Midi2mod
While MIDI files contain only note and control data (relying on your computer's sound card for the actual sounds), MOD files are "modules" that include both the music patterns and the actual audio samples (instruments).
The Conversion Challenge: Because MIDI lacks built-in sounds, a midi2mod tool must either map MIDI tracks to specific samples or create a "skeleton" module that you then populate with samples in a tracker program.
Common Use Case: Developers use these tools to port music into games for systems like the Game Boy, where file size and channel count are extremely limited. Popular "midi2mod" Tools & Methods
GermanAizek / midi2mod (GitHub): A popular open-source utility designed for easy conversion between these formats.
JamesParkNINJA / midi2mod (GitHub): An experimental tool specifically noted for working best with simple MIDI files.
The OpenMPT Method: Many users prefer a manual "workaround" by importing a MIDI into OpenMPT (Open ModPlug Tracker), which allows for finer control over the resulting module's sound and structure.
Logic Pro Workaround: Pro users often narrow MIDI projects down to four tracks (matching Game Boy hardware) and export with specific settings to ensure track separation before module conversion. Key Technical Constraints
Track Limits: Standard MOD files often support only 4 channels (ProTracker standard).
Pattern Length: MIDI files often need to be truncated or adjusted to fit the standard MOD pattern length of 64 rows. midi2mod
Note Fidelity: Conversion is rarely "one-click" perfect; users often need to manually tweak the resulting file to fix volume, pitch slides, or instrument mapping.
Are you looking to convert music for a specific game engine (like GB Studio) or just for general tracker use? JamesParkNINJA/midi2mod: Convert a .mid file to a .mod
midi2mod is a utility (often found as community-developed scripts or tools) designed to convert MIDI (.mid) files into Tracker Module (.mod) files. It is primarily used by retro game developers—especially those using GB Studio—to bring modern compositions into hardware-constrained environments like the Nintendo Game Boy. Core Functionality
The tool attempts to map the note and velocity data from MIDI tracks into the pattern-based structure of a tracker module. Because MIDI is an abstract set of instructions (notes, timing, velocity) and MOD files rely on specific samples and fixed pattern lengths, the conversion is rarely a one-click process.
Note Mapping: Translates MIDI pitch data into the tracker’s note columns.
Sample Assignment: Since MIDI doesn't contain audio, users usually have to manually assign instrument samples to the converted tracks in a tracker like OpenMPT.
Pattern Resolution: Most tools convert MIDI ticks into tracker "rows," often requiring the user to set a specific pattern size (like 64 rows) to match the song's tempo. Popular Implementations
JamesParkNINJA/midi2mod: A common GitHub repository frequently cited in the GB Studio community for simple conversions. While MIDI files contain only note and control
GermanAizek/midi2mod: Another Python-based tool designed for "easy conversion" with variable results depending on the MIDI's complexity. Use in GB Studio Development
Developers use these tools as a "bridge" because the Game Boy's sound chip has very specific limitations:
Track Limit: MIDI files must often be simplified to 4 tracks to match the Game Boy's 4-channel sound chip (2 Pulse, 1 Wave, 1 Noise).
Conversion Workflow: Typically, a composer creates a track in a DAW (like FL Studio or Logic Pro), exports it as MIDI, runs it through a midi2mod script, and then cleans up the resulting file in a tracker to ensure it sounds correct on retro hardware. Challenges
Complexity: MIDI files with complex polyphony or overlapping notes often result in "messy" MOD patterns that require significant manual editing.
Effect Data: Specialized MIDI data like pitch bends or sustain usually don't convert natively and must be re-written as tracker commands. GBStudio .mod format explained in 10 minutes | OpenMPT
Here’s a practical guide for midi2mod — a conceptual tool (or script) that converts standard MIDI files into MOD (Amiga-style tracker) modules, typically used in demoscene, retro games, or chiptune music production.
8. Existing Tools for Inspiration
- Mid2Mod (Amiga OS4 – rare)
- MIDI2Tracker (Windows, 90s)
- mod2midi (reverse direction, learn from)
- Schism Tracker + manual import via keypress automation
Would you like a full working Python script that implements steps 1–6 in detail (including writing the raw .mod binary)? Mid2Mod (Amiga OS4 – rare) MIDI2Tracker (Windows, 90s)
Title: Bridging the Gap: Converting MIDI to MOD (The Ultimate Guide)
Introduction
Imagine you are a time traveler. You step out of your machine in 1992. The sights are flannel shirts, the sounds are grunge, and the background music of the computing world is the "Chiptune." But you want to bring your modern, polished MIDI compositions with you. How do you bridge the gap between the limitless polyphony of MIDI and the strict, memory-constrained world of Amiga modules?
You need a MIDI to MOD converter.
Whether you are a retro computing enthusiast, a Demoscene veteran, or a modern producer looking for that authentic 90s "tracker" sound, understanding how to convert MIDI to MOD is a journey into the heart of computer music history.
Step 5 – Effect Translation
| MIDI Event | MOD Effect |
|-----------------|----------------------------|
| Pitch Bend | E05 (Fine pitch slide) |
| Modulation (CC1)| 4xy (Vibrato) |
| Volume (CC7) | Cxy (Set volume) |
| Pan (CC10) | 8xy (Panning slide) |
| Note Off | 00 note cut or S0C |
Common Pitfalls and How to Fix Them
Even the best MIDI2MOD conversion can fail. Here is the troubleshooting guide:
| MIDI Problem | MOD Result | Solution | | :--- | :--- | :--- | | Sustain pedal (CC64) | Notes drone on forever, eating polyphony | In your MIDI editor, shorten all note lengths by 10%. | | Reverb/Send effects | Sounds like mud. MOD doesn't do sends. | Bake reverb into the sample itself before conversion. | | 120+ BPM with 64th notes | "Note cut" errors; missing triggers | Slow the MIDI tempo by 50%, convert, then double the MOD playback speed. | | Pitch bend wheel | Ignored or creates static clicks | Use portamento commands in the tracker manually after conversion. |
The Tools of the Trade
To perform this alchemy, you need the right software. While many ancient DOS tools have faded, several modern and classic options remain:
1. OpenMPT (Open ModPlug Tracker)
This is the gold standard for modern Windows users. OpenMPT can import MIDI files directly.
- The Workflow: You import the MIDI file. OpenMPT attempts to map the instruments to a default soundbank. You then swap out the default "beeps" for actual high-quality samples.
- Why it’s great: It handles modern VSTs, so you can use your modern sounds to render a "Modern MOD" (IT format) or stick to strict Amiga limits if you want that authentic crunch.
1. Understanding the Goal
- MIDI is event-based (note on/off, velocity, pitch bend, etc.), often multi-channel and polyphonic.
- MOD is a pattern-based tracker format (4–8 channels, samples, effects like vibrato/arpeggio).
- midi2mod maps MIDI tracks to MOD channels, quantizes timing to tracker resolution (usually 1/16 note ticks), and embeds MIDI note samples into raw PCM/WAV.