What this tool changes
Set or scale note-on velocity while preserving release events, controllers, programs, tempo, and track structure. Values are always kept between 1 and 127.
Dynamics tool
MIDI velocity editor
Set or scale note-on velocity while preserving release events, controllers, programs, tempo, and track structure. Values are always kept between 1 and 127.
Open this MIDI velocity editor tool
The interactive tool loads with JavaScript. MIDI parsing, editing, preview, undo, and download then run locally in your browser.
Load interactive toolWhat stays in the file
Events outside the selected operation remain in the low-level MIDI timeline. An untouched download returns the exact source bytes.
Supported files
Use an SMF Type 0 or Type 1 file with PPQ timing, up to 5 MB and 20,000 events.