Play the music you love,
your way.

Upload a score or write one from a prompt. Play it back in your browser, simplify it, change the key, or edit it in plain English, then download it, all in one place.

Try it free →

Composition 1

A Minor · 4/4

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Real output from the engine. Try your own score at studio.lalascript.com →

FROM UPLOAD TO FINISHED SCORE

Three steps. No desktop software.

Bring a score, say what you want changed in one sentence, and take it anywhere.

Drag in a PDF.

Or MusicXML, or an MSCZ file. A clean export reads best; scans are less reliable.

The LalaScript upload box, with the file types it accepts

Say what you want changed

Name a bar, a staff or a beat. The engine does it, and tells you what it did.

Try:

Make it easier for a beginner to play, with simpler rhythms and fewer notesChange the G in bar 8 beat 2 to an ATranspose to D majorAdd a violin staff above the pianoMake it alto saxPut the bottom staff in bass clefAdd a left hand underneath the melodyMake the tempo 92Transpose it down a whole stepTake it up a minor thirdTranspose to F sharp minorTranspose only the violin up a whole stepChange the time signature to 3/4Put it in 6/8Change the key signature to two sharps without transposingPut the left hand into block chordsGive the left hand broken chordsMake the piano softer and the violin louderMake the whole thing forteDelete bar 4Delete the bottom staffAdd a flute staff above the pianoAdd a piano accompanimentArrange it for violin and pianoMake it celloFour bars per lineMake bars 9 to 16 simplerTake it down a fourthMove the melody up an octaveChange the title to Nocturne

Take it anywhere

See and hear it in your browser. Then share or download.

MusicXMLMSCZPDFMP3

WHO IT'S FOR

Made for musicians at every stage.

🎼

Accompanists & MDs

Re-key a chart for a singer in seconds, keep it editable, and hand over a clean part without an evening of re-engraving.

👩‍🏫

Teachers

Stop hand-editing arrangements. When you want to give a student the song they actually asked for, adapt it to where their hands are in seconds, not an evening.

🎹

Students

Found a piece you love that's still out of reach? Get a version you can learn from now, without losing the song.

🎤

Singers

Need a song in your range? Drop any chart to the right key in one click, then download the accompaniment.

✨ ALSO NEW · CREATE

Start from nothing.

Describe a piece and get real, playable notation, or hum a melody and watch it turn into a score you can edit. Generation is built on our music-theory engine, so every chord is spelled by rule, every bar adds up, and both hands stay playable. What comes back is real notation, not a lucky guess. Ask for theory and it comes back labeled: numerals, key, cadence.

PROMPT "an 8 bar blues jazz guitar solo"

HUM a tune into your mic, get it notated

UNDER THE HOOD

Built on music theory, not guesswork.

Most tools treat notation as pixels. LalaScript reads it as structured musical knowledge: melody, harmony, voice roles, and difficulty, then reasons about it the way a trained musician would.

Semantic analysis

Every note is tagged with its musical role, melody, inner voice, or bass, before any transformation happens.

Melody preservation

The melody is identified and protected. Simplification only removes what doesn't carry the music forward.

Constraint-based output

Hand span, chord density, and rhythmic complexity are treated as hard constraints, not suggestions.

Deterministic where it counts

Transpose, re-voice, and thin chords run on a fixed, rule-based engine, so they are exact and repeatable. AI steps in only for the genuinely creative edits.

Editable, not a picture

Output you can open and fix in MuseScore, Sibelius, or Finale. Not a flat scan of your score, the gap every other converter leaves open.

Deterministic and inspectable

Same input, same output, every time. The mechanical work runs on a fixed music-theory engine, not a black-box guess you have to double-check.

Adapts difficulty, not just key

Thin dense chords, strip ornaments, keep the melody. The piece lands at the level you actually play, and still sounds like itself.

Ready to try it?

Start free, no card needed. Bring your own score or explore the examples.

Open the studio →

ALSO FROM LALASCRIPT

Check out our apps.

Small, focused music apps we build alongside the studio.

🎵

Fretless

Slide to play. Lock to real musical notes, record a phrase, then solo over it live.

Play it in your browser →

🥁

RhythmSketch

Rhythm and ear training led by haptics. Feel the pattern, tap it back, see your accuracy.

Google Play →

🎼

BeatsEye

Hear a rhythm, then pick its notation out of four. Your streak sets the difficulty.