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POST
/
v3
/
elevenlabs-tts-flash-v2.5
ElevenLabs Text to Speech Flash V2.5
curl --request POST \
  --url https://api.highwayapi.ai/v3/elevenlabs-tts-flash-v2.5 \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>' \
  --data '
{
  "seed": 123,
  "text": "<string>",
  "stream": true,
  "voice_id": "<string>",
  "next_text": "<string>",
  "language_code": "<string>",
  "output_format": "<string>",
  "previous_text": "<string>",
  "use_pvc_as_ivc": true,
  "voice_settings": {
    "speed": 123,
    "style": 123,
    "stability": 123,
    "similarity_boost": 123,
    "use_speaker_boost": true
  },
  "next_request_ids": [
    {}
  ],
  "previous_request_ids": [
    {}
  ],
  "apply_text_normalization": "<string>",
  "apply_language_text_normalization": true,
  "pronunciation_dictionary_locators": [
    {
      "version_id": "<string>",
      "pronunciation_dictionary_id": "<string>"
    }
  ]
}
'
Convert text to speech using the voice of your choice and return audio.

​
Request Headers

​
Content-Type
string
required
Enum value: application/json
​
Authorization
string
required
Bearer authentication format: Bearer {{API Key}}.

​
Request Body

​
seed
integer
If specified, the system will try to sample deterministically. Repeated requests with the same seed and parameters should return the same result, but full determinism is not guaranteed.Value range: [0, 4294967295]
​
text
string
required
The text to convert to speech.
​
stream
boolean
Whether to enable Stream mode.
​
voice_id
string
required
The voice ID to use.
​
next_text
string
The text after the text in the current request. Used to improve speech continuity when stitching together multiple generations.
​
language_code
string
The language code (ISO 639-1) used for the model and text normalization. If the model does not support this language code, an error will be returned.
​
output_format
string
default:"mp3_44100_128"
The output format of the generated audio. The format is codec_sample_rate_bitrate. A 192 kbps bitrate for MP3 requires a Creator account or above; a 44.1 kHz sample rate for PCM requires a Pro account or above.Optional values: mp3_22050_32, mp3_24000_48, mp3_44100_32, mp3_44100_64, mp3_44100_96, mp3_44100_128, mp3_44100_192, pcm_8000, pcm_16000, pcm_22050, pcm_24000, pcm_32000, pcm_44100, pcm_48000, ulaw_8000, alaw_8000, opus_48000_32, opus_48000_64, opus_48000_96, opus_48000_128, opus_48000_192
​
previous_text
string
The text before the text in the current request. Used to improve speech continuity when stitching together multiple generations.
​
use_pvc_as_ivc
boolean
default:false
If true, use the IVC version of the voice instead of the PVC version. This is a temporary workaround for the higher latency of the PVC version.
​
voice_settings
object
​
next_request_ids
array
A list of request_id values for subsequent samples. Used to maintain speech continuity when regenerating samples. Up to 3 request_id values can be provided.Array length: 0 - 3
​
previous_request_ids
array
A list of request_id values for samples generated before the current generation. Can be used to improve speech continuity. Up to 3 request_id values can be provided.Array length: 0 - 3
​
apply_text_normalization
string
default:"auto"
Controls text normalization. ‘auto’ lets the system decide, ‘on’ always normalizes, and ‘off’ skips normalization.Optional values: auto, on, off
​
apply_language_text_normalization
boolean
default:false
Controls language-specific text normalization for certain supported languages to achieve more natural pronunciation. Warning: this may significantly increase latency. Currently only Japanese is supported.
​
pronunciation_dictionary_locators
array
A list of pronunciation dictionary locators (id, version_id) to apply to the text. They take effect in order. Each request can include up to 3 locators.Array length: 0 - 3

​
Response Information

Generated audio file Format: binary