The AI-Powered MIDI Editor
Compose • Edit • Transform • Play - with an intelligent copilot that understands music.
✨ Features
Everything you need for MIDI editing - plus an AI that actually helps.
MidiPilot AI Copilot
20 AI tools, live Agent streaming, provider model refresh, favourites, and natural language MIDI editing. Compose, harmonize, fix, and refine - just ask.
MCP Server
Drive the editor from Claude Desktop, VS Code or Cursor: the built-in MCP server exposes the same tools MidiPilot uses - list and switch documents, query and edit events, FFXIV tools included - over the Model Context Protocol.
Tabs & Editor Groups
Keep several MIDI files open as tabs and edit two side by side in independent editor groups. Drag tabs between groups, compare with synced scroll, zoom and cursor, and each document keeps its own selection and view.
Real-time Collaboration
Co-edit MIDI files live with up to 8 peers over LAN or WAN, peer-to-peer over WebRTC + DTLS. Async PR workflow with smart-paste tokens, optional Discord webhook for sharing, and a 6-second Connection Test diagnostic.
Score & Tab Import
Open Guitar Pro (GP1-GP8), MusicXML (.musicxml / .xml / .mxl), and MuseScore (.mscz / .mscx) files directly - auto-converted to MIDI on open.
FFXIV Bard Mode
One-click FFXIV channel fixer for MidiBard2 - deterministic algorithm, no AI needed. Guitar variant switching, range clamping, validation.
FFXIV Voice Limiter
A live analyser for FFXIV bard performances: a toolbar gauge and a voice-load lane show where your arrangement would exceed the game's 16-voice ceiling and be silently degraded - so you can spot and fix hot-spots before you upload.
Auto-Fit Voice Load
The action to the analysis: thins overloaded moments and over-dense passages - whole song, one range, or exactly the notes you selected. Per-track intensity, live preview, dry-run first, one undo step. Works on any MIDI file.
FFXIV Drum Split & Kit Editor
One click turns a GM drum track into named FFXIV percussion tracks, with pitch-mapping kits for instantly playable drums. Build your own kits by duplicating any kit and editing its mappings - with an audio A/B that plays the GM drum and its FFXIV target back to back.
FluidSynth & SoundFonts
Built-in FluidSynth synthesizer with multi-SoundFont stacking and per-font gain - high-quality General MIDI playback right inside the editor.
Audio Export
Render your MIDI to WAV, FLAC, OGG, or MP3 (bundled LAME encoder) through the current SoundFont stack - full song or a custom range, with reverb-tail capture and per-channel solo.
7 Themes & MIDI Visualizer
MidiEditor AI brand, Dark, Light, Classic, Sakura, AMOLED, Material Dark, plus Follow-OS auto-switch. 10 color presets for note bars. Real-time MIDI visualizer for playback.
Lyric Editor & Visualizer
Full lyric timeline with drag, resize, split & merge. Tap-to-sync dialog, SRT/LRC/text import, and a karaoke toolbar widget with real-time color sweep.
Professional Piano Roll
Full-featured piano-roll editor with velocity/CC editing, quantization, copy/paste, recording, multi-track support, and smooth playback scrolling.
Editing Tools & Channel Splitter
Split multi-channel MIDI files into one track per channel with GM names, explode chords, delete overlapping notes, convert pitch bends to discrete notes, plus markers for Program Changes / CC / text events and C3-C6 octave guides.
Commodore 64 / SID
Open .sid tunes as editable MIDI, then hear them authentically:
play the converted MIDI through a C64 SoundFont, or the original SID through the
cycle-accurate libsidplayfp engine. A retro SF2/EMU toolbar switch flips between them.
Convert Tempo, Preserve Duration
Re-target a MIDI from one BPM to another while keeping the real-time playback length identical - one atomic, undoable action with Replace / Scale / Events-only modes.
MCP Server
Built-in Model Context Protocol server - connect Claude Desktop, VS Code Copilot, Cursor, or any MCP client and edit the open MIDI file directly through AI tools.
📷 Showcase
See MidiEditor AI in action.
🎨 Theme Preview
7 built-in themes - click to preview.
🆕 What’s New
v2.1.2 - August 2026
Hotfix
- FFXIV mode did not work on OpenAI models - with the FFXIV checkbox on, every request failed instantly and no tool ran, because one FFXIV tool declared its parameters in a way OpenAI rejects - and a single rejected tool takes the whole request down with it. This hit every gpt-5 model including the shipped default; other providers were unaffected.
- A failed step no longer just says “failed” - when MidiPilot refused a tool call, the reason went back to the AI but was never shown to you. It now appears in the chat, so a stalled run is readable.
- MidiPilot blamed the server when a local model wrote too much at once - if a local server (Ollama, llama.cpp) refused an oversized tool call, MidiPilot reported “busy or temporarily unavailable” and re-sent the identical request, which could never succeed. It now names the real cause and asks the model for smaller steps, so the next attempt can finish.
- Local models were cut off after three minutes - a local server (Ollama, llama.cpp) sends nothing at all until an answer is finished, so an ordinary turn on a model running on your own GPU ran out of time and ended in “Request timed out”, however healthy the setup was. Local models now get the same generous limit as reasoning models.
⚖️ MidiEditor AI vs. Original
| Feature | Original MidiEditor | AI Edition |
|---|---|---|
| AI Copilot (MidiPilot) | ✖ | ✔ |
| Guitar Pro Import (GP1-GP8) | ✖ | ✔ |
| FFXIV Bard Mode | ✖ | ✔ |
| FluidSynth Playback | ✖ | ✔ |
| Audio Export (WAV/FLAC/MP3) | ✖ | ✔ |
| Themes | 1 | 7 |
| Note Color Presets | ✖ | 10 |
| MIDI Visualizer | ✖ | ✔ |
| SoundFont Management | ✖ | ✔ |
| Chord Detection | ✖ | ✔ |
| Split Channels to Tracks | ✖ | ✔ |
| Explode Chords to Tracks | ✖ | ✔ |
| FFXIV Drum Split (GM kit → bard percussion tracks) | ✖ | ✔ |
| Delete Overlaps Tool | ✖ | ✔ |
| Glue Notes Tool | ✖ | ✔ |
| Strum Tool | ✖ | ✔ |
| Convert Pitch Bend to Notes | ✖ | ✔ |
| Context Menu (Move Track/Channel/Transpose) | ✖ | ✔ |
| Octave Transpose | ✖ | ✔ |
| Lyric Editor & Visualizer | ✖ | ✔ |
| MCP Server (AI Tool Protocol) | ✖ | ✔ |
| Real-time Collaboration (LAN / WAN / PR / Discord) | ✖ | ✔ |
| Commodore 64 / SID Import & Playback | ✖ | ✔ |
| MusicXML Export | ✖ | ✔ |
| Cursor Time Display | ✖ | ✔ |
⬇ Download
Free & open source. Windows 10/11.
Portable ZIP - extract & run. No installer needed. · Download details · All releases