Deepgram Aura TTS

Deepgram Aura delivers low-latency streaming synthesis over a persistent WebSocket at wss://api.deepgram.com/v1/speak. Provider identifier: deepgram

Vault Credential

Key	Description
`key`	Deepgram API key from console.deepgram.com

Setup

Get a Deepgram API key

Add to Rapida vault

In the Rapida dashboard → Credentials → Create Credential, select provider Deepgram, enter key = your API key.The same credential is used for both STT (Deepgram Nova) and TTS (Deepgram Aura).

Configure the assistant

In the assistant settings → TTS Provider, select Deepgram.

Option	Example	Description
`voice`	`aura-asteria-en`	Aura voice model
`encoding`	`linear16`	Output encoding
`sample_rate`	`16000`	Output sample rate

Available voices: aura-asteria-en, aura-luna-en, aura-stella-en, aura-athena-en, aura-hera-en, aura-orion-en, aura-arcas-en, aura-perseus-en, aura-angus-en, aura-orpheus-en, aura-helios-en, aura-zeus-en

How It Works

// Initialize: connects to Deepgram Aura WebSocket
wss://api.deepgram.com/v1/speak?encoding=linear16&sample_rate=16000&model=<voice>

// Transform handles three packet types:
InterruptionPacket    → {"type":"Clear"}          // cancel queued audio
LLMResponseDeltaPacket → {"type":"Speak","text":"..."} // stream token
LLMResponseDonePacket  → {"type":"Flush"}          // trigger final synthesis

Deepgram STT

Deepgram Nova speech-to-text

TTS Overview

All TTS providers

Text-to-Speech — Overview

ElevenLabs TTS

Getting Started

Dashboard (UI)

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Vault Credential

Setup

How It Works

Deepgram STT

TTS Overview

​Vault Credential

​Setup

​How It Works

Deepgram STT

TTS Overview

Vault Credential

Setup

How It Works