In the summer of 2006, Nelly Furtado walked into a session with Timbaland and watched Pink Floyd's The Wall on mute until a melody arrived and she started singing what would become "Say It Right." A few weeks later, Justin Timberlake was in the same building — Timbaland's Thomas Crown Studios in Virginia Beach — with no written lyrics and no fixed direction, and the two of them made "SexyBack" on a dare. Those two records, Furtado's Loose released June 7, 2006, and Timberlake's FutureSex/LoveSounds released September 8, 2006, together constitute the most concentrated expression of a rhythmic philosophy Timothy Mosley had been building for a decade. To understand why those albums hit the way they did, you have to go back to where the whole thing started: a New York apartment, a Jodeci producer, and a mispronounced boot brand.

Timbaland's origin story is inseparable from DeVante Swing, the producer and Jodeci member who signed Missy Elliott's R&B group Sista to his Swing Mob collective in the early 1990s. Elliott brought Mosley and his rap partner Magoo along with her to New York, and DeVante took the young beatmaker under his wing. It was DeVante who renamed him Timbaland, after the Timberland boot he mispronounced, and who gave him uncredited production work on Jodeci's 1995 LP The Show, The After-Party, The Hotel. That apprenticeship taught Mosley how to build a groove that lived in the body rather than the head, how to make a drum pattern feel inevitable. When Swing Mob dissolved in 1995, Timbaland left with the lesson fully absorbed. The following year, he produced the majority of two albums that announced him as something genuinely new: Ginuwine's debut Ginuwine...the Bachelor, which yielded the slow-grinding "Pony," and Aaliyah's One in a Million, which opened with "If Your Girl Only Knew." Both records took hip-hop's fast-paced drum logic and applied it to R&B's honeyed vocal register, and in doing so they blurred a distinction that had seemed structural. Timbaland's revelation, as one critic put it, was that it's all funk one way or another.

The third album from that 1996-97 run was Missy Elliott's Supa Dupa Fly, which Timbaland produced entirely in two weeks for Elektra Records in 1997. That record is the one where the full strangeness of his aesthetic became undeniable: the bird-warbling percussion on "Beep Me 911," the synthetic hydraulics, the way he used vocal samples as rhythmic instruments rather than melodic ones. His trademark sound, as AllMusic described it, featured "stuttering, bass-heavy bounce beats offset by resounding high-end synth stabs," all of it underscored by his own quiet murmuring beneath the track. He was, in the language of the era, a producer whose fingerprints you could hear from the first bar. Entertainment Weekly would write in 2007 that "just about every current pop trend can be traced back to him." That was not hyperbole. It was a production credit.

The road from Supa Dupa Fly to FutureSex/LoveSounds runs through a key relationship that tends to get underplayed: Timbaland and Pharrell Williams both came up in Virginia, and both were briefly part of the same high school crew, Surrounded By Idiots, before their careers diverged. The Neptunes went one direction — spare, synth-driven funk built on the Korg Triton, producing 43% of American radio in 2003 at their commercial peak — and Timbaland went another, leaning harder into polyrhythm, Middle Eastern tonalities, and the physical stutter of his kick patterns. The two approaches defined the sonic poles of early-2000s pop, and between them they reshaped what a hit record was allowed to sound like. When pop artists like Britney Spears and Justin Timberlake came looking for hip-hop's rhythmic authority, both producers were ready. Timbaland had already produced "Cry Me a River" for Timberlake's 2002 debut Justified, co-producing it with Scott Storch, and that collaboration planted the seed for what came four years later.

The 2006 sessions that produced Loose and FutureSex/LoveSounds were, by Furtado's own account in a 2016 FADER interview, essentially continuous. "Loose kind of dovetailed into that record," she said of FutureSex. Timbaland and his protégé Danja produced the bulk of Loose, a record that pulled in dance, R&B, Latin pop, new wave, and Middle Eastern music simultaneously, and the four singles it yielded — "Promiscuous," "Maneater," "Say It Right," and "All Good Things (Come to an End)" — each demonstrated a different facet of what Timbaland could do when given a vocalist with the range to meet him. "Promiscuous" is the joyful one, built on a stuttering back-and-forth between Furtado and Timbaland himself, whose murmured interjections became a signature presence across both albums. "Say It Right" is the eerie one, a minor-key drift that Furtado described as having "a mysterious, after-midnight vibe." Loose sold over 10 million copies worldwide, reaching number one in ten countries. Then FutureSex/LoveSounds arrived on September 8, 2006, debuting at number one on the Billboard 200 with 684,000 first-week units, and produced three consecutive Billboard Hot 100 number-one singles: "SexyBack," "My Love" featuring T.I. — which won the Grammy for Best Rap/Sung Collaboration — and "What Goes Around... Comes Around," the song that started the whole session when Danja played a guitar riff, Timberlake started humming, and Timbaland added drums before a single lyric had been written down.

What Timbaland built across those two records is the clearest argument for why the producer, not the artist, is sometimes the real auteur of a pop moment. The stuttering hi-hat pattern that opens "Pony" in 1996 is structurally related to the one that drives "SexyBack" a decade later. The South Asian tonality he absorbed and incorporated into his productions — the quality that made Supa Dupa Fly feel like it arrived from somewhere outside the existing genre map — resurfaces in the atmospheric pressure of "Say It Right." His vocal murmurs, those barely-there interjections that sit just under the lead vocal, appear on "Promiscuous," on "SexyBack," on "What Goes Around," functioning less as a rap feature and more as a rhythmic instrument. DeVante Swing taught him how to make a groove live in the body. What Timbaland did with that lesson, across thirty years and two continents' worth of radio, was teach a generation of pop music what rhythm could actually do.