Keyswitch & Expression Map is a Max for Live device for Ableton Live that helps composers manage VST instrument articulations and expression parameters through keyswitches and MIDI CCs in a single, clear interface. It is designed for film and game scoring, orchestration, and complex sample-library setups.
I originally created KSEM for my own workflow because I could not find a comfortable, intuitive way to manage orchestral articulations in Ableton Live.
I love working with Ableton, but composing for orchestra often meant either spreading articulations across countless separate tracks and scrolling through them until I got dizzy, or relying on keyswitches and memorising MIDI notes and CC numbers that vary from library to library—and sometimes even between instruments within the same library.
Multi-Clip Editing in Live 10 was a fantastic addition and made orchestral composing more straightforward. Still, it did not quite offer the workflow I had in mind.
At the end of 2019, I found myself with a little free time between projects and spontaneously decided to build my own solution in Max for Live. Excited to finally have the workflow I had been waiting for—and encouraged by enthusiastic musician friends—I began developing the device further, aiming to make it useful to anyone looking for a more natural and intuitive way to perform or edit multiple articulations within a single track.
I tried to imagine what other Ableton users might need from such a device and released the first version in April 2020.
Since then, KSEM has grown into a small ecosystem, with freely available presets for popular sample libraries and more than 1,000 musicians and composers using it worldwide. That response has been both a huge compliment and a strong motivation to keep improving the device.
In 2026, I extensively redesigned KSEM and released version 5, introducing new workflow features and refinements informed by years of community feedback.
Originally published on my personal website, KSEM now has a dedicated home under Interfacette, the company I founded to give the project a more professional presence. Interfacette specialises in developing workflow tools for composers working in Ableton Live.
KSEM 5 in Ableton Live
The interface and articulation workflow I designed for working with virtual instruments and orchestral sample libraries.
Pad Controller with On-Screen Keyboard
Articulation Editor
CC Control
CC Mixer
Behind the Interface – Max for Live Development
A look behind the interface: this is where the logic behind KSEM is built, including MIDI processing, routing, user interaction and preset management. The device is developed entirely in Max for Live.
Presets
Over the years, KSEM has grown into a little ecosystem for orchestration within Ableton Live, with free presets for popular libraries from Spitfire Audio, Vienna Symphonic Library, Orchestral Tools, EastWest, and others. The idea is to save users from having to start from scratch and spend hours entering keyswitches and articulation names themselves. Instead, the presets are ready to use straight away. Furthermore, each preset comes with a PDF chart showing the library’s available articulations, how consistently they are supported across its instruments, and an overview of the MIDI CCs used to control parameters such as vibrato, dynamics, attack times, and more.
