MIDITrail
MIDITrail is a macOS MIDI player that turns Standard MIDI files into animated 3D visualizations while playing them back.
What is MIDITrail?
MIDITrail is a MIDI player for macOS that helps you listen to Standard MIDI files while viewing them as animated 3D note displays. It is designed for people who enjoy MIDI music, keyboard performance visuals, and music-focused screen presentations. The app supports SMF format 0 and 1 files, can open individual MIDI files or play files from a folder in sequence, and offers multiple visual styles such as piano roll views. It also supports multiple MIDI output ports for more complex playback setups. On Mac, users can open MIDI files directly, drag and drop them into the app window, and control playback speed and navigation during playback. MIDITrail is published by WADA Masashi on the MIDITrail project website and is also available on other platforms, but this entry refers to the macOS app.
Key features
- Play Standard MIDI files in SMF format 0 and 1.
- Show MIDI notes as animated 3D visualizations while music plays.
- Open a single MIDI file or play MIDI files from a folder in sequence.
- Drag and drop MIDI files or folders into the app window.
- Control playback with pause, resume, stop, skip, and speed changes.
- Use multiple MIDI output ports for multi-port MIDI data.
- Choose from different visual display styles such as piano roll views.
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Safety overview
Status: Mostly safe
MIDITrail is a legitimate MIDI visualization app for macOS. Its file access and MIDI output behavior are consistent with its purpose, since it needs to open MIDI files and send playback to a selected MIDI output device. If you use the internal synthesizer, review any soundfont or wavetable files you load from outside sources, because those files are not part of the app itself. A preference file named jp.sourceforge.users.yknk.MIDITrail.plist may be created in your user Library to store settings such as window and view preferences.
Recommendation: Keep MIDITrail if you use your Mac to play or visualize MIDI files, especially for music practice, demos, or screen recordings. If you do not use MIDI playback or note-visualization tools, you can remove the app and you will only lose its playback settings and saved preferences.
Common paths
/Applications/MIDITrail.app
Preference paths
~/Library/Preferences/jp.sourceforge.users.yknk.MIDITrail.plist
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