Cologne, since 2026

One label.
Several
names.
One person.

I write and produce everything that comes out on this label, under a handful of different names. One name per kind of music, because the records don't really belong next to each other. That's the whole setup.

Have a listen
  • 5 projects
  • 5 albums
  • Cologne

01 / What this is

A small label, run by one person

01

Why several names

Each name stands for a different kind of music. I keep them apart because that's how the records make sense: if you came for one, the other would only get in the way. Musicians have done this forever. It sorts the work, it doesn't hide who did it.

02

AI is part of how I work

I use AI tools while making these records. Which ones, what for, and what I do myself is written down on the transparency page. Nobody's voice gets cloned, and nothing goes out the way a tool spat it out.

03

Just ask

My name, address and email are in the Impressum. If something here is unclear, or you want to know how a particular track came about, write to me and I'll tell you.

02 / Projects

The names

Five projects, all mine. Each one is a different corner of music.

  • MÅRUP

    Melodic techno

    Melodic techno on the calmer side. Long build-ups, nothing hectic.

  • ANISORA

    Anime-inspired

    Inspired by anime soundtracks. Energetic, loud, plenty of drive.

  • PROMPT INJECTION

    Metalcore, electronic

    Metalcore with electronic elements. The heaviest thing on the label.

  • Theo Grey

    Radio pop

    Feel-good radio pop. Songs about love, made to sing along to.

  • AISAAC

    No fixed genre

    Whatever fits none of the other names. Film score one week, hardstyle EDM the next.

03 / Catalogue

Releases

EU marking: made with AI tools
Cover of Samsø by MÅRUP: a blue horizon over a golden shore with concentric rings.

10 September 2026

Samsø

MÅRUP

Cover of アニソラ by ANISORA: a violet dot grid with a single falling light.

10 September 2026

アニソラ

ANISORA

Cover of STATUS_0 by PROMPT INJECTION: black with a red slash and terminal type.

10 September 2026

STATUS_0

PROMPT INJECTION

Cover of the LP

10 September 2026

Summer

Theo Grey

Cover of the LP

10 September 2026

Mix

AISAAC

04 / Process

How a record comes together

  1. 01

    Idea

    Which name it belongs to, roughly how it should sound, what it's about. That comes before anything else exists.

  2. 02

    Making it

    Writing, prompting, listening, throwing most of it away, arranging what's left, mixing, mastering. This is where the time goes.

  3. 03

    Putting it out

    Cover, catalogue number, off to the streaming platforms, plus the AI disclosure that goes with every release.

05 / Notes

About the label

Who's behind this?

That would be me, Isaac Kallhammer. I run the label and make everything on it myself. Name and address are in the Impressum, a bit more about me on the about page.

Are MÅRUP, ANISORA, PROMPT INJECTION, Theo Grey and AISAAC different people?

No, they're all me. Different names for different kinds of music, nothing more than that.

Do you use AI?

Yes, as part of the process. The transparency page says what I use it for and what I do myself.

Do you clone anyone's voice?

No.

How often does something come out?

When it's finished. A few records a year, usually.