Keith McMillen Instruments



Keith McMillen Instruments


Pearl and Keith McMillen Instruments have announced their entry into the MPE (Midi Polyphonic Expression) keyboard controller market with the K-Board Pro 4. The K-Board Pro 4 is a four-octave Midi keyboard controller based on the traditional look of a piano with multiple levels of touch sensitivity in each key. It sends attach velocity, release velocity, continuous pressure, horizontal position and vertical position data to offer the deepest level of musical expression.


This unique function is achieved by sending control messages to multiple midi channels, allowing the commands to be transmitted separately rather than the conventional method where the controls function globally and the effects are unison. K-Board Pro 4 features KMI's patented Smart Sensor Technology that is the core of all the KMI control surfaces. K-Board Pro 4 is USB powered and class compliant to ensure both portability and compatibility with MacOS, Windows iOS, Android as well as MIDI capable hardware.


Keith McMillen Product K-Board Pro 4



K-Board Pro 4 is a Multidimensional Polyphonic Expansion 48 key four octave keyboard that provides total control over all your hardware and software synthesizers using Smart Fabric Technology.

48 key, 4 Octave USB powered MPE Keyboard Controller.

Smart Fabric Technology with Traditional Keyboard Look.

5 Dimensions of Expression Within Each Key: Strike Velocity, Continuous Pressure, Y-Axis Control, X-Axis Control & Release Velocity.

4 Fully Programmable Horizontal Sliders.

Plug and Play with Class Compliant MIDI.

6 lbs With Rugged Aluminum Construction.


Get started

Manual (pdf)
Quick Start Guide (pdf)

Minimum System Requirements

・For Mac: Intel Core 2 Duo 2.3GHz (or greater), 100 MB free hard disk space, Mac OS 10.9 or later
・For Windows: 2.5 GHz processor (or greater), 4 GB RAM (or greater), USB 2.0 (or greater), 100 MB free hard disk space, Windows 7, 8, 8.1, & 10 (64-bit only)



K-Board Pro 4 Editor for Mac OSX
K-Board Pro 4 Editor for Windows
K-Board Pro 4 Web Editor. Web MIDI compatible browsers only. Currently; Chrome, Opera, and Brave.