Deepgram TTS

Overview

Deepgram text-to-speech is available in LiveKit Agents through LiveKit Inference and the Deepgram plugin. With LiveKit Inference, your agent runs on LiveKit's infrastructure to minimize latency. No separate provider API key is required, and usage and rate limits are managed through LiveKit Cloud. Use the plugin instead if you want to manage your own billing and rate limits. Pricing for LiveKit Inference is available on the pricing page .

LiveKit Inference

Use LiveKit Inference to access Deepgram TTS without a separate Deepgram API key.

Usage

To use Deepgram, use the TTS class from the inference module:

from livekit.agents import AgentSession, inference

session = AgentSession(
    tts=inference.TTS(
        model="deepgram/aura-2",
        voice="athena",
        language="en"
    ),
    # ... stt, llm, vad, turn_handling, etc.
)

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

session = new AgentSession({
    tts: new inference.TTS({
        model: "deepgram/aura-2",
        voice: "athena",
        language: "en"
    }),
    // ... stt, llm, vad, turnHandling, etc.
});

Parameters

Model parameters

Pass the following parameters inside extra_kwargs (Python) or modelOptions (Node.js):

Voices

LiveKit Inference supports Deepgram Aura voices. You can explore the available voices in the Deepgram voice library , and use the voice by copying its name into your LiveKit agent session.

The following is a small sample of the Deepgram voices available in LiveKit Inference.

String descriptors

As a shortcut, you can also pass a descriptor with the model ID and voice directly to the tts argument in your AgentSession:

from livekit.agents import AgentSession

session = AgentSession(
    tts="deepgram/aura-2:athena",
    # ... stt, llm, vad, turn_handling, etc.
)

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

session = new AgentSession({
    tts: "deepgram/aura-2:athena",
    // ... stt, llm, vad, turnHandling, etc.
});

Plugin

LiveKit's plugin support for Deepgram lets you connect directly to Deepgram's TTS API with your own API key. The plugin provides two TTS classes with separate voices and API endpoints. Use the TTS class for Deepgram's established Aura voices on /v1/speak. Use the TTSv2 class for the newer Flux voices on /v2/speak.

Installation

Install the plugin:

uv add "livekit-agents[deepgram]~=1.5"

pnpm add @livekit/agents-plugin-deepgram@1.x

Authentication

The Deepgram plugin requires a Deepgram API key .

Set DEEPGRAM_API_KEY in your .env file.

Aura

The TTS class covers Deepgram's Aura-2 and Aura-1 voices.

Usage

Use Deepgram Aura TTS within an AgentSession or as a standalone speech generator. For example, you can use this TTS in the Voice AI quickstart.

from livekit.plugins import deepgram

session = AgentSession(
   tts=deepgram.TTS(
      model="aura-2-asteria-en",
   )
   # ... llm, stt, etc.
)

import * as deepgram from '@livekit/agents-plugin-deepgram';

const session = new voice.AgentSession({
    tts: new deepgram.TTS({
        model: "aura-2-asteria-en",
    }),
    // ... llm, stt, etc.
});

Parameter reference

This section describes some of the available parameters. See the plugin reference for a complete list of all available parameters.

Flux

The TTSv2 class covers Deepgram's Flux voices.

Usage

Use TTSv2 within an AgentSession or as a standalone speech generator. For example, you can use this TTS in the Voice AI quickstart.

from livekit.plugins import deepgram

session = AgentSession(
   tts=deepgram.TTSv2(
      model="flux-alexis-en",
   ),
   # ... llm, stt, etc.
)

Parameter reference

This section describes some of the available parameters. See the plugin reference in Additional resources for a complete list of all available parameters.

Prompting

Deepgram supports filler words and natural pauses through prompting. To learn more, see Text to Speech Prompting .

Additional resources

The following resources provide more information about using Deepgram with LiveKit Agents.

Python package

The livekit-plugins-deepgram package on PyPI.

Plugin reference

Reference for the Deepgram TTS plugin.

GitHub repo

View the source or contribute to the LiveKit Deepgram TTS plugin.

Deepgram docs

Deepgram's full docs site.

Voice AI quickstart

Get started with LiveKit Agents and Deepgram.

Deepgram STT

Guide to the Deepgram STT plugin with LiveKit Agents.