Change the velocity of your MIDI instruments

velpro header

What is it?

VelPro is a velocity fixer for your USB MIDI keyboard controllers. It runs on Windows® and OSX®.

VelPro lets you create a custom response curve for each note of your keyboard.

You may need it if you:

  • Are not satisfied with how your keyboard responds out of the box => correct its behaviour using our application.
  • Tend to hit the keys too soft or too hard (if you're used to a real piano for instance) => make your controller adapt to your touch.

To cope with the multitude of existing controllers, Velpro lets you customize:

  • The default response curve that will be applied to every note
  • Unless you tell it to use a specific curve:
    • For every black key
    • For every white key
    • For each individual note
    • For a selection of notes of your choice

Real life example

David uses a QRS PNOscan II MIDI strip sensor hidden into his upright Steinway Model F from 1885.

The sensor sends MIDI data to a Surface tablet running Pianoteq from Modartt to synthesize realistic piano sounds.

VelPro processes this MIDI data before it hits the synthesizer. This way, David can have the exact musical response expected from a real piano.

How to use it?

Step 1 : Toggle your controller
  • Plug your controller
  • Select and enable it
  • Change the default velocity response
Step 2 : Use VelPro as an input
In your favorite music app, select the [VelPro] prefixed MIDI input
Step 3 : Play on your keyboard as usual!
Play like you usually do. Your controller input automatically goes through VelPro before your music application. Bonus: Explore finer settings and set a different curve for individual keys by unchecking their "use default" box.

New in version 1.2

"Apply curve to notes..." dialog

Copy/paste a curve to any number of notes at once with this new dialog that lets you select all the notes on the keyboard that you want the current curve to be applied to.

New in version 1.1


  • PC with Windows® 8 up to Windows® 10 - 64bit.
  • Mac with OSX 10.9 or more recent.
  • A USB MIDI Controller Keyboard


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Only 39.90 €

Frequently Asked Questions

Download Demo Version

Demo version does not save your presets! Please consider purchasing a full license if you like the product and would like to unlock its full potential!