The free MIDI generator that rolls the dice—
and you load the dice.
MIDI Maker is an aleatoric music engine. It composes with weighted chance — thousands of tuned dice rolls deciding melody, harmony, bassline and drums — so every take is a genuine one-off. Tip the odds, re-roll what you don't love, then export MIDI, WAV or MP3, or stream MIDI live into your DAW.
What you get
From blank project to full arrangement in seconds
Complete Arrangements
Chance composes melodies, basslines, harmony and drums together—whole tracks, not isolated loops.
Fully Editable
Every note, rhythm, synth and probability can be changed before you export. You set the odds.
Browser-Based
No download, no install. Runs instantly in any modern browser.
Commit to Notes
Chance dealt you a great hand? Freeze any clip into real notes and fine-tune them in the piano roll — it plays back exactly what you see.
Export Anywhere
Export MIDI, WAV or MP3 for Ableton, FL Studio, Logic, Reaper or any DAW.
Live MIDI Out
Stream MIDI into your DAW or hardware as the track plays — every instrument on its own channel.
Workflow
Three steps. Full track.
Roll
Choose a genre and roll the dice. Weighted chance composes a complete arrangement in seconds.
Load the Dice
Tip the odds: adjust synths, rhythms, harmony, progression and effects, and re-roll any part until chance lands your way.
Export
Export MIDI, WAV or MP3 and drop it straight into your production workflow.
Hear it
Every one of these tracks was rolled, not written
Why MIDI Maker
Not another black-box music generator
- Start with an empty project
- Write every note manually
- Design every sound from scratch
- Slow idea generation
- High skill floor
- Composes with transparent, tunable chance
- Every note editable
- Every synth editable
- Export MIDI to any DAW
- No training data — nothing to imitate
- 100% royalty-free output
- Averages of its training data
- Generates finished audio only
- Cannot edit individual notes
- Black-box process
- Licensing uncertainty
Under the hood
Built for musicians—not just prompts
Browser Synthesis
Full synthesizer engine runs in your browser via Web Audio API. No servers, no latency.
Real-Time Playback
Hear your arrangement instantly — and because parts are re-rolled as it plays, no two play-throughs are quite the same.
Aleatoric Engine
Chance operations in the tradition of Mozart’s dice games and Cage—weighted rolls pick every phrase, so nothing is remixed training data.
Musical Structure
Generates intros, builds, variations and sections—not just a repeating loop.
Advanced Synth Engine
Oscillators, AM/FM modulation, ring mod, distortion, peak filters and ADSR envelopes.
Royalty-Free
No samples, no training data — nothing to clear and no royalties, ever. Personal use on Free and Pro; the Studio plan adds a full commercial licence.
Who it's for
Made for every kind of creator
Producers
Beat creative block. Generate new musical ideas and take them straight into your DAW.
Game Developers
Create adaptive, royalty-free music for any game genre without a composer on retainer.
Content Creators
Generate custom music for videos, streams and podcasts in the exact style you need.
Music Students
Explore harmony, rhythm and arrangement by studying and modifying generated tracks.
How it's used
Built for musicians and creators
Generate a track, export the MIDI, and pull it straight into Ableton or Logic. A full working idea in minutes — perfect for breaking through writer’s block.
Generate royalty-free, unique tracks that match the mood of each level, then tweak the exported MIDI to fit exactly.
Export a full arrangement skeleton as MIDI and orchestrate over the top in your DAW. A fast way to sketch cues and explore harmonic ideas.
Pricing
Start free. Upgrade when you're ready.
- Browser playback
- 5 generations per day
- 1 export per day
- Advanced genres
- Commercial use
- Unlimited generations
- 100 exports per month
- Live MIDI out to your DAW
- Advanced editing
- All 30+ genres
- Commercial use
- Everything in Pro
- Commercial use
- Priority generation
- Unlimited exports
- Early access to new features
FAQ
Common questions
Is MIDI Maker free?
Yes — the free plan includes 5 track generations and 1 export per day across five genres (house, techno, pop, disco and grime), with the full studio in your browser. Pro and Studio unlock every genre and remove the limits.
Do I need an account?
Not to make music — the studio opens and generates without one. You need a free account to download your tracks, and the daily allowances reset at midnight local time.
What DAWs does it work with?
All of them. Exports are standard .mid files (plus WAV and MP3 audio) with every instrument on its own track and drums on General MIDI numbering — there are import guides for Ableton Live, FL Studio, Logic Pro, GarageBand, REAPER and Cubase.
Is the output royalty-free?
Yes — everything you generate is royalty-free with no attribution required. Free and Pro output is licensed for personal projects; the Studio plan adds a commercial licence for releases, games, videos and client work.
Is MIDI Maker AI?
No. It composes with weighted chance — aleatoric music, not machine learning. There is no model and no training data, which also means no copyright ambiguity about where your notes came from.
Leave your next track to chance. On purpose.
Roll a complete, editable arrangement in seconds — then shape the odds until it sounds like you.
Start Creating Free