Live Link Face vs Reactional Engine

Live Link Face captures facial performances and generates animation for MetaHuman characters in Unreal Engine. The iOS app supports real-time and processed animation and can capture raw video and depth data for the MetaHuman plugin. Epic describes the Android app as a beta for real-time MetaHuman facial animation. Animation streams over a network to Unreal Engine through the MetaHuman Live Link plugin; the phone and computer must be connected to a network. App settings include OSC connections for external controllers and devices. Android timecode can use the system clock, an NTP server, or a Tentacle Sync device for multi-device synchronization. Real-time Android animation is limited to certain Qualcomm chipsets, and Snapdragon 8s chipsets are unsupported; Android does not support capture for offline processing. Live Link Hub can download recorded media from Android and iOS devices and trigger recording on a connected phone. The app is free on iOS and Android. The App Store listing requires iOS 16 or later, while Epic’s workflow description specifies an iPhone 12 or later and a Windows 10/11 desktop PC.

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.