Azure Speech

Azure Speech TTS provider — multilingual neural voices with SSML support.

Voice format: azure.<VoiceId>

Example: azure.en-US-AvaMultilingualNeural

No model ID segment — Azure voices are flat identifiers. Default voice: en-US-AvaMultilingualNeural.

Voice Samples

Voice	Language	Gender	Sample
azure.en-US-AvaMultilingualNeural	en-US	Female
azure.en-US-AndrewMultilingualNeural	en-US	Male

---

WebSocket

Query Parameters

Parameter	Type	Default	Description
audio_format	string	mp3	mp3, wav, linear16, mulaw, alaw.
sample_rate	integer	24000	8000, 16000, 24000, 48000.
language	string	en-US	BCP-47 language code.
text_type	string	text	text or ssml. Azure supports SSML for pronunciation and prosody control.

Voice Settings

Field	Type	Default	Description
output_format	string	audio-24khz-160kbitrate-mono-mp3	See Azure audio formats.
language_code	string	en-US	BCP-47. Overrides language query param.
text_type	string	text	text or ssml. Overrides query param.
effect	string	—	eq_car, eq_telecomhp8k. Audio equalization.
gender	string	—	Male, Female. Voice gender filter.

{
  "text": " ",
  "voice_settings": {
    "output_format": "audio-48khz-192kbitrate-mono-mp3",
    "effect": "eq_car"
  }
}

REST API

Fields

Field	Type	Default	Description
output_format	string	audio-24khz-160kbitrate-mono-mp3	Azure audio format string.
language_code	string	en-US	BCP-47 language code.
text_type	string	text	text or ssml.
effect	string	—	eq_car, eq_telecomhp8k.
gender	string	—	Male, Female.
output_type	string	binary_output	binary_output, base64_output, or audio_id.

Response

Default (binary_output): chunked audio bytes.

With output_type: "base64_output": JSON with base64-encoded audio.

With output_type: "audio_id": JSON with an audio_url for deferred retrieval.