> ## Documentation Index > Fetch the complete documentation index at: https://docs.siliconflow.com/llms.txt > Use this file to discover all available pages before exploring further. # 创建文本转语音请求 > Generate audio from input text. The data generated by the interface is the binary data of the audio, which requires the user to handle it themselves. Reference:https://docs.siliconflow.com/capabilities/text-to-speech#5 ## OpenAPI ````yaml post /audio/speech openapi: 3.0.0 info: title: SiliconFlow API description: The SiliconFlow REST API version: 1.0.0 contact: name: SiliconFlow Support url: https://www.siliconflow.com/ license: name: MIT url: https://github.com/siliconflow-inc/siliconflow-api/blob/main/LICENSE servers: - url: https://api.siliconflow.com/v1 security: - bearerAuth: [] paths: /audio/speech: post: tags: - Audio summary: Create Speech description: >- Generate audio from input text. The data generated by the interface is the binary data of the audio, which requires the user to handle it themselves. Reference:https://docs.siliconflow.com/capabilities/text-to-speech#5 operationId: createSpeech requestBody: required: true content: application/json: schema: oneOf: - $ref: '#/components/schemas/fish-speech-1.5' - $ref: '#/components/schemas/CosyVoice2-0.5B' responses: '200': description: >- Generate audio based on the input text. The data generated by the interface is in binary format and requires the user to process it themselves. Reference:https://docs.siliconflow.com/capabilities/text-to-speech#5 headers: Transfer-Encoding: schema: type: string description: chunked content: application/audio: schema: type: string format: binary example: Audio binary data audio/wav: schema: type: string format: binary example: Audio binary data audio/opus: schema: type: string format: binary example: Audio binary data '400': description: BadRequest content: application/json: schema: $ref: '#/components/schemas/BadRquestData' type: object '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/UnauthorizedData' '404': description: NotFound content: application/json: schema: $ref: '#/components/schemas/NotFoundData' '429': description: RateLimit content: application/json: schema: $ref: '#/components/schemas/RateLimitData' '503': description: Overloaded content: application/json: schema: $ref: '#/components/schemas/OverloadedtData' '504': description: Timeout content: application/json: schema: $ref: '#/components/schemas/TimeoutData' components: schemas: fish-speech-1.5: title: fish-speech-1.5 type: object required: - model - input - voice additionalProperties: false properties: model: type: string enum: - fishaudio/fish-speech-1.5 description: >- Corresponding Model Name. To better enhance service quality, we will make periodic changes to the models provided by this service, including but not limited to model on/offlining and adjustments to model service capabilities. We will notify you of such changes through appropriate means such as announcements or message pushes where feasible. input: type: string description: The text to generate audio for. example: The text to generate audio for maxLength: 128000 minLength: 1 voice: type: string enum: - fishaudio/fish-speech-1.5:alex - fishaudio/fish-speech-1.5:anna - fishaudio/fish-speech-1.5:bella - fishaudio/fish-speech-1.5:benjamin - fishaudio/fish-speech-1.5:charles - fishaudio/fish-speech-1.5:claire - fishaudio/fish-speech-1.5:david - fishaudio/fish-speech-1.5:diana response_format: description: >- The format to audio out. Supported formats are `mp3`, `opus`, `wav`, `pcm` default: mp3 type: string enum: - mp3 - opus - wav - pcm sample_rate: description: >- Control the output sample rate. The default values and differ for different video output types, as follows: opus: Supports 48000 Hz. wav, pcm: Supports 8000, 16000, 24000, 32000, 44100 Hz, with a default of 44100 Hz. mp3: Supports 32000, 44100 Hz, with a default of 44100 Hz. type: number example: 32000 enum: - 8000 - 16000 - 24000 - 32000 - 44100 - 48000 stream: description: streaming or not type: boolean default: true speed: type: number description: >- The speed of the generated audio. Select a value from `0.25` to `4.0`. `1.0` is the default. format: float minimum: 0.25 maximum: 4 default: 1 gain: type: number format: float minimum: -10 maximum: 10 default: 0 CosyVoice2-0.5B: title: CosyVoice2-0.5B type: object required: - model - input additionalProperties: false properties: model: type: string enum: - FunAudioLLM/CosyVoice2-0.5B description: >- Corresponding Model Name. To better enhance service quality, we will make periodic changes to the models provided by this service, including but not limited to model on/offlining and adjustments to model service capabilities. We will notify you of such changes through appropriate means such as announcements or message pushes where feasible. input: type: string description: >- For natural language instructions, add a special end marker "<|endofprompt|>" before the natural language description. These descriptions cover aspects such as emotion, speaking speed, role-playing, and dialects. For detailed instructions, insert pitch bursts between text markers, using markers like "[laughter]" and "[breath]." Additionally, we apply pitch feature markers to phrases; for example:Can you say it with a happy emotion? <|endofprompt|> Today is really happy, Spring Festival is coming! I’m so happy, Spring Festival is coming! [laughter] [breath]. example: >- Can you say it with a happy emotion? <|endofprompt|>I'm so happy, Spring Festival is coming! default: >- Can you say it with a happy emotion? <|endofprompt|>I'm so happy, Spring Festival is coming! maxLength: 128000 minLength: 1 voice: type: string enum: - FunAudioLLM/CosyVoice2-0.5B:alex - FunAudioLLM/CosyVoice2-0.5B:anna - FunAudioLLM/CosyVoice2-0.5B:bella - FunAudioLLM/CosyVoice2-0.5B:benjamin - FunAudioLLM/CosyVoice2-0.5B:charles - FunAudioLLM/CosyVoice2-0.5B:claire - FunAudioLLM/CosyVoice2-0.5B:david - FunAudioLLM/CosyVoice2-0.5B:diana references: description: The voice field and references field are mutually exclusive. type: array items: type: object properties: audio: oneOf: - type: string format: uri description: >- A URL pointing to an audio file (e.g., `https://example.com/audio.mp3`). - type: string pattern: ^data:audio\/\w+;base64,[A-Za-z0-9+/=]+$ description: >- A base64-encoded audio string (e.g., `data:audio/mp3;base64,ABC123...`). text: description: >- The audio content, which can be either a URL pointing to an audio file or a base64-encoded audio string. type: string response_format: description: >- The format to audio out. Supported formats are `mp3`, `opus`, `wav`, `pcm` default: mp3 type: string enum: - mp3 - opus - wav - pcm sample_rate: description: >- Control the output sample rate. The default values and differ for different video output types, as follows: opus: Supports 48000 Hz. wav, pcm: Supports 8000, 16000, 24000, 32000, 44100 Hz, with a default of 44100 Hz. mp3: Supports 32000, 44100 Hz, with a default of 44100 Hz. type: number default: 32000 stream: description: streaming or not type: boolean speed: type: number description: >- The speed of the generated audio. Select a value from `0.25` to `4.0`. `1.0` is the default. format: float minimum: 0.25 maximum: 4 default: 1 gain: type: number format: float minimum: -10 maximum: 10 default: 0 BadRquestData: type: object required: - message - data - code properties: code: type: integer nullable: true default: false example: 20012 message: type: string nullable: false data: type: string nullable: false UnauthorizedData: type: string default: false example: Invalid token NotFoundData: type: string default: false example: 404 page not found RateLimitData: type: object required: - message - data properties: message: type: string example: >- Request was rejected due to rate limiting. If you want more, please contact contact@siliconflow.com. Details:TPM limit reached. data: type: string OverloadedtData: type: object required: - code - message - data properties: code: type: integer example: 50505 message: type: string example: Model service overloaded. Please try again later. data: type: string nullable: false TimeoutData: type: string securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: your api key description: >- Use the following format for authentication: Bearer [](https://cloud.siliconflow.com/account/ak) ````