STORMUSI Composer
Two equal ways to compose. Describe the piece and the AI writes a complete, professional-grade score with every part — or open the notation studio and write, engrave and edit it yourself, with AI editing there whenever you want it.
Notation studio free forever · AI scores: 10 free credits to start, then charged by length
Set the ensemble, instruments and musical parameters yourself — or switch to Auto-compose and just describe the piece.
Your first AI score is free — this piece would otherwise cost 2 credits.
Lead sheet mode
Melody + chord symbols only — no other parts. Great for jazz, pop and song sketches.
Ensemble & instruments
4 parts selected
Form & style
Advanced notation
Write transposing instruments at written pitch (off = concert pitch)
Add tempo changes at specific bars. The score shows tempo markings and playback follows them.
Lyrics
AI lyrics cost 1 credit.
Your score will appear here
Set your ensemble, instruments and style on the left, then press Compose to generate a full notated piece.
Import score
Load an existing score from a MusicXML file or paste ABC notation to edit it here.
Notation is free. Pay only for AI scores.
Write and engrave your own music at no cost, forever. New accounts start with 10 free AI credits — after that, credits are charged by length, so a short sketch costs far less than a full ensemble movement.
Notation studio
The full notation studio, free. Nothing to buy, no account needed to start writing.
$0 always
- The full notation studio — staves, beaming, slurs, dynamics and lyrics
- Unlimited scores and unlimited bars
- Real playback while you write
- Print and PDF export
- MusicXML, ABC and MIDI import & export
- Every instrument, part and transposition
- Unlimited manual editing of anything you write
AI composition
Charged by length: a short sketch costs about 2 credits, a full ensemble movement more. Buy a bigger pack and each credit costs less.
10 free credits to start
New accounts start with 10 free credits — sign in so they're kept.
Credits never expire. They start at 40c each and drop to 32c in the largest pack. Every AI action is metered by how much it writes: a short score about 2 credits, a full-length ensemble score more, an AI edit about half its score, guitar tab from 1 credit, lyrics 1 credit. Every price includes payment processing.
- A complete notated score in every part, from one brief
- Every ensemble, form, style, mode and advanced control
- Chord symbols, lyrics and target bar count
- Open any AI score in the notation studio and edit it