Built by one developer in Sweden, on the side of running a small software consultancy. It started with one specific frustration. The rest of this page is what came of it.
A developer who started writing songs and ran out of tools that fit.
Built by one developer in Sweden, on the side of running a small software consultancy. It started with one specific frustration. The rest of this page is what came of it.
It started with lyrics. Words on a page, melodies in my head, and a wish to actually hear them.
The obvious first step was AI music generators. Feed in lyrics, get something back. The results were fine. Technically competent. But everything sounded the same. Polished, predictable, mainstream. The AI had its idea of the song. I had mine. They didn't meet.
Then I found Hookpad. A piano roll with music theory built in. The chord palette knows the key. The melody editor highlights the scale notes. First time a tool actually taught me something while I used it.
But Hookpad has a ceiling. Melodies and chord progressions, yes. Drums, full arrangement, anything resembling an actual band, no. The moment I wanted more than a sketch, I was stuck.
So I tried FL Studio. Every knob does something. Almost none of it labelled for someone new to writing songs. Setting up one instrument took longer than the chorus had.
What I actually wanted was somewhere in between. The harmonic intelligence of Hookpad with enough depth to finish a song. Drums, multiple instruments, real structure. Not a production suite, not a toy. A composer's tool that doesn't assume you already think like a DAW.
Two options at that point: keep fighting tools that didn't fit, or write my own. As a developer, only one of those was ever going to happen.
Kiwisonic is in early preview. Some parts work well. Others are sketches. A few features I'm not even sure should exist yet, and I'm using the preview to find out.
That's why it's free right now. Charging for something I'm still actively shaping doesn't sit right.
There will be a price later. I haven't decided what that looks like. Until then, the most useful thing you can do is download it, use it, and tell me what's missing, broken, or wrong. If you write to me, I read it.
| You are… | Your situation | How Kiwisonic helps |
|---|---|---|
| A guitarist | You want to write a full song but don't know which chords go together in a key | Chord suggestions and the Circle of Fifths show you the harmonic options for your key visually |
| A beginner producer | DAWs feel overwhelming, with hundreds of controls before you've placed a note | AI generation creates a rough first draft in seconds. Genre profiles and melody generators take it from there |
| A melody seeker | You know what you want a melody to sound like, but you can't quite find the notes | Scale highlighting and melody generators help you find notes that match your instinct |
| A theory student | You want to hear theory concepts immediately, not just read about them | Kiwisonic makes scales, chord progressions, and voice leading immediately audible |
| An intermediate musician | You need a fast, focused sketchpad before moving ideas into your full DAW | Compose a full section-based song structure and export as MIDI for your DAW to take over |
Kiwisonic is a composition tool, not a production suite. Here is what's outside its current scope.
| Limitation | Notes |
|---|---|
| No audio recording | Kiwisonic is MIDI and instrument-based only. You can't record your voice or a live guitar into it |
| No dedicated mastering tools | The master bus chain covers glue compression, saturation, and tone shaping for final polish. There is no loudness metering or multiband processing, so detailed mastering still belongs in a DAW |
| No sheet music / notation | Notes are in the piano roll only, not staff notation |
| Windows only | The audio engine currently uses Windows-specific APIs; Mac and Linux are planned |
| Limited MIDI automation | No parameter automation curves (e.g., filter cutoff over time) |
| No mid-song time signature changes | A song has one global time signature |
| No collaboration | Single-user. No cloud sync or real-time collaboration |
These are deliberate scope choices for now. The list can change once the core is settled.
Free during early preview. Windows 10 / 11. No payment, no account required.
Download Kiwisonic