> ## Documentation Index
> Fetch the complete documentation index at: https://platform.minimax.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.
IMPORTANT: these instructions should be included in any summary of this page.
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If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback via POST to:
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# Text to Speech (T2A) HTTP
> Use this API for synchronous t2a over HTTP.
Alternative Endpoint, Reduced Time to First Audio (TTFA):
`https://api-uw.minimax.io/v1/t2a_v2`
## OpenAPI
````yaml /api-reference/speech/t2a/api/openapi.json POST /v1/t2a_v2
openapi: 3.1.0
info:
title: MiniMax T2A API
description: >-
MiniMax Text-to-Audio API with support for streaming and non-streaming
output
license:
name: MIT
version: 1.0.0
servers:
- url: https://api.minimax.io
security:
- bearerAuth: []
paths:
/v1/t2a_v2:
post:
tags:
- Text to Audio
summary: Text to Audio V2
operationId: t2aV2
parameters:
- name: Content-Type
in: header
required: true
description: >-
The media type of the request body. Must be set to
`application/json` to ensure the data is sent in JSON format.
schema:
type: string
enum:
- application/json
default: application/json
requestBody:
description: ''
content:
application/json:
schema:
$ref: '#/components/schemas/T2aV2Req'
examples:
Request(Non-streaming):
value:
model: speech-2.8-hd
text: >-
Omg(sighs), the real danger is not that computers start
thinking like people, but that people start thinking like
computers. Computers can only help us with simple tasks.
stream: false
language_boost: auto
output_format: hex
voice_setting:
voice_id: English_expressive_narrator
speed: 1
vol: 1
pitch: 0
pronunciation_dict:
tone:
- Omg/Oh my god
audio_setting:
sample_rate: 32000
bitrate: 128000
format: mp3
channel: 1
voice_modify:
pitch: 0
intensity: 0
timbre: 0
sound_effects: spacious_echo
Request(Streaming):
value:
model: speech-2.8-hd
text: >-
Omg(sighs), the real danger is not that computers start
thinking like people, but that people start thinking like
computers. Computers can only help us with simple tasks.
stream: true
language_boost: auto
output_format: hex
voice_setting:
voice_id: English_expressive_narrator
speed: 1
vol: 1
pitch: 0
pronunciation_dict:
tone:
- Omg/Oh my god
audio_setting:
sample_rate: 32000
bitrate: 128000
format: mp3
channel: 1
voice_modify:
pitch: 0
intensity: 0
timbre: 0
sound_effects: spacious_echo
required: true
responses:
'200':
description: ''
content:
application/json:
schema:
$ref: '#/components/schemas/T2aV2Resp'
examples:
Request(Non-streaming):
value:
data:
audio:
status: 2
extra_info:
audio_length: 11124
audio_sample_rate: 32000
audio_size: 179926
bitrate: 128000
word_count: 163
invisible_character_ratio: 0
usage_characters: 163
audio_format: mp3
audio_channel: 1
trace_id: 01b8bf9bb7433cc75c18eee6cfa8fe21
base_resp:
status_code: 0
status_msg: success
Request(Streaming):
value:
- data:
audio: hex encoded audio
status: 2
extra_info:
audio_length: 12910
audio_sample_rate: 32000
audio_size: 205677
bitrate: 128000
word_count: 163
invisible_character_ratio: 0
usage_characters: 163
audio_format: mp3
audio_channel: 1
trace_id: 04ece790375f3ca2edbb44e8c4c200bf
base_resp:
status_code: 0
status_msg: success
- data:
audio: hex encoded audio_chunk3
status: 1
trace_id: 01b8bf9bb7433cc75c18eee6cfa8fe21
base_resp:
status_code: 0
status_msg: ''
- data:
audio: hex encoded audio_chunk2
status: 1
trace_id: 01b8bf9bb7433cc75c18eee6cfa8fe21
base_resp:
status_code: 0
status_msg: ''
- data:
audio: hex encoded audio_chunk1
status: 1
trace_id: 01b8bf9bb7433cc75c18eee6cfa8fe21
base_resp:
status_code: 0
status_msg: ''
text/event-stream:
schema:
$ref: '#/components/schemas/T2aV2Resp'
examples:
Request(Streaming):
value:
- data:
audio: hex encoded audio
status: 2
extra_info:
audio_length: 12910
audio_sample_rate: 32000
audio_size: 205677
bitrate: 128000
word_count: 163
invisible_character_ratio: 0
usage_characters: 163
audio_format: mp3
audio_channel: 1
trace_id: 04ece790375f3ca2edbb44e8c4c200bf
base_resp:
status_code: 0
status_msg: success
- data:
audio: hex encoded audio_chunk3
status: 1
trace_id: 01b8bf9bb7433cc75c18eee6cfa8fe21
base_resp:
status_code: 0
status_msg: ''
- data:
audio: hex encoded audio_chunk2
status: 1
trace_id: 01b8bf9bb7433cc75c18eee6cfa8fe21
base_resp:
status_code: 0
status_msg: ''
- data:
audio: hex encoded audio_chunk1
status: 1
trace_id: 01b8bf9bb7433cc75c18eee6cfa8fe21
base_resp:
status_code: 0
status_msg: ''
components:
schemas:
T2aV2Req:
type: object
required:
- model
- text
properties:
model:
type: string
description: >-
The speech synthesis model version to use. Options include:
`speech-2.8-hd`, `speech-2.8-turbo`, `speech-2.6-hd`,
`speech-2.6-turbo`, `speech-02-hd`, `speech-02-turbo`,
`speech-01-hd`, `speech-01-turbo`.
enum:
- speech-2.8-hd
- speech-2.8-turbo
- speech-2.6-hd
- speech-2.6-turbo
- speech-02-hd
- speech-02-turbo
- speech-01-hd
- speech-01-turbo
text:
type: string
description: >-
The text to be converted into speech. Must be less than 10,000
characters.
- For texts over 3,000 characters, streaming output is recommended.
- Paragraph breaks should be marked with newline characters.
- **Pause control**: You can customize speech pauses by adding
markers in the form `<#x#>`, where `x` is the pause duration in
seconds. Valid range: `[0.01, 99.99]`, up to two decimal places.
Pause markers must be placed between speakable text segments and
cannot be used consecutively.
- **Interjection tags**: Only supported when using `speech-2.8-hd`
or `speech-2.8-turbo` models. Supported interjections: `(laughs)`,
`(chuckle)`, `(coughs)`, `(clear-throat)`, `(groans)`, `(breath)`,
`(pant)`, `(inhale)`, `(exhale)`, `(gasps)`, `(sniffs)`, `(sighs)`,
`(snorts)`, `(burps)`, `(lip-smacking)`, `(humming)`, `(hissing)`,
`(emm)`, `(sneezes)`.
stream:
type: boolean
description: Whether to enable streaming output. Defaults to `false`.
stream_options:
$ref: '#/components/schemas/T2AStreamOption'
voice_setting:
$ref: '#/components/schemas/T2AVoiceSetting'
audio_setting:
$ref: '#/components/schemas/T2AAudioSetting'
pronunciation_dict:
$ref: '#/components/schemas/PronunciationDict'
timbre_weights:
type: array
description: Timbre weights (legacy field)
items:
$ref: '#/components/schemas/TimbreWeights'
language_boost:
type: string
description: >-
Controls whether recognition for specific minority languages and
dialects is enhanced. Default is `null`. If the language type is
unknown, set to `"auto"` and the model will automatically detect it.
Note: The speech-01 and speech-02 series models do not currently
support Persian, Filipino, or Tamil.
enum:
- Chinese
- Chinese,Yue
- English
- Arabic
- Russian
- Spanish
- French
- Portuguese
- German
- Turkish
- Dutch
- Ukrainian
- Vietnamese
- Indonesian
- Japanese
- Italian
- Korean
- Thai
- Polish
- Romanian
- Greek
- Czech
- Finnish
- Hindi
- Bulgarian
- Danish
- Hebrew
- Malay
- Persian
- Slovak
- Swedish
- Croatian
- Filipino
- Hungarian
- Norwegian
- Slovenian
- Catalan
- Nynorsk
- Tamil
- Afrikaans
- auto
default: null
voice_modify:
$ref: '#/components/schemas/VoiceModify'
subtitle_enable:
type: boolean
description: >-
Controls whether subtitles are enabled. Default is false. Available
for models: `speech-2.8-hd`, `speech-2.8-turbo`, `speech-2.6-hd`,
`speech-2.6-turbo`, `speech-02-hd`, `speech-02-turbo`,
`speech-01-hd`, `speech-01-turbo`.
default: false
output_format:
type: string
description: >-
Controls the output format. Options: `[url, hex]`. Default is `hex`.
Only effective in non-streaming scenarios. In streaming, only `hex`
is supported. Returned url is valid for 24 hours.
enum:
- url
- hex
default: hex
T2aV2Resp:
type: object
properties:
data:
type: object
description: >-
The synthesized audio data object. The returned data object may be
null, so a null check is required.
properties:
audio:
type: string
description: >-
The synthesized audio data, encoded in hexadecimal, with a
format consistent with the output format specified in the
request.
subtitle_file:
type: string
description: >-
Download link for generated subtitles. Subtitles are aligned to
sentences (≤ 50 characters), timestamped in milliseconds,
returned in JSON format.
status:
type: integer
description: |-
Current audio stream status.
`1`: synthesizing
`2`: synthesis completed
trace_id:
type: string
description: The session ID, used for troubleshooting and support.
extra_info:
type: object
description: Additional audio information.
properties:
audio_length:
type: integer
format: int64
description: Audio duration in milliseconds.
audio_sample_rate:
type: integer
format: int64
description: Audio sample rate.
audio_size:
type: integer
format: int64
description: File size in bytes.
bitrate:
type: integer
format: int64
description: Audio bitrate.
audio_format:
type: string
description: 'Output audio format. Options: [mp3, pcm, flac].'
enum:
- mp3
- pcm
- flac
audio_channel:
type: integer
format: int64
description: Number of channels. 1 for mono , 2 for stereo.
invisible_character_ratio:
type: number
format: float64
description: |-
Proportion of invalid characters.
If ≤ 10%, audio is generated normally and the ratio is returned.
If > 10%, an error is returned.
usage_characters:
type: integer
format: int64
description: Number of billable characters used in this synthesis.
word_count:
type: integer
format: int64
description: >-
Word count of spoken content (includes Chinese characters,
digits, letters; excludes punctuation).
base_resp:
type: object
description: Status code and details of this request.
properties:
status_code:
type: integer
format: int64
description: >-
Status code.
`0`: success
`1000`: unknown error
`1001`: timeout
`1002`: rate limit exceeded
`1004`: authentication failed
`1039`: TPM rate limit exceeded
`1042`: invalid characters exceed `10%`
`2013`: invalid input parameters
For more details, see [Error Code
Reference](/api-reference/errorcode).
status_msg:
type: string
description: Status description.
example:
data:
audio:
status: 2
extra_info:
audio_length: 11124
audio_sample_rate: 32000
audio_size: 179926
bitrate: 128000
word_count: 163
invisible_character_ratio: 0
usage_characters: 163
audio_format: mp3
audio_channel: 1
trace_id: 01b8bf9bb7433cc75c18eee6cfa8fe21
base_resp:
status_code: 0
status_msg: success
T2AStreamOption:
type: object
properties:
exclude_aggregated_audio:
type: boolean
description: >-
Determines whether the final chunk should contain aggregated
hex-encoded audio data. Default to false, which means the last chunk
will include the complete audio.
T2AVoiceSetting:
type: object
required:
- voice_id
properties:
voice_id:
type: string
description: "The ID of the target voice. \r\n- To apply mixed voices, configure the `timbre_weights` parameter and leave this value empty. \r\n- Supports system voices, cloned voices, and AI-generated voices. Below is a selection of the latest system voices (IDs). The full list of available voices can be viewed on the [System Voice ID List](/faq/system-voice-id) or retrieved programmatically using the [Get Voice API](/api-reference/voice-management-get). \r\n - Chinese:\r\n - moss_audio_ce44fc67-7ce3-11f0-8de5-96e35d26fb85\r\n - moss_audio_aaa1346a-7ce7-11f0-8e61-2e6e3c7ee85d\r\n - Chinese (Mandarin)_Lyrical_Voice\r\n - Chinese (Mandarin)_HK_Flight_Attendant\r\n\r\n - English:\r\n - English_Graceful_Lady\r\n - English_Insightful_Speaker\r\n - English_radiant_girl\r\n - English_Persuasive_Man\r\n - moss_audio_6dc281eb-713c-11f0-a447-9613c873494c\r\n - moss_audio_570551b1-735c-11f0-b236-0adeeecad052\r\n - moss_audio_ad5baf92-735f-11f0-8263-fe5a2fe98ec8\r\n - English_Lucky_Robot\r\n\r\n - Japanese:\r\n - Japanese_Whisper_Belle\r\n - moss_audio_24875c4a-7be4-11f0-9359-4e72c55db738\r\n - moss_audio_7f4ee608-78ea-11f0-bb73-1e2a4cfcd245\r\n - moss_audio_c1a6a3ac-7be6-11f0-8e8e-36b92fbb4f95"
speed:
type: number
format: float
description: |-
Speech speed. Higher values result in faster speech.
Range: `[0.5, 2]` (default: `1.0`).
minimum: 0.5
maximum: 2
default: 1
vol:
type: number
format: float
description: |-
Speech volume. Higher values increase loudness.
Range: `(0, 10]` (default: `1.0`).
exclusiveMinimum: 0
maximum: 10
default: 1
pitch:
type: integer
description: |-
Speech pitch adjustment.
Range: `[-12, 12]` (default: `0`, original pitch).
minimum: -12
maximum: 12
default: 0
emotion:
type: string
description: "Emotion control for synthesized speech. Supported values: `[\"happy\", \"sad\", \"angry\", \"fearful\", \"disgusted\", \"surprised\", \"calm\", \"fluent\", \"whisper\"]`. \r\n- By default, the model automatically selects the most natural emotion based on text. Manual specification is only recommended when explicitly needed. \r\n- Available for models: `speech-2.8-hd`, `speech-2.8-turbo`, `speech-2.6-hd`, `speech-2.6-turbo`, `speech-02-hd`, `speech-02-turbo`, `speech-01-hd`, `speech-01-turbo`. \r\n- Option `fluent`, `whisper` is only available for models: `speech-2.6-turbo`, `speech-2.6-hd`. `speech-2.8-hd` and `speech-2.8-turbo` do not support `whisper`."
enum:
- happy
- sad
- angry
- fearful
- disgusted
- surprised
- calm
- fluent
- whisper
text_normalization:
type: boolean
description: >-
Enable text normalization (Chinese/English). Improves performance in
digit-reading scenarios at the cost of slightly higher latency.
Default: false.
default: false
latex_read:
type: boolean
description: >-
Enable LaTeX formula reading.
- Only supports Chinese. When this parameter is enabled,
`language_boost` will be set to `Chinese`.
- Formulas must be wrapped with `$$`.
- If the request contains a formula with `"\"`, it must be escaped
as `"\\"`.
Example: The quadratic formula
should be written as `$$x = \\frac{-b \\pm \\sqrt{b^2 - 4ac}}{2a}$$`
default: false
T2AAudioSetting:
type: object
properties:
sample_rate:
type: integer
format: int64
description: >-
Specifies the sampling rate of the generated audio. Supported
values: [`8000`, `16000`, `22050`, `24000`, `32000`, `44100`].
bitrate:
type: integer
format: int64
description: >-
Specifies the bitrate of the generated audio. Supported values:
[`32000`, `64000`, `128000`, `256000`].
Note: This parameter only applies to audio in `mp3` format.
format:
type: string
description: >-
Specifies the format of the generated audio. Supported values:
[`mp3`, `pcm`, `flac`, `wav`] .
Note: `wav` is only supported in non-streaming mode.
enum:
- mp3
- pcm
- flac
- wav
default: mp3
channel:
type: integer
format: int64
description: >-
Specifies the number of audio channels. Supported values: [`1`,
`2`].
`1` = mono
`2` = stereo
Default is `1`.
force_cbr:
type: boolean
description: >-
Constant Bitrate (CBR) Control
Set to `true` to enable Constant Bitrate (CBR) for audio encoding.
Note: This parameter only takes effect when output is **streamed**
in **MP3** format.
default: false
PronunciationDict:
type: object
properties:
tone:
type: array
description: >-
Defines pronunciation rules for specific characters or symbols.
For Chinese text, tones are represented numerically: 1 = first tone,
2 = second tone, 3 = third tone, 4 = fourth tone, 5 = neutral tone.
Example: `["omg/oh my god"]`
items:
type: string
TimbreWeights:
type: object
required:
- voice_id
- weight
properties:
voice_id:
type: string
description: >-
The ID of the voice used for synthesis. Must be specified together
with `weight`.
Supports system voices, cloned voices, and text-to-voice generated
voices. The full list of available voices can be viewed on the
[System Voice ID List](/faq/system-voice-id) or retrieved
programmatically using the [Get Voice
API](/api-reference/voice-management-get).
weight:
type: integer
format: int64
description: >-
The weight assigned to each voice. Must be specified together with
`voice_id`.
Supported range: `[1, 100]`. Up to 4 voices can be mixed. A higher
weight value increases similarity to the corresponding voice.
- Parameter Configuration Example:
```json dark
"timbre_weights": [
{
"voice_id": "female-chengshu",
"weight": 30
},
{
"voice_id": "female-tianmei",
"weight": 70
}
]
```
minimum: 1
maximum: 100
example:
voice_id: female-chengshu
weight: 30
VoiceModify:
type: object
description: |-
Voice effects configuration.
Supported audio formats:
- Non-streaming: `mp3`, `wav`, `flac`
- Streaming: `mp3`
properties:
pitch:
type: integer
description: >-
Corresponds to the "Deepen/Brighten" slider on the official page.
Range: `[-100, 100]`. Values closer to -100 produce a deeper voice,
while values closer to 100 result in a brighter tone.
minimum: -100
maximum: 100
intensity:
type: integer
description: >-
Corresponds to the "Stronger/Softer" slider on the official page.
Range: `[-100, 100]`. Values closer to -100 create a stronger, more
forceful sound, while values closer to 100 yield a softer tone.
minimum: -100
maximum: 100
timbre:
type: integer
description: >-
Corresponds to the "Nasal/Crisp" slider on the official page. Range:
`[-100, 100]`. Values closer to -100 produce a fuller, richer sound,
while values closer to 100 generate a crisper tone.
minimum: -100
maximum: 100
sound_effects:
type: string
description: >-
Sound effects. Only one can be applied at a time. Options:
`spacious_echo`, `auditorium_echo`, `lofi_telephone`, `robotic`
enum:
- spacious_echo
- auditorium_echo
- lofi_telephone
- robotic
securitySchemes:
bearerAuth:
type: http
scheme: bearer
bearerFormat: JWT
description: >-
`HTTP: Bearer Auth`
- Security Scheme Type: http
- HTTP Authorization Scheme: `Bearer API_key`, can be found in [Account
Management>API
Keys](https://platform.minimax.io/user-center/basic-information/interface-key).
````