For Mac

MIDISplitter

Turn a busy MIDI file into organized, playable parts. Rename tracks, pick instruments, audition one part or a hand-picked group, adjust tempo, transpose, balance volumes, split tracks, and merge the version you want to keep.

DAW-friendly MIDI cleanup

Reduces empty tracks and stray controller-only channel data so split and merged exports import cleanly in Reason and GarageBand.

MIDISplitter showing a loaded MIDI file with track rows, playback controls, and a visual timeline — Load a file and get a readable map of the arrangement: track names, channels, instruments, event counts, playback buttons, pitch, tempo, merge, split, and the timeline underneath.

Built for everyday MIDI cleanup.

MIDISplitter keeps the boring parts small, clear, and fast so you can get back to arranging, practicing, producing, or sharing stems.

Split all tracks or export only selected tracks.
Merge selected tracks into a new MIDI file.
Rename tracks and preserve those names in exports.
Change General MIDI instruments from a picker.
Use the Track Mixer to adjust volume before playback or export.
Transpose and adjust tempo for quick what-if checks.

Workflow

Pick the tracks, hear the result, then export exactly that.

Selection checkboxes make the file less mysterious. Choose the parts you want, audition the group, then send only those tracks to a merged file or a selected-track export.

MIDISplitter with four selected tracks, playback active, and merge and export buttons for the selected tracks — Checked tracks become the working set, with playback and export labels matching the selected count.

General MIDI instrument picker filtering and selecting Fretless Bass — Search and choose General MIDI instruments without memorizing program numbers.

Swap sounds quickly.

Use the instrument picker to move a part from the wrong patch to the right one before you listen or export.

Track Mixer window with volume sliders for each MIDI track — Balance every track from a compact mixer view.

Mix before committing.

Set per-track volume so auditions and exported arrangements sit closer to the way you want to hear them.

macOS output folder chooser with a Split All Here button — Choose the destination folder and split the file there.

Keep exports intentional.

MIDISplitter asks where the new files should go, then writes the split tracks into that folder.

Finder window showing twelve exported MIDI files with track and instrument names — Split files are named from the track and instrument, so the folder stays understandable.

Get labeled stems.

Exports arrive as separate MIDI files with readable names like drums, bass, guitar, melody, and synth parts.

macOS save dialog for a merged MIDI file named Dropped MIDI File Song_merged — Name the merged file before saving it.

Save a focused arrangement.

Merge the selected tracks into one new MIDI file when you want a playable subset of the original song.

Finder window showing the saved merged MIDI file — The merged file lands as a normal .mid file, ready for the next app in your workflow.

Move on cleanly.

The result is easy to find, easy to share, and small enough to take into the next stage without clutter.

MIDISplitter

DAW-friendly MIDI cleanup

Built for everyday MIDI cleanup.

Pick the tracks, hear the result, then export exactly that.

Swap sounds quickly.

Mix before committing.

Keep exports intentional.

Get labeled stems.

Save a focused arrangement.

Move on cleanly.

Available now at the Apple App Store.