falText to speechComing soon

fal-ai/chatterbox/text-to-speech/multilingual

Name: fal-ai/chatterbox/text-to-speech/multilingual
Brand: fal

fal-ai/chatterbox/text-to-speech/multilingual is a text to speech tool from fal that runs in the background and returns audio. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Priced by usage

Pricing

$0.0325 per 1,000 characters of text. The final charge comes from usage.

Limits

Runs: In the background
Returns: audio
Longest queue wait: 3600s
Run deadline: 1800s
Largest inline input: 1024 KB
Largest input file: 500 MB
Largest output: 4768 MB
Outputs per run: 16

Input

Field	Kind	Default	Description
`text` required	text	—	The text to be converted to speech (maximum 300 characters). Supports 23 languages including English, French, German, Spanish, Italian, Portuguese, Hindi, Arabic, Chinese, Japanese, Korean, and more.
`voice`	text	english	Language code for synthesis. In case using custom please provide audio url and select custom_audio_language.
`custom_audio_language`	one of english, arabic, danish, german, greek, spanish, finnish, french, hebrew, hindi, italian, japanese, korean, malay, dutch, norwegian, polish, portuguese, russian, swedish, swahili, turkish, chinese	—	If using a custom audio URL, specify the language of the audio here. Ignored if voice is not a custom url.
`exaggeration`	number 0.25 to 2	0.5	Controls speech expressiveness and emotional intensity (0.25-2.0). 0.5 is neutral, higher values increase expressiveness. Extreme values may be unstable.
`temperature`	number 0.05 to 2	0.8	Controls randomness and variation in generation (0.05-2.0). Higher values create more varied speech patterns.
`cfg_scale`	number 0 to 1	0.5	Configuration/pace weight controlling generation guidance (0.0-1.0). Use 0.0 for language transfer to mitigate accent inheritance.
`seed`	number (whole)	—	Random seed for reproducible results. Set to 0 for random generation, or provide a specific number for consistent outputs.

Same request in code

curl https://api.spiral.ai/v1/runs \
  -H "Authorization: Bearer $SPIRAL_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "provider": "fal",
    "model": "fal-ai/chatterbox/text-to-speech/multilingual",
    "input": {
      "text": "Last month, we reached a new milestone with two billion views on our YouTube channel."
    }
  }'