LiveKit Agents Plugin for SpatialReal Avatar

This plugin provides integration with SpatialReal's avatar service for lip-synced avatar rendering in LiveKit voice agents.

Installation

pip install livekit-plugins-spatialreal

Or install from source:

pip install -e .

Configuration

Set the following environment variables:

# Required
SPATIALREAL_API_KEY=your-api-key
SPATIALREAL_APP_ID=your-app-id
SPATIALREAL_AVATAR_ID=your-avatar-id

# Optional
SPATIALREAL_CONSOLE_ENDPOINT=
SPATIALREAL_INGRESS_ENDPOINT=

# LiveKit credentials
LIVEKIT_URL=
LIVEKIT_API_KEY=
LIVEKIT_API_SECRET=

Usage

from livekit.agents import Agent, AgentSession, JobContext, cli, WorkerOptions
from livekit.plugins import spatialreal


class VoiceAssistant(Agent):
    def __init__(self):
        super().__init__(instructions="You are a helpful voice assistant.")


async def entrypoint(ctx: JobContext):
    await ctx.connect()

    # Configure your pipeline components (VAD, STT, LLM, TTS)
    session = AgentSession(
        vad=vad,
        stt=stt,
        llm=llm,
        tts=tts,
    )

    # Initialize and start the avatar session
    avatar = spatialreal.AvatarSession()
    await avatar.start(session, room=ctx.room)

    # Start the agent session
    await session.start(
        agent=VoiceAssistant(),
        room=ctx.room,
    )


if __name__ == "__main__":
    cli.run_app(WorkerOptions(entrypoint_fnc=entrypoint))

For production agents, catch SpatialRealException so you can decide whether to fail the job or continue without avatar output:

try:
    await avatar.start(session, room=ctx.room)
except spatialreal.SpatialRealException as err:
    logger.error("Avatar startup failed: %s", err)
    raise

API Reference

AvatarSession

Main class for integrating SpatialReal avatars with LiveKit agents.

Constructor Parameters

Methods

• start(agent_session, room, *, livekit_url, livekit_api_key, livekit_api_secret): Start the avatar session and hook into the agent's audio output. Raises SpatialRealException with actionable context if startup fails.
• aclose(): Clean up avatar session resources.

When starting, the plugin automatically sets lk.publish_on_behalf to the agent participant identity for avatar worker association in LiveKit frontends.

SpatialRealException

Exception raised for SpatialReal-related errors.

How It Works

1. The plugin intercepts TTS audio output from the agent session
2. Audio frames are forwarded to SpatialReal's avatar service
3. SpatialReal generates lip-synced video and audio
4. The avatar joins the LiveKit room and publishes the synchronized streams

License

Apache-2.0