This series is written from published material and its byline claims method rather than credentials, so the sources are listed. They are given as books and categories of material rather than as page citations; where a claim in the text is contested, the text says so at the point of the claim.
Two problems specific to this volume should be stated before the list.
The archive is incomplete and the gaps are not random. A substantial part of this book’s primary material (the free mixtapes of roughly 2005 to 2015) was hosted on sites that have contracted, and a great many of those releases are no longer legitimately available. Where beats were used without licence, the records cannot be commercially reissued at all. So the surviving official record is systematically biased toward the material that happened to be clearable.
And the participants have had good reason to be careful. The chapter on the courtroom describes the practice that makes an artist’s recorded and spoken words potential evidence. What people in this scene have said publicly about their own lives is shaped by that, and any account built on public statements (including this one) inherits the shaping.
On the drum machine. The Roland TR-808’s production history, its commercial failure, and the account of the discontinued transistor are documented in interviews with Roland’s own engineers and in the substantial technical literature on the instrument. Its adoption across hip-hop, electro and Miami bass is covered in this series’ earlier volumes and in the standard histories of those musics.
On Memphis and Houston. The Three 6 Mafia catalogue and the wider Memphis tape scene are documented in the group members’ own extensive interviews and in a growing body of writing on the city’s underground. The Houston scene, including the slowed-mix practice, has its own literature and is set out in Houston Rap and in academic work on the city’s music.
On Atlanta. The most useful general accounts of the city as an industry are the reporting and books produced around the Dungeon Family and LaFace period, and The Rap Year Book and similar surveys for the later decade. The strip club’s role as a test market is documented in a very large body of contemporary reporting, in the clubs’ own public accounts and in the artists’ interviews.
On production technique. The description of 808 tuning, glide, distortion for playback on small speakers, hi-hat roll programming with pitch and velocity contour, and the half-time relationship is standard contemporary production practice, documented in producer interviews, in published tutorials and in the software itself. It is technical description rather than interpretation and can be verified by anybody with the tools.
On the mixtape economy and the 2007 raid. The Atlanta raid of January 2007, the arrests, the seizure and the subsequent dropping of the charges were extensively reported at the time and are matters of public record. The wider mixtape economy is documented in the DJs’ and artists’ own accounts and in contemporaneous trade reporting.
On the beat marketplace. The lease-and-exclusive structure, the pricing and the type-beat convention are visible on the platforms themselves and are documented in producer interviews and in the disputes that have followed. The publishing conventions in hip-hop production are set out in All You Need to Know About the Music Business by Donald Passman alongside the general contract mechanics.
On the contracts and the arithmetic. Recoupment, dealer-price basis, deductions, producer points, imprint stacking and multiple-rights clauses are standard practice and are set out in the same source. Every figure in Movement Four is an illustrative shape or a widely-reported range, not an audited number from any particular contract or invoice, and the text says so. Feature fees in particular circulate as scene knowledge rather than as published data, and are given here as ranges for that reason.
On streaming and consumption. The finding that hip-hop became the most-consumed genre in the United States is from the industry’s own annual consumption reporting. Chart methodology changes are published by the chart compilers.
On lyrics as evidence. The practice is documented across decades of American case law and in a substantial legal and social-science literature; the experimental finding that identical lyrics are judged more harshly when labelled as rap dates to research first published in the 1990s and has been replicated. The California statute of 2022 and the federal bill introduced in the same period are public legislative records. The Georgia racketeering prosecution commenced in 2022, its length, and its resolution by plea agreements in 2024 are matters of public court record. This book states procedural facts and takes no position on the merits of any charge or the guilt of any person.
On convictions, allegations and deaths. Where a person in this book has been convicted of an offence, the conviction is stated as fact. Where allegations have been made, they are stated as allegations with the response where one was given. Where a person has died, the fact is recorded and no circumstances are described. The Astroworld Festival crowd crush of November 2021, the resulting deaths, the civil litigation and the grand jury’s decision not to indict in 2023 are matters of public record and are stated as such.
On chart positions, release dates and personnel. The Billboard archives and the releases themselves. Sales and streaming figures reported by labels or platforms are claims and are treated as such.
Where figures are disputed (what any particular deal contained, what any particular feature cost, how any particular dispute was resolved) the text says so rather than choosing. Those disagreements are not gaps in the record. They are the record.
