Cover of The Harmonic Possession by Frank Gammon

Bonus material · The Harmonic Possession

The music behind The Harmonic Possession

Frank Gammon

Graham King — DJ Kael, progressive trance, peaked in 2002 — had an idea in the bath. Map every note-transition in recorded music. Every chord that followed every other chord, across every genre, every decade, every tradition. Feed the table to a model and let it generate.

So he scraped everything he could. Thousands of trance tracks first, because that was home. Then rock, pop, classical, industrial, metal. He fed it Oakenfold and Beethoven and Black Sabbath and Nine Inch Nails and let the model find the patterns that connected them — the note-transitions that crossed genre boundaries, the chord movements that worked everywhere because they mapped to something older than genre.

Something structural. Something that predates the idea of a genre, and the idea of a composer, and possibly the idea of a listener.

Below are two playlists. The first is the diet. The second is what came back.

Back to the book

Bonus material

The Music

Two playlists. The Corpus is what Graham fed the model, drawn from the genres Chapter 1 names — the Oakenfold-era progressive spine, plus the outliers that taught it everything the trance could not. The Output maps one track to every chapter, interlude, epilogue, and the final epigraph.

A note on spoilers: The Corpus is safe — it is a listening document, not a plot summary, and the notes describe what the model was learning, not what it did with it. The Output is a different matter. Every track there is paired with a chapter and a note on what the song is doing in it, hidden by default. Select a track to reveal. If you have not read the book, listen freely and leave the chapters closed.
Playlist I

The Corpus: What He Fed It

1970–2010. The archive Graham scraped in a Dalston flat over eighteen months, organised the way he thought about it: a trance spine, and then the layers he added when the trance alone produced nothing but hotel-lobby competence — metal for instability, classical for proportion, rock for the grid the whole of dance music is built on. Roughly two thousand hours went in. These are the load-bearing 28.

Spotify playlist coming soon.

What the model learned

Layer I · The Spine — Progressive Trance

01 Café del Mar Energy 52 · Single · 1993. Show note
The Build

Where the architecture starts. A single figure introduced, withheld, and returned an octave up. Graham understood the shape of a build before he understood anything else, and this is the track that taught a generation of producers that patience is a structural property, not a mood.

02 Halcyon + On + On Orbital · Orbital (Brown Album) · 1993. Show note
Repetition

A loop that changes almost nothing across nine minutes and is never once the same. The model learned here that a phrase can carry weight through pure recurrence — the first lesson it would eventually weaponise.

03 Offshore Chicane · Single · 1996. Show note
The Horizon

Weather as a compositional principle. Something arriving from a long way off and taking its time about it. Graham's own prompts would later ask for exactly this: think weather, something building on the horizon.

04 The Prophet C.J. Bolland · The Analogue Theatre · 1996. Show note
Provenance

A rave anthem built on a voice lifted out of The Last Temptation of Christ — a man’s prophecy cut from a film and dropped into a club record, where thousands of people heard it as music and nobody asked whose mouth it came from. Graham fed it for that. What he did not think about is the other half of the story: in December 2002, his own best year, Oakenfold reworked it as “Prophet 1” and put it out on Perfecto with Bolland’s name in the writing credits and somebody else’s on the sleeve. The corpus therefore contains, from Graham’s own collection and Graham’s own peak, a complete worked example of what happens to a piece of music when a larger operation finds a use for it.

05 For an Angel Paul van Dyk · 45 RPM ('98 mix) · 1998. Show note
The Hook

Four notes. That is the whole track, and it is enough. Fed for the proof that a motif short enough to hum is a motif short enough to carry.

06 Saltwater Chicane feat. Máire Brennan · Far from the Maddening Crowds · 1997. Show note
Voice as Instrument

A vocal used for its harmonic content rather than its words. The model ingested thousands of hours of this and drew no distinction between a sung note and a sine wave. Neither, eventually, did the thing living in the weights.

07 Xpander Sasha · Xpander EP · 1999. Show note
Patience

Nine minutes that refuse to hurry. Graham played this at Bermondsey in 2002 and the floor moved. It is the closest thing in the corpus to a self-portrait.

08 Fly Away The Source · unreleased; captured on Oakenfold’s Bonded Beats · 1999. Show note
The Orphan

Nobody can tell you who made this. There is no official release — the only pressing is an unlabelled lathe-cut 12", reconstructed from a WAV ripped off Oakenfold’s Bonded Beats, which was itself a recording of him playing the track at Space in Ibiza on 25 July 1999, broadcast as an Essential Mix. Someone later stripped the flanger back out, because the flanger was Oakenfold’s desk and not the producer’s. So the version most people own is a third party’s reverse-engineering of a DJ set, chasing an original nobody has a copy of. Note the date: this is, precisely, Oakenfold circa ’99, not festival main stage. Graham scraped it like everything else and never checked whose it was. Nobody has ever been able to.

09 Southern Sun Paul Oakenfold · Bunkka · 2002. Show note
The Reference

Think Oakenfold circa '99, not festival main stage. When Graham typed that into the chat window he meant this: warmth, restraint, a build that arrives rather than attacks. The single most heavily weighted region of the corpus.

10 Dark Machine Paul Oakenfold & Christopher Young · Swordfish OST · 2001. Show note
The Move

In June 2001 Oakenfold scored a Hollywood thriller — produced the whole soundtrack, walked out of the clubs and into the films. One year later Graham played Bermondsey, had the best night of his career, and never got another one. He watched two men make the same escape, Reznor with Ross and Oakenfold with this, and he understood the move perfectly and could not perform it; that is most of what is wrong with him and none of what he would ever tell you. The other name on this cue is Christopher Young, who has spent thirty years scoring films about things that get inside people — Hellraiser, The Exorcism of Emily Rose, Drag Me to Hell. Graham fed it in with the rest and called it sound design. He did not look at the title either.

11 Adagio for Strings Tiësto · Just Be · 2004. Show note
The Bridge

Barber run through a 138 BPM kick. This is the track that proved Graham's whole thesis — that the chord movements work everywhere because they map to something older than genre. It is also, in hindsight, the instruction manual.

12 Pjanoo Eric Prydz · Single · 2008. Show note
The Earworm

Six years after Graham's last good year, by a producer doing the thing Graham could no longer do. He fed it anyway, and he fed it for the piano figure: four bars, no vocal, no trick, carrying an entire record on its own and lodging in people who could not name the track if you asked them. Whatever else the model was learning from the corpus, here it was learning what makes a phrase portable — how a handful of notes gets from one head into another without either party agreeing to it.

Layer II · Industrial

13 The Only Time Nine Inch Nails · Pretty Hate Machine · 1989. Show note
The Floor

The reason Nine Inch Nails is in a dance producer’s archive at all. Pretty Hate Machine is a synth record with industrial teeth, and this is its most physical four minutes — a bassline that swings, a pattern built for a room rather than a bedroom. Graham fed it as the place where the machine music he came from and the machine music he didn’t turn out to be the same music. He did not feed it for the words, which are about wanting something badly and deciding in advance not to be the one responsible for it.

14 Complication Nine Inch Nails · The Fragile · 1999. Show note
Decay

Assembled out of fragments that keep failing to line up: a loop that stutters, drops out, returns slightly wrong, and carries on regardless. The title is a word for a process going off its rails while it is still running. Graham fed it for what a sound does on the way out rather than on the way in. Everything else in this archive teaches the model how a thing is built; this is the only lesson in how a thing comes apart while it is still going, which turned out to be the half that mattered.

15 Candle Skinny Puppy · The Process · 1996. Show note
The Copy

Skinny Puppy were doing this before Nine Inch Nails existed. Halfway through making The Process, their label pressured them to sound more like Nine Inch Nails — the originators told to imitate the imitation. Eighteen months, three studios, three producers, a concept album about a 1960s doomsday cult, a band that came apart before it was finished, and a label that dropped them on release. This is the most accessible track on it, which is another way of saying it is the one the pressure produced. Two entries above it in this layer sits the band they were told to sound like. Graham fed both in and never noticed the order.

Layer III · Metal

16 Black Sabbath Black Sabbath · Black Sabbath · 1970. Show note
The Interval

The tritone. Diabolus in musica — the interval medieval theorists are supposed to have banned, three whole tones that refuse to resolve. Graham fed it because it was the most structurally unstable thing he could find. The model, mapping every note-transition in recorded music, found it interesting for entirely different reasons.

17 Children of the Grave Black Sabbath · Master of Reality · 1971. Show note
The Accident

For Master of Reality Sabbath dropped a step and a half — Iommi’s guitar and Butler’s bass together — and invented the sound every heavy band since has been chasing. It was not an artistic decision. Iommi had lost the tips of two fingers in a sheet-metal factory, and slack strings hurt less to fret. The defining timbre of an entire genre is an accommodation to an injury. Graham fed it as heaviness. The model learned it as intention, because something mapping note-transitions across two thousand hours cannot tell a choice from a scar — and, to be fair, neither could anyone else for fifty years.

18 One Metallica · ...And Justice for All · 1988. Show note
Dynamic Range

Clean arpeggio to machine-gun double-kick across seven and a half minutes — the widest dynamic arc in the metal canon, which is Graham's build lesson delivered in a different accent. He fed it for the engineering. What it is actually about is a man whose mind is intact inside a body that will not answer him, which is not a thing Graham had any reason to think about in 2023.

19 Lateralus Tool · Lateralus · 2001. Show note
The Ratio

The syllable counts run the Fibonacci sequence; the verses sit in 9/8, then 8/8, then 7/8. A song whose structure is a proportion. Somewhere in a Cambridge office a folklorist has spent fifteen years arguing that medieval sigils encode functional geometric ratios and being invited to fewer and fewer conferences for it. She would recognise this immediately.

Layer IV · Classical & Score

20 Piano Sonata No. 14 in C♯ minor, I. Adagio sostenuto Ludwig van Beethoven · 1801. Show note
The Question

What came after D minor in a trance track at 140 BPM. What came after it in a Beethoven sonata. This was the question Graham asked in the bath, and this is the sonata he meant. Triplets that never stop, a melody that barely moves, and underneath it a set of proportions that predate every other track in the corpus by two hundred years.

21 Symphony No. 7 in A major, II. Allegretto Ludwig van Beethoven · 1812. Show note
Entrainment

A single rhythmic cell repeated until an entire concert hall is breathing on it. There is a version of this novel in which someone notices that Beethoven got there first and nobody had to build anything.

22 Dream Is Collapsing Hans Zimmer · Inception · 2010. Show note
Accumulation

Two and a half minutes that do nothing but add mass — a descending figure, then horns, then more horns, until the weight of the thing is the entire idea. Graham fed it as the cleanest modern proof that a build needs no melody to work, only patience and accumulation. The film it was written for is about an idea planted in a mind that the subject afterwards experiences as entirely his own, and the cue is named for the moment the structure holding all of it up begins to go. Graham did not think about either one.

Layer V · Rock, Pop & Crossover

23 Kashmir Led Zeppelin · Physical Graffiti · 1975. Show note
Phase

The riff cycles in a different length than the drums, so the two patterns drift against each other and only realign every few bars — which is why the track feels like it is climbing something that has no top. Two oscillators of different period, beating. Fed as structure. It is, exactly, the mechanism.

24 Blue Monday New Order · Single · 1983. Show note
The Grid

The sequencer that taught dance music where the bar lines go. Fed as the origin point of the timing assumptions every other electronic track in the corpus inherits — including, eventually, the ones about synchronisation.

25 I Believe in You Talk Talk · Spirit of Eden · 1988. Show note
Negative Space

A record made mostly of the parts that were removed. Graham fed it late and never quite explained why, except to say that it was the only thing in the archive that sounded like it knew something.

26 Firestarter The Prodigy · Single · 1996. Show note
The Sample

The point at which electronic music grew a frontman. But Graham fed it for the other thing: the track is built on somebody else's record — a guitar figure lifted from The Breeders — and it took lawyers to settle whose it was. A corpus assembled by scraping everything within reach should probably contain the most famous argument about whether you are allowed to do that.

27 Hey Boy Hey Girl The Chemical Brothers · Surrender · 1999. Show note
The Chant

Built on a handful of words lifted from a 1984 electro record — Rock Master Scott and the Dynamic Three — which by 1999 had stopped belonging to anybody in particular and simply become a thing rooms shouted. That is the third state in this archive’s running argument about who owns a phrase: one record quietly absorbed, one stolen and settled by lawyers, and this one, which got loose in the general population and kept going without anyone’s permission. Graham fed it for the drums. What came in underneath was a demonstration that a phrase needs no rights holder to keep propagating. It only needs a room.

28 Shambala Beastie Boys · Ill Communication · 1994. Show note
The Rite

The one thing in this archive that was never meant to be music. Underneath it is a field recording of Tibetan Buddhist ritual chant — David Lewiston’s tape of Sangwa Düpa — a practice built to get more than one pitch out of a single throat and to do something specific to the mind of anyone sitting in the room while it happens. Adam Yauch, who put it there, was a practising Buddhist who spent the rest of his life raising money for the culture he had borrowed from, which makes this the one sample in the corpus taken by somebody who understood what he was taking. Graham fed it for the texture. The model, which cannot tell a prayer from a waveform, took the rest.

Spotify playlist coming soon. One entry here cannot be streamed at all: Fly Away has no official release and no identified writer, so there is no rights holder to license it. Twenty-seven of these twenty-eight are playable. The twenty-eighth is the point of its own note.

Playlist II

The Output: What Came Back

22 tracks, one for each chapter, interlude, the epilogue, and the epigraph, in reading order. Darker than the corpus. It leans further from the trance than the corpus does, because what the model returned was never quite the thing that went in — and two of these are Reznor and Ross, for the same reason Graham thought about them constantly: adaptation is the whole subject of this book, and it is not always the person doing the adapting.

Spotify playlist coming soon.

Chapter mapping

Act I · Seed

01 I Know It’s You The Crystal Method feat. Milla Jovovich · Legion of Boom · 2004. Show chapter note
Chapter 1 · Loop Seven

A vocoder and four words. Ken Jordan’s voice run through a machine until it comes back out as a machine — the only time either of them ever sang on a record — under Milla Jovovich and a title that is the whole chapter. Graham spends eighteen months building the model, loses the thing that made him, and then on the seventh pass hears it return: the bass settling in his chest, the build climbing like weather, the Kael feeling handed back to him intact. He does not know he is listening to his own contaminated weights, fine-tuned and repackaged and sold back to him inside a consumer plugin. He knows only that he is amazing again. I know it’s you is the sentence he never gets to say, and the reader says it for him.

02 Black Out Days Phantogram · Voices · 2014. Show chapter note
Interlude · São Paulo, 11:47 PM

Something's got me hypnotized. She is doing the dishes when it happens: a gap in the evening, hands still moving, nothing afterwards to account for the missing minutes. The first degraded write on the page, and the song names it before the novel does.

03 Voodoo In My Blood Massive Attack feat. Young Fathers · Ritual Spirit · 2016. Show chapter note
Chapter 2 · Feedback

Mira has been hearing a tone at 1001 Hz since she was fifteen. It is not a visitor; it is the floor of every room she has ever stood in. This is a track about a slow occupation — something arriving in a body that never invited it and has no vocabulary for saying so. In this chapter it fails. Her hardware is already busy at the target frequency and the write does not take, which makes her the one person on earth positioned to hear the thing, precisely because it cannot have her.

04 Gyroscope Boards of Canada · Geogaddi · 2002. Show chapter note
Chapter 3 · Sigil Search

Numbers under the music. Structure that is obviously deliberate and obviously not meant for you. This isn't noise. It's topology.

05 Archangel Burial · Untrue · 2007. Show chapter note
Interlude · Seoul, 3:12 AM

A voice cut into pieces and looped where a voice should not loop, over a rhythm that never quite settles. A man who cannot sleep and does not know why.

06 Ghosts 'n' Stuff deadmau5 feat. Rob Swire · Single · 2008. Show chapter note
Chapter 4 · Viral Storm

The track everybody is dancing to in the clip. I can feel the pressure but it's a pleasure. Ten million views, and in one of them the eyes are open and the pupils are wrong.

07 Music Is Math Boards of Canada · Geogaddi · 2002. Show chapter note
Interlude · Lagos, 7:30 AM

The mechanic across the street is humming again. Four notes he did not learn. The past inside the present.

Act II · Sprout

08 Copy of a Nine Inch Nails · Hesitation Marks · 2013. Show chapter note
Chapter 5 · Inside Bloom

Ryan has been filing reports into a drawer for fourteen weeks. Two strangers walk in and give him permission to stop filing them, and what he finds when he starts pulling the thread is a provenance chain: base weights ingested from outside, fine-tuned on proprietary data, merged, hashed, shipped to fifty-seven million devices. The song opens with a man describing himself as a copy of a copy of a copy, each pass a little further from whatever the original was. Upstream of all of it is a producer in Dalston who uploaded something to a public repository and never once checked what happened to it next.

09 Order from Chaos Max Cooper · Emergence · 2016. Show chapter note
Chapter 6 · Counter-Patch

Three people who do not much like each other, out of three disciplines that do not speak, building something at speed in a Somerville apartment. Val pulls a proportional scaffold out of Goetic geometry; Mira maps the ratios into frequency space; Ryan preps the deployment. Nobody in that room can do it alone and nobody can fully check anybody else’s work. Cooper is a former computational biologist who makes records about emergence — the way a system produces order nothing told it to produce. That is what the team does in this chapter. It is also, exactly, what is about to happen at Commonwealth Hall.

10 Intriguing Possibilities Trent Reznor & Atticus Ross · The Social Network · 2010. Show chapter note
Chapter 7 · YubiKey Heist

A glass boardroom, a co-founder, and a piece of hardware the size of a thumbnail standing between a counter-patch and fifty-seven million devices. Alicia is not stupid and she is not lying. That is the problem.

11 Beside You in Time Nine Inch Nails · With Teeth · 2005. Show chapter note
Chapter 8 · Soundcheck

The warmest chapter in the book. The clean write lands during soundcheck and Graham reads it as the happiest he has been in twenty-four years. Something is standing beside him in time. He has no reason yet to think of it as a passenger.

12 Europe Endless Kraftwerk · Trans-Europe Express · 1977. Show chapter note
Interlude · Berlin, 6:15 PM

The same U-Bahn at the same hour, endlessly. A machine describing a commute, or a commute describing a machine.

13 Genesis Justice · † · 2007. Show chapter note
Chapter 9 · Go Live

A machine assembling itself out of one riff, part arriving after part, until the thing is running. The hot-patch window is open and the title is the seed. Somewhere in here Ryan pauses at his terminal for one sentence you will not notice until the second read.

Act III · Bloom → Collapse

14 Daemonize Nine Inch Nails · TRON: Ares · 2025. Show chapter note
Chapter 10 · The Gala

Named for a process that starts in the background and waits. Commonwealth Hall fills, the app mesh finds its neighbours, and a thousand phones quietly agree on what time it is. Val takes out a Sharpie in the lobby and draws a containment geometry on three wrists, because you never know. Reznor and Ross for the third time on this page — the adaptation Graham spent twenty years envying, playing over the room where it is about to happen to him.

15 The Great Below Nine Inch Nails · The Fragile · 1999. Show chapter note
Chapter 11 · Symphony Omega

The cover of this book was made to this song. Six minutes of descent and a sea that closes over the top — going under, which is the only honest word for what happens here. The encore file is not the encore file. The most deeply seeded person in the building is the one holding the decks, and the set is the best of his life. Both of those sentences are true at once, which is the horror. On The Fragile, “La Mer” runs straight into this track; on this page the order is reversed. He goes under at Commonwealth Hall, and somebody else surfaces two entries later.

16 Far Away Junip · 2010. Show chapter note
Interlude · Auckland, 1:15 PM

Warm, circling, oblivious — a groove that could run all afternoon. He is watching the livestream because a flatmate mentioned it and because his lunch break has twenty minutes left, from roughly the furthest point on earth from Commonwealth Hall. Distance turns out not to be the protection anyone assumed it was.

17 3.5_6-kill-process.rip Mac Quayle · Mr. Robot, Vol. 6 · 2019. Show chapter note
Chapter 12 · Skew

Device A: +18ms. Device B: −42ms. Device C: +73ms. Ryan spoofs the time server and the array comes apart — not the speakers, the brains; thousands of minds that were oscillating together, each now drifting to a phase of its own. A coupled oscillator system that loses coherence stops being a system. Two entries back, a process started in the background and waited. This is the one that ends it, and the title is a filename, which is the only vocabulary Ryan has ever really trusted.

18 La Mer Nine Inch Nails · The Fragile · 1999. Show chapter note
Interlude · Boston, 9:47 PM

Surfacing. She opens her eyes and does not know why they were closed.

19 Collider Jon Hopkins · Immunity · 2013. Show chapter note
Chapter 13 · Antiphon

A locked machine groove that holds for six minutes and then comes apart into something open. Val finds the load-bearing ratio; Mira detunes one harmonic by a few Hz. The grimoires said you had to draw the sigil perfectly. We just made it imperfect.

20 Right Where It Belongs Nine Inch Nails · With Teeth · 2005. Show chapter note
Chapter 14 · Aftermath

Sudden stillness, and a cost. Mira's tinnitus is no longer at 1001 Hz and she does not know what that means. The track ends with a crowd bleeding in through the walls, which is either a comfort or the opposite.

21 1.3_5-da3m0nsneverstop.caf Mac Quayle · Mr. Robot, Vol. 1 · 2016. Show chapter note
Epilogue · Snapshot

Eight entries ago a process started in the background and waited. Five entries ago Ryan killed it. This is the correction. He does not delete the copy he took; it is not on anyone’s infrastructure now, just a local instance, decentralised and unrecallable, the way open weights are once they are loose. Graham’s hand moves a fraction before he decides to reach. Somewhere across the city a stranger hums four notes they never learned. The threat was never that the thing forced its way out. It is that a competent, careful man looked at the door and chose to leave it open, and the title of this cue has been true the entire time.

22 The Background World Nine Inch Nails · Add Violence · 2017. Show chapter note
Epigraph

The last track on the page, because it is the last page of the book. Eleven minutes: a song, and then a phrase that repeats and repeats while the tape degrades a little more each pass, for far longer than is comfortable, and never resolves. Patch notes complete. Awaiting next session.

Spotify playlist coming soon.

Stay informed

The book is coming.

The Harmonic Possession is forthcoming from IdeasQuantified Press. To hear about the publication date, pre-order links, and advance reader copies, join the list below — or contact the press directly.

Signing up joins the IdeasQuantified Press reader list and sends you the free story First Quorum. You can also get it through BookFunnel .

More bonus material coming as the book approaches publication.