Sigil
A downloadable tool for Windows
AI music tools for MIDI artists and indie retro-style game development, built to accelerate creative workflows and produce usable music in seconds.
Generate, arrange, refine, and export game-ready music from one focused sequencer.
Sigil combines local AI MIDI generation with a pattern-based music editor, helping you create loops, themes, and full arrangements without constantly switching tools.
Build songs from reusable patterns, edit notes in a full piano roll, shape tracks with instruments and effects, then use AI when you want fresh musical ideas.
Create overworld themes, battle music, menu loops, dungeon ambience, character motifs, and other game-inspired tracks faster.
What Sigil Helps You Do
Generate New Music
Create full MIDI ideas from scratch using two built-in local models trained on general MIDI and game MIDI material.
Continue Existing Songs
Extend your current arrangement with new bars that follow the structure and feel of your project.
Add New Tracks
Generate supporting parts for existing music, such as bass, harmony, leads, pads, drums, or counter-melodies.
Fill Missing Sections
Use infill tools to create music for specific parts of a song while keeping the surrounding context intact.
Edit And Refine Manually
Fine-tune every result with a piano roll, velocity editor, pattern tools, arrangement overview, and generation history.
Key Features
Pattern-Based Sequencer
Arrange songs using reusable patterns across tracks and bars, ideal for loops and structured game music.
Piano Roll Editing
Edit notes, timing, velocity, pitch, and patterns with a full MIDI piano roll.
Instruments And FX
Build multi-track arrangements with soundfonts, per-track effects, automation, modulation, volume, and pan controls.
SoundFont Playback
Scan, select, and manage SoundFonts so your MIDI arrangements have the right retro game character.
Theme Control
Switch themes and tune the interface for long writing sessions, including the default Black Magik look.
Playback And Export
Preview loops, audition changes, and export finished music to MIDI or audio formats.
System Requirements
Windows 10 / 11 (64-bit) — Tested and supported.
- 64-bit Intel or AMD processor
- 8 GB RAM minimum
- 16 GB RAM for larger projects and smoother local AI generation
- 3 GB free disk space
- Windows-compatible audio output device
macOS — Coming soon.
Linux — Coming soon.
Purchase
In order to download this tool you must purchase it at or above the minimum price of $15 USD. You will get access to the following files:
