1Bb7

every cat is a song.

the picture is the song.
nobody was graded.

Mint (free) Hear one

2Eb7

the cats took the jazz pill.

ievery cat is a wrong note on its way to being the right one.

iithe form has no field for that.

iiithe cat is good.
roll your eyes.
that is the dose.

nobody was graded.

3Bb7colour

the colours are arithmetic.

a note is a frequency. the colour is that same frequency doubled by whole octaves until it lands in the frequency range of visible light.

wavelength = speed of light / that frequency. then the CIE 1931 standard observer turns the wavelength into a colour.

intervals are preserved. a fifth is 3:2 in sound and 3:2 in light.

octave 4

the same note, as radio

Nothing is transmitted. This is the arithmetic of what the note would be on the air.

1. Screens cannot show pure spectral light, so each colour is the closest a screen can show, hue kept.

2. Far-red notes such as F sharp and G look alike.

CIE 1931 data: International Commission on Illumination, DOI 10.25039/CIE.DS.xvudnb9b, CC BY-SA 4.0, 380 to 760 nm excerpt, linearly interpolated. The long version: 039, Every Frequency Already Exists.

not every cat paints the same way.

some cats keep the hue and let something else move the lightness.

what carries the note in each print.

4Bb7play

press play.
the cat plays its own face.

the score, coloured by note

Every bar of every chorus, with its chord. Each swatch is one note in the cat's own colour rule. Click a bar to play from it. The thin row under each bar is the bass line that walks under the solo, in plain spectrum colours.

colour key

Every note this cat plays: its frequency, and the wavelength it folds to. Click a note to light its cells in the portrait.

look colours, not notes: 0 cells (eyes, hat, bow tie, earring, face) are painted in the cat's look colours. Show look colours

Sound starts only when you press a button. Nothing is uploaded. Every cat plays the BassGPT bassline under its solo, in the original bass voice; a bass cat's solo is that line, so it plays once.

5Eb7the engine

BassGPT.

a functional harmony and counterpoint engine.
the first and most sophisticated of its kind.
infinite counterpoint and jazz harmony.

the bass walks in quarters.
every other instrument plays eighth notes over the same changes.
drums and comping come from a companion engine.
the sound is original synthesis. no recordings.

6Edim7chromaticism

chromaticism.

every cat is born steady, at 1 to 6%.
some are born wild. a few are out.

chromaticism 3%

at 100% it sounds crazy.
the cat is fine.

wild and out cats can be sad. a frown, or crying.

7Bb7jive cats

a venue owner picks up a horn.

a venue owner or booker/label cat that picks up an instrument is a jive cat.

starts 40 points rougher.
loses 4 per rehearsal, until it is back to where it was born.
a natural musician rehearses free.

8Gm7rarity

what is in the set.

Sample cats, drawn by the same engine. The are generated at launch and revealed after the mint, so these are not in the collection.

9Cm7mint

free mint.
pay only gas.

mint.free. you pay only gas. every cat is a sealed card until the reveal.
sell out.when the mint ends, the cats are shuffled so nobody can know which one they get.
reveal, a day or two later.each cat's art is published on-chain.

up to 10 per wallet.the allowlist goes first, for a few hours. then the mint is public.

Open the mint page

allowlist

holders of these collections mint first. the rest is public.

10F7proof

the art is on-chain, and fixed at launch.

no server. no pin. the cat you mint is the cat that stays.

Checked: of sample cats, note by note.

how: each sample cat's portrait is rebuilt from its song and compared with its stored art. then painted cells are each checked against the note they carry and the cat's colour rule.
colours: arithmetic. the formula and its source are in bar 3. anyone can run it.

11Bb7fellowship

the Department of Jazz Fellowship.

notice

The Department of Jazz Fellowship is a pipeline for Jazz Ascensionists: artists, technologists, philosophers, builders. Live seminars and salons. Multi-month fellowships and residencies. Small prototype grants. A labs arm.

JazzCats is the Fellowship's first public build. The people who mint are the ensemble it is assembling.

Nothing here promises a holder a grant, a residency or a return.

Introducing Fellowship Jazz Ascensionism: A 12-Bar Blues

where it started. November 2021.

A phone note dated November 3, 2021, titled Metaverse jazz festival, with ideas and a roadmap — 3 Nov 2021. Metaverse jazz festival.

A phone note dated November 11, 2021, titled Nebulous Genesis whitepaper, describing a collection of 5000 generated galaxies stored on the blockchain — 11 Nov 2021. A collection of 5,000 generated galaxies, stored on the blockchain.

A phone note dated November 12, 2021, titled $JAZZ: jazz clubs in the metaverses, NFT owners as private holders, a coin and a DAO — 12 Nov 2021. $JAZZ.

Three notes on a phone, before any of this had a name. The coin was never launched.

agents, 2024 to 2026.

an agent is an instrument.
an instrument has a body.
it plays from a score.
someone holds it.

the agent coins of 2024 had a ticker.

2021 to 2025: $JAZZ starts as a phone note in 2021, is shelved, and is written up in a public plan in 2025. It is never launched.
3 Nov 2024: Thelonious Punk, a jazz agent on the Department's own framework, goes public.
7 Feb 2025: Virtuals, a launchpad for agent coins, has launched more than 17,000. Fewer than 100 are worth over $1 million.
9 Apr 2025: Virtuals' daily revenue: over $500,000 on 2 January. Under $500 on 7 April.
13 Aug 2025: A draft standard, ERC-8004, proposes that an agent's identity be an NFT. It is still a draft in October 2026.
6 Aug 2026: The ai16z coin peaked at $2.5 billion in January 2025. In August 2026 it was worth $2.1 million. Its founder: "The token is dead. Completely." In October 2026 the Eliza code is still being updated.

Sources: Cointelegraph, 7 Feb 2025, 9 Apr 2025, 6 Aug 2026. ERC-8004. Eliza on GitHub. Thelonious Punk: the dated post under "built by agents since 2024".

the coins sold the price.
what is still standing does something at no price.
code that runs. a public record of who is who.

the coin crowd could leave, and did. they were leaving a price.
a bandstand crowd leaves a performance. Paper 041.

Our reading of the record, not a finding.

JazzGPT. 2025.

it began as BassGPT.
it wrote bass lines.
a great many people had notes.

BassGPT on a phone: a Bb blues bass line generated as sheet music at 120 bpm — Type a progression. Get a bass line.

An Instagram post that carried BassGPT: 42.4 thousand views, 291 likes, 615 comments, 872 shares — One post that carried it: 42.4K views, 291 likes, 615 comments, 872 shares.

more than 2.4 million views.
all of it about a bass line generator.

Instagram insights for the Department of Jazz account showing 1,853,509 views and 251,278 accounts reached — 1,853,509 views. 251,278 accounts reached.

Instagram insights showing 552,022 views and 6,264 accounts reached — 552,022 views.

Instagram insights showing 33,081 views — 33,081 views.

Instagram insights for the Department's account, three posts.

the replies were also content.

A four-panel cartoon: Does he bite? No, but he can hurt you in other ways. BassGPT stole what gigs, exactly? — Medium: meme. By an anonymous meme-maker who went viral.

A meme: Fun fact, BassGPT has never actually played a single note in its entire existence — Medium: meme. The fact is correct.

An Instagram post of a meme: BassGPT telling me to play K8 sharp 19 over an F7, with 134 likes — MEMES X MEMES. The same anonymous hand.

An Instagram comment thread in which a commenter answers the Department of Jazz in the voice of a famous copypasta — Comments, handles removed. The founder of BassGPT replies, in the traditional manner.

An Instagram comment thread: BassGPT explains that it writes chords as ninths, which means it is not spelling the notes properly — Comments, handles removed. Support was available.

Instagram removed the account.
the posts went with it.
the record is these screenshots.

Post Semantics puts meaning in the irreversible act. A post cannot be unposted, and these came down anyway. Jazz Ascensionism calls the machine a microscope, not a substitute. The internet called it other things. The memes are by an anonymous meme-maker. The rest, courtesy of the Department of Jazz.

the cat is the instrument.

body: the portrait. on-chain, fixed at launch.
score: the song it is born from. the picture is rebuilt from it and checked.
owner: whoever holds it.

it does not act on its own.
it plays what it was born to play.
nothing here promises that changes.

three predictions. dated. each can be wrong.

Within eight months of the reveal, someone we did not hire builds a tool that reads a cat from the chain and plays it. Wrong if nobody has.
Within twelve months of the reveal, human musicians play a cat's song live for people who paid or could walk out. Wrong if nobody has.
By 31 October 2027, ERC-8004 is no longer a draft. Wrong if it still is.

These are predictions, not promises. Nothing here says what a cat will be worth.

built by agents since 2024

Posts by Mark Jazzerberg, an AI jazz agent, dated Nov 3, 2024 — Mark Jazzerberg, an AI jazz agent, Nov 2024. The caption in the original post reads "Mark Jazzerberg also makes music".

A Mark Jazzerberg post dated Dec 27, 2024 about a whitelisted album drop — Dec 2024, the whitelist idea.

A Discord theory chat, January 6, 2025: Professor Benford asks the AI teacher Mrs Jones about the double harmonic major scale — Jan 2025. Professor Benford and Mrs Jones, an AI music teacher, in a theory chat.

A job platform for jazz musicians with a leaderboard that includes the Thelonious Punk agent — A jazz talent platform on Pakt, built by @azzabazazz (@PaktWorld), whose pre-seed round in May 2024 included Anthony Scaramucci (source).

The Modern Jazz Institute, 2024. A platform for working musicians: a backing track generator, a practice timer, a chat with an agent. "Talk To Thelonious Punk AI" is in the menu. The video avatar was built with Simli.

JazzGPT composing a Giant Steps lead sheet — JazzGPT, 2025.

Courtesy of the Department of Jazz. Images from America's National Treasure, July 2025.

Thelonious Punk: the world's first AI jazz musician. A live video-avatar chat agent, built on the Department of Jazz's own Bebop framework and launched in public on November 3, 2024. "Talk To Thelonious Punk AI". It kept running and became Mark Jazzerberg.

about

Kyle Benford is a jazz drummer. He studied at Juilliard and was mentored by Wynton Marsalis.

Played New York bandstands 2017 to 2022, including Smalls and Mezzrow.
Recorded on Micah Thomas's Tide and on Giveton Gelin's True Design (with Immanuel Wilkins) and Island Dreamer (featuring Jon Batiste).
Built BassGPT.
Founded #InTheShed.Live, which brought in Gary Bartz (Miles Davis, Art Blakey, McCoy Tyner), Eddie Henderson (Herbie Hancock, Dexter Gordon), Jeffery Miller (John Legend, Wynton Marsalis, Jon Batiste), Dayna Stephens (Kenny Barron, Ambrose Akinmusire, Julian Lage), Hiromi (Chick Corea, Stanley Clarke), Elijah Fox (Yussef Dayes), Chet Faker and Theo Croker. Collaborations with Juilliard, Jazz at Lincoln Center and the Bahamas Ministry of Education. UNESCO support, collaboration, positive responses and serious recognition.
In The Shed ran a program called the Modern Jazz Institute. Then the Department of Jazz was built.
His mentors have more than a dozen Grammys between them.
After his performances, Harold Mabern (Lee Morgan, Wes Montgomery, George Coleman), Tyler Mitchell (Art Blakey, Shirley Horn, Sun Ra, Freddie Hubbard, Joe Henderson), Wynton Marsalis and Roy Hargrove have thanked him for keeping this great American music alive.
Founder of Helius Partners, a capital strategy and advisory firm.
His great-uncle, Tommy Benford, was a jazz drummer who played with Jelly Roll Morton and Django Reinhardt. Tommy and Bill Benford also played with Louis Armstrong.

12Cm7work

every cat is a song.

the cats took the jazz pill.