SLNG Text-to-Speech API

Aura 2 (Spanish)

Endpointhttps://api.slng.ai

Real-time conversational TTS designed for voice agents with ultra-low latency

deepgram/aura:2-es - websocket

GET

https://api.slng.ai

/v1/tts/slng/deepgram/aura:2-es

Text-to-Speech API for generating speech from text using SLNG deepgram/aura. Real-time conversational TTS designed for voice agents with ultra-low latency

WebSocket Endpoint

Establishes a WebSocket connection for real-time text-to-speech.

Connection URL: wss://api.slng.ai/v1/tts/slng/deepgram/aura:2-es

deepgram/aura:2-es - websocket › Headers

Authorization

string · required

The Authorization header is used to authenticate with the API using your API key. Value is of the format Bearer YOUR_KEY_HERE.

Upgrade

string · enum · required

Enum values:

websocket

Connection

string · enum · required

Enum values:

Upgrade

X-Region-Override

string · enum

Optional. Specify a target region for this model. If not provided, the system will automatically select an appropriate region.

Enum values:

ap-southeast

ap-southeast-2

eu-west

eu-west-1

deepgram/aura:2-es - websocket › Request Body

oneOf

Exactly one variant must match.

Decision Table

Variant	Matching Criteria
	type = object · requires: type, model
	type = object · requires: type, text
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type

Properties for Init Message:

Initialize a session with voice and audio configuration.

type

const · required

Const value: init

model

string · required

Model identifier (e.g., aura:2)

Default: aura-asteria-en

voice

string

Voice model to use (e.g., aura-2-thalia-en)

object

Synthesis configuration options

deepgram/aura:2-es - websocket › Responses

Switching Protocols

oneOf

Exactly one variant must match.

Decision Table

Variant	Matching Criteria
	type = object · requires: type, session_id
	type = object · requires: type, data
	type = object · requires: type, segment_id
	type = object · requires: type, segment_id
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type, code, message

Properties for Ready Message:

Indicates session is ready for input.

type

const · required

Const value: ready

session_id

string · required

Unique session identifier

GET/v1/tts/slng/deepgram/aura:2-es

curl --request GET \
  --url https://api.slng.ai/v1/tts/slng/deepgram/aura:2-es \
  --header 'Authorization: <string>' \
  --header 'Connection: <string>' \
  --header 'Content-Type: application/json' \
  --header 'Upgrade: <string>' \
  --data '
{
  "type": "init",
  "model": "aura:2",
  "voice": "aura-2-thalia-en",
  "config": {
    "sample_rate": 24000,
    "encoding": "linear16",
    "language": "en"
  }
}
'

shell

Example Request Body

{
  "type": "init",
  "model": "aura:2",
  "voice": "aura-2-thalia-en",
  "config": {
    "sample_rate": 24000,
    "encoding": "linear16",
    "language": "en"
  }
}

json

application/json

Example Responses

{
  "type": "ready",
  "session_id": "session_abc123"
}

json

application/json

deepgram/aura:2-es - http

POST

https://api.slng.ai

/v1/tts/slng/deepgram/aura:2-es

Text-to-Speech API for generating speech from text using SLNG deepgram/aura. Real-time conversational TTS designed for voice agents with ultra-low latency

deepgram/aura:2-es - http › Headers

Authorization

string · required

The Authorization header is used to authenticate with the API using your API key. Value is of the format Bearer YOUR_KEY_HERE.

X-Region-Override

string · enum

Optional. Specify a target region for this model. If not provided, the system will automatically select an appropriate region.

Enum values:

ap-southeast

ap-southeast-2

eu-west

eu-west-1

deepgram/aura:2-es - http › Request Body

text

string · minLength: 1 · required

The text content to be converted to speech

model

string · enum

Allowed model names for deepgram/aura:2-es.

Enum values:

aura-2-agustina-es

aura-2-alvaro-es

aura-2-antonia-es

aura-2-aquila-es

aura-2-carina-es

aura-2-celeste-es

aura-2-diana-es

aura-2-estrella-es

Default: aura-2-agustina-es

language

string · enum

Allowed language codes for deepgram/aura:2-es.

Enum values:

es-419

es-AR

es-CO

es-ES

es-MX

Default: es

encoding

string · enum

Audio encoding format

Enum values:

linear16

mulaw

alaw

mp3

opus

flac

aac

Default: mp3

container

string · enum

Audio container format

Enum values:

wav

mp3

ogg

none

sample_rate

integer · enum

Sample rate in Hz

Enum values:

8000

16000

22050

24000

32000

44100

48000

bit_rate

integer

Bit rate for compressed formats. For mp3: 32000 or 48000 (default). For opus: 4000-650000. For aac: 4000-192000.

Default: 48000

callback

string · uri

URL to which we'll make the callback request

callback_method

string · enum

HTTP method by which the callback request will be made

Enum values:

POST

PUT

Default: POST

Label your requests for the purpose of identification during usage reporting

Arbitrary key-value pairs attached to the API response for downstream processing

deepgram/aura:2-es - http › Responses

Successful synthesis

string · binary

Audio file content

POST/v1/tts/slng/deepgram/aura:2-es

curl --request POST \
  --url https://api.slng.ai/v1/tts/slng/deepgram/aura:2-es \
  --header 'Authorization: <string>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "aura-2-celeste-es",
  "text": "Hola, esto es una prueba de síntesis de texto a voz.",
  "language": "es"
}
'

shell

Example Request Body

{
  "model": "aura-2-celeste-es",
  "text": "Hola, esto es una prueba de síntesis de texto a voz.",
  "language": "es"
}

json

application/json

Example Responses

<binary>

plain

audio/*

Aura 2 (English)Kokoro v1

deepgram/aura:2-es - websocket

GET

https://api.slng.ai

/v1/tts/slng/deepgram/aura:2-es

Text-to-Speech API for generating speech from text using SLNG deepgram/aura. Real-time conversational TTS designed for voice agents with ultra-low latency

WebSocket Endpoint

Establishes a WebSocket connection for real-time text-to-speech.

Connection URL: wss://api.slng.ai/v1/tts/slng/deepgram/aura:2-es

deepgram/aura:2-es - websocket › Headers

Authorization

string · required

The Authorization header is used to authenticate with the API using your API key. Value is of the format Bearer YOUR_KEY_HERE.

Upgrade

string · enum · required

Enum values:

websocket

Connection

string · enum · required

Enum values:

Upgrade

X-Region-Override

string · enum

Optional. Specify a target region for this model. If not provided, the system will automatically select an appropriate region.

Enum values:

ap-southeast

ap-southeast-2

eu-west

eu-west-1

deepgram/aura:2-es - websocket › Request Body

oneOf

Exactly one variant must match.

Decision Table

Variant	Matching Criteria
	type = object · requires: type, model
	type = object · requires: type, text
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type

Properties for Init Message:

Initialize a session with voice and audio configuration.

type

const · required

Const value: init

model

string · required

Model identifier (e.g., aura:2)

Default: aura-asteria-en

voice

string

Voice model to use (e.g., aura-2-thalia-en)

object

Synthesis configuration options

deepgram/aura:2-es - websocket › Responses

Switching Protocols

oneOf

Exactly one variant must match.

Decision Table

Variant	Matching Criteria
	type = object · requires: type, session_id
	type = object · requires: type, data
	type = object · requires: type, segment_id
	type = object · requires: type, segment_id
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type, code, message

Properties for Ready Message:

Indicates session is ready for input.

type

const · required

Const value: ready

session_id

string · required

Unique session identifier

curl --request GET \ --url https://api.slng.ai/v1/tts/slng/deepgram/aura:2-es \ --header 'Authorization: <string>' \ --header 'Connection: <string>' \ --header 'Content-Type: application/json' \ --header 'Upgrade: <string>' \ --data ' { "type": "init", "model": "aura:2", "voice": "aura-2-thalia-en", "config": { "sample_rate": 24000, "encoding": "linear16", "language": "en" } } '

deepgram/aura:2-es - http

POST

https://api.slng.ai

/v1/tts/slng/deepgram/aura:2-es

Text-to-Speech API for generating speech from text using SLNG deepgram/aura. Real-time conversational TTS designed for voice agents with ultra-low latency

deepgram/aura:2-es - http › Headers

Authorization

string · required

The Authorization header is used to authenticate with the API using your API key. Value is of the format Bearer YOUR_KEY_HERE.

X-Region-Override

string · enum

Optional. Specify a target region for this model. If not provided, the system will automatically select an appropriate region.

Enum values:

ap-southeast

ap-southeast-2

eu-west

eu-west-1

deepgram/aura:2-es - http › Request Body

text

string · minLength: 1 · required

The text content to be converted to speech

model

string · enum

Allowed model names for deepgram/aura:2-es.

Enum values:

aura-2-agustina-es

aura-2-alvaro-es

aura-2-antonia-es

aura-2-aquila-es

aura-2-carina-es

aura-2-celeste-es

aura-2-diana-es

aura-2-estrella-es

Default: aura-2-agustina-es

language

string · enum

Allowed language codes for deepgram/aura:2-es.

Enum values:

es-419

es-AR

es-CO

es-ES

es-MX

Default: es

encoding

string · enum

Audio encoding format

Enum values:

linear16

mulaw

alaw

mp3

opus

flac

aac

Default: mp3

container

string · enum

Audio container format

Enum values:

wav

mp3

ogg

none

sample_rate

integer · enum

Sample rate in Hz

Enum values:

8000

16000

22050

24000

32000

44100

48000

bit_rate

integer

Bit rate for compressed formats. For mp3: 32000 or 48000 (default). For opus: 4000-650000. For aac: 4000-192000.

Default: 48000

callback

string · uri

URL to which we'll make the callback request

callback_method

string · enum

HTTP method by which the callback request will be made

Enum values:

POST

PUT

Default: POST

Label your requests for the purpose of identification during usage reporting

Arbitrary key-value pairs attached to the API response for downstream processing

deepgram/aura:2-es - http › Responses

Successful synthesis

string · binary

Audio file content