FMOD Studio vs Reactional Engine
FMOD Studio
fmod.comReactional Engine
reactionalmusic.comSide by side
| Figure | FMOD Studio | Reactional Engine |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | — | Yes |
| Plans published | 3 | 2 |
| Spec score · Game Audio Middleware | 8.5 (#5) | 7.8 (#14) |
| Headquarters | Melbourne, Australia | Stockholm, Sweden |
| Integrations | FMOD Studio is ready to use with Unity and Unreal and can integrate with other engines through its API. | Unity and Unreal are available now, Godot is listed as coming soon, and Wwise and FMOD integrations are described on the engine page. |
| Purpose | FMOD Studio is an end-to-end solution for creating adaptive game audio and playing it in-game through the FMOD Engine. | Reactional Engine is a framework for generating interactive music note by note in games and reacting to gameplay in real time. |
| Support | FMOD lists free community forum support and email technical support for licensed users; licensing includes one year of email support with Basic and two years with Premium. | The engine page links to integration support and documentation; the pricing table lists Forum + Discord for Free and dedicated contact for Studio. |
Plans
In their own words
FMOD Studio
FMOD Studio is an end-to-end solution for creating adaptive game audio and playing it in-game through the FMOD Engine. Its event editor supports instruments, effects, randomization, modulation, multitrack music, and automated effects. The mixer routes signals, applies DSP effects to event groups, and uses prioritized snapshots for dynamic mixing. A built-in profiler can capture and simulate gameplay, then inspect events, 3D positions, parameters, API calls, voice, levels, and CPU usage. Live Update lets users monitor levels and snapshots while hearing changes on a connected game device. FMOD Studio is ready to use with Unity and Unreal, and other engines can connect through its API using C++ or C#. Team workflow features include shared presets, integrated source control, and profiler sessions for communication with outsourced sound teams. It runs on Linux, macOS, and Windows. Licensing is per game: Indie is free under stated budget and revenue conditions, Basic costs 6000.00 USD once, and Premium costs 18000.00 USD once. Non-game projects require custom pricing.
Reactional Engine
Reactional Engine is a framework for generating music note by note in games and changing it as gameplay unfolds. It uses virtual instruments rather than loop-based systems, with controls for key, scale, tempo, and instrumentation. The engine can interpolate, modulate, improvise, and randomize musical elements. It can analyze commercial tracks for tempo and harmony to synchronize generated music and support transitions between generated and commercial material. Unity and Unreal Engine integrations are available; Wwise and FMOD integrations are described, while Godot is listed as coming soon. Runtime targets include Windows, macOS, Linux, iOS, Android, WebGL, PlayStation 4/5, Xbox, and Nintendo Switch. API examples cover transport controls, musical settings, stinger triggers, and callbacks for bars, beats, and notes. Windows and macOS binaries are available through the Reactional Platform. Developers can test any track for free and pay on release. Commercial music licensing is described with worldwide perpetual rights, and interactive themes start at $75 per track. Pricing is on request for Studio; Free access is listed at free.