred the sound and remains the most divisive choice in his discography.

The constant across all of it is that he kept improvising. Even at the height of the funk records, the solos are real solos, built on bebop harmonic thinking, played over grooves borrowed from the pop charts. That is precisely the line separating him from the later smooth-jazz radio format his records are sometimes filed beside.