Deepgram STT

Overview

LiveKit Inference offers transcription powered by Deepgram. Pricing information is available on the pricing page.

Usage

To use Deepgram, pass a descriptor with the model and language to the stt argument in your AgentSession:

from livekit.agents import AgentSession

session = AgentSession(
    stt="deepgram/flux-general:en",
    # ... llm, tts, vad, turn_detection, etc.
)

import { AgentSession } from '@livekit/agents';

session = new AgentSession({
    stt="deepgram/flux-general:en",
    // ... llm, tts, vad, turn_detection, etc.
});

Multilingual transcription

Deepgram Nova-3 and Nova-2 models support multilingual transcription. In this mode, the model automatically detects the language of each segment of speech and can accurately transcribe multiple languages in the same audio stream.

Multilingual transcription is billed at a different rate than monolingual transcription. Refer to the pricing page for more information.

To enable multilingual transcription on supported models, set the language to multi.

Parameters

To customize additional parameters, including the language to use, use the STT class from the inference module:

from livekit.agents import AgentSession, inference

session = AgentSession(
    stt=inference.STT(
        model="deepgram/flux-general", 
        language="en"
    ),
    # ... llm, tts, vad, turn_detection, etc.
)

import { AgentSession, inference } from '@livekit/agents';

session = new AgentSession({
    stt: new inference.STT({ 
        model: "deepgram/flux-general", 
        language: "en" 
    }),
    // ... llm, tts, vad, turn_detection, etc.
});

Turn detection

Deepgram Flux includes a custom phrase endpointing model that uses both acoustic and semantic cues. To use this model for turn detection, set turn_detection="stt" in the AgentSession constructor. You should also provide a VAD plugin for responsive interruption handling.

session = AgentSession(
    turn_detection="stt",
    stt=inference.STT(
        model="deepgram/flux-general", 
        language="en"
    ),
    vad=silero.VAD.load(), # Recommended for responsive interruption handling
    # ... llm, tts, etc.
)

Additional resources

The following links provide more information about Deepgram in LiveKit Inference.