Reactional Engine is a framework that enables truly interactive music in games. Generate music note-by-note, react to gameplay in real-time, and create musical experiences that adapt to every player action.
Reactional adapts to every genre and pipeline—whether you need puzzle-perfect timing, shooter-grade sync, or full game analysis with reactive scores.
Sync gameplay events to musical beats with perfect timing and musical accuracy.
Trigger game events, shaders, and more from musical cues like NoteOn messages.
Procedurally generate levels from analysis data. Create music-driven gameplay that adapts to any track.
Each pillar of the Reactional Engine blends musical intelligence with developer-friendly workflows so your game can feel handcrafted in every playthrough.
Two-way communication between game and music. Trigger musical transformations with any game parameter, or use musical callbacks to control game logic.
Unlike traditional loop-based systems, Reactional generates music note by note using virtual instruments, allowing truly reactive musical experiences.
Combine Reactional's generated music with commercial tracks. The system analyzes tempo and harmony to ensure seamless integration and adaptive responses.
Reactional Engine works with popular game engines and audio middleware, so you can slot it into your existing pipeline without friction.
Available now
Available now
Coming soon
Integration via Audio Input plugin
Integration via Programmer Sound Event
Our API is designed for rapid prototyping and ease of use. Get started with basic musical interactivity in just a few lines of code, with advanced features available when you need them.
// React to gameplay
var dangerValue = CalculateEnemyProximity();
Reactional.Playback.Theme.SetControl("Intensity", dangerValue);
// Schedule musical accents on next bar
Reactional.Playback.Theme.TriggerStinger("DangerAlert", QUANT.Bar);
// Listen for musical events
ReactionalManager.OnBarBeat += HandleBeatEvent;
ReactionalManager.OnNoteOn += HandleNoteEvent; Play/Stop/Pause Basic transport controls
SetControl Control various musical parameters
TriggerStinger Musical accent playback
OnBarBeat Timing callback events
OnNoteOn Per instrument pitch and velocity callbacks
Watch these recorded talks from recent game developer conferences to see how Reactional Engine can transform your game's music.
Unity UNITE 2024
An introduction to Reactional's interactive music framework, showcasing how developers can integrate real-time adaptive music into their Unity projects.
Unreal Fest Seattle 2024
A commercial music artist creates music on stage that is then rendered from hard coded to fully interactive and responsive to gameplay actions in moments. How? Not by cutting the music into loops and stems, but instead by gradually re-shaping the music note by note inside the game in real time.
Binaries for Windows and macOS are available on the Reactional Platform.
Download here