Compangon — It reads your living score — and composes with you.

An AI composition assistant powered by a language model — tuned to understand music, not just words. It doesn't write over you; it works inside the score you're already writing.

Reads

Compangon reads the live score straight from your notation editor — every note, key, and voice.

Understands

A language model reads it the way a musician does — reasoning about harmony, melody, rhythm, and form, not just generating sound.

Continues

It maps out a whole piece — form, sections, and keys — then composes it into editable notation, yours to keep, change, or build on.

See it in motion

Continue a piece

Ask for more, and Compangon writes the next eight bars for the whole quartet.

Harmonize a melody

Give it a tune, and Compangon writes the harmony underneath. The melody stays as it is.

Add a second voice

Compangon writes a second line in counterpoint to your melody.

Transpose

Move the whole quartet to a new key in one step.

Musical analysis

Harmony, rhythm, and form — understood, not guessed.

In your voice

Compositions that fit the key, harmony, and shape of your score.

Inside your notation

Works with the score you're already writing.

Private by design

Runs on your machine. Your music stays yours.

You are the composer.

Compangon is a copilot, not autopilot. It suggests; you decide. Every note is yours to keep, change, or ignore.

Free during the beta

The language model runs at your own provider, on your key — you pay them directly, and what you send it never passes through our servers.

Compose with Compangon.

For now, Compangon works only with MuseScore Studio — the free notation editor.