What this tool changes
Reshape every positive note-on velocity with a gamma curve. Use a value below one to lift quiet notes, or a value above one to soften the loudest hits.
Dynamics shaping
MIDI velocity curve
Reshape every positive note-on velocity with a gamma curve. Use a value below one to lift quiet notes, or a value above one to soften the loudest hits.
Local file processing
1 Open2 Edit3 Preview4 Undo if needed5 Download
Open a MIDI file
Stay on-device. Start empty if you have no file, or try a public demo.
Off-grid notes, wild velocities, leftover gaps — the dirty AI-song export producers actually get.
A clean four-bar piano phrase you can transpose, quantize, or reshape immediately.
Drums, bass, and chords on separate tracks for mute, solo, and merge practice.
The same hook after quantize and velocity cleanup — the after shot for the messy export.
Your file stays on this device unless you explicitly use Creator Cloud. After an edit, one local recovery copy is saved in this browser until you replace or clear it.
Creator Cloud
Keep the versions and extend the phrase.
Creator Cloud adds cloud history and reviewed AI MIDI edits a month. The tool you are using stays free.
- 60 reviewed AI MIDI edits each month
- 50 cloud projects with 100 versions each
- Cancel anytime; the free editor stays free
What stays in your MIDI
Events outside the selected operation remain in the low-level timeline. Downloading before any edit returns the exact source bytes.
Drop the export into a DAW
- Download the edited file. The name starts with editmidi- so it is easy to spot in a DAW project.
- In FL Studio, Ableton, or Logic, create or open a MIDI track and import that .mid onto the clip or arrangement.
- Audition the destination instrument. MIDI is instructions, so the sound comes from the synth you attach in the DAW.
How the gamma curve works
Each note velocity is normalized to a value between zero and one, raised to the selected gamma, and converted back to the 1–127 range. A gamma below one increases low velocities more than high ones. A gamma above one reduces low velocities and compresses the loud end.
This is a global response curve, not a per-track mixer. It keeps the relative order of velocities, so a note that was louder than another stays louder. It does not change note timing, controllers, pitch bend, or program changes.
When to use a curve instead of a fixed velocity
Use a curve when the dynamics are in the right shape but the overall response feels too flat or too aggressive. A fixed velocity tool is better when you want every note to hit the same level, such as a drum machine or a layered pad.
A curve is also useful after importing MIDI from a device whose velocity response differs from your soft synth. Try a gentle change first, then audition the result through the instrument that will actually play the file.
Drums and destination instruments
Drum channel 10 is excluded by default because percussion velocity often controls sample selection or timbre rather than loudness. Enable it when you want the entire file reshaped, then check for lost ghost notes or accented hits that no longer read.
Velocity is an instruction, not a loudness guarantee. A synth may map velocity to volume, filter cutoff, sample layer, or nothing at all. The browser preview is a quick check; the destination instrument is the real test.
Undo and export
Applying a curve is one undoable edit. If the result is too strong, Undo restores the previous dynamics, then try a gamma closer to one. Download MIDI creates a separate file and leaves the original source untouched.
The operation runs locally and does not upload the MIDI. It is bounded by the same 20,000-event editor limit, and every changed velocity is validated before the new document is committed.
Keep the same fileAll EditMIDI tools
Open the full index
Every page runs on the same browser MIDI engine, so you can move between them without uploading or re-importing your file.
- MIDI editor online — edit notes, tracks, and velocity in the browser
- MIDI player online — preview tracks, scrub, and loop without uploading
- Transpose MIDI online — change key without losing tempo or controllers
- Change MIDI BPM online — replace a tempo map with one steady value
- Quantize MIDI online — snap note starts and ends to a musical grid
- MIDI velocity editor — set note dynamics from 1 to 127
- MP3 to MIDI converter — turn a melody into an editable piano roll
- Audio to MIDI — sketch one melody from a local recording
- Suno MIDI cleanup — quantize and fix messy AI exports
- MIDI to MP3 — render a MIDI file to WAV or MP3 in this browser
- Piano roll viewer — see every note, pitch, and length in a .mid file
- WAV to MIDI converter — draft notes from an uncompressed recording
- Vocal to MIDI — turn a hummed or sung line into editable notes
- MIDI key finder — estimate the key, relative key, and Camelot code
- Merge MIDI files — combine two .mid files into one multi-track project
- MIDI file checker — inspect structure, channels, tempo, and compatibility risks
- MIDI duration calculator — read seconds, bars, beats, and tempo points
- MIDI to CSV — export one row per note for a spreadsheet
- MIDI to JSON — export a versioned structured note object for apps and AI
- MIDI to video — record a vertical, square, or widescreen piano-roll clip
- MIDI cover art generator — export a 1500px PNG from the note pattern
- Humanize MIDI — add bounded timing and velocity variation with a repeatable seed
- MIDI note length editor — make notes shorter, legato, or staccato
- MIDI to WAV — render uncompressed 44.1 or 48 kHz audio locally