MIDITrail
MIDITrail is a MIDI player for macOS that visualizes Standard MIDI files in 3D and other piano-roll style views while playing them.
What is MIDITrail?
MIDITrail is a MIDI player and visualization app for macOS maintained by WADA Masashi through the MIDITrail project website. Its main purpose is to play Standard MIDI files while showing animated visual representations of note data, including 3D piano-roll style views. The macOS version supports SMF format 0 and 1, drag-and-drop opening of MIDI files, folder playback, and multiple MIDI output ports for compatible devices or software setups. It also includes a real-time MIDI IN monitor, customizable viewpoints, graphics settings, color palette options, and an internal wavetable synthesizer in current releases. Users typically encounter it as a niche music and visualization tool for enjoying MIDI performances, testing MIDI files, or creating visually interesting playback on screen. It can be installed from the project website or the App Store, and the non-App Store build also supports command-line launching with a file argument.
Key features
- Plays Standard MIDI files in SMF format 0 and 1
- Shows animated 3D and piano-roll style visualizations during playback
- Supports drag-and-drop opening of MIDI files and folders
- Can play folders of MIDI files sequentially with repeat options
- Supports multiple MIDI OUT ports for compatible setups
- Includes real-time MIDI IN monitoring and MIDITHRU support
- Offers customizable viewpoints, color palettes, and graphics settings
- Includes an internal wavetable synthesizer with selectable .sf2 soundfont files
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Mostly safe
MIDITrail appears to be a legitimate MIDI visualization and playback application. It is a niche media tool rather than a system component, so it is generally low risk when obtained from the official site or the App Store. As with any software downloaded outside the App Store, users should verify the source and avoid unofficial mirrors or repackaged downloads.
Recommendation: Keep it if you use MIDI playback, visualization, or testing features. If you do not use MIDI tools, it is usually optional and can be removed without affecting macOS itself.
Common paths
/Applications/MIDITrail.app
Share your experience
Be the first to share your experience.