Text-to-speech API
Give your app a voice worth listening to.
One API call turns text into natural narration — and turns audio back into text. Pay in simple credits, cache the audio forever, and never rebuild a speech pipeline again.
100,000 characters free — about 2 hours of narration. No card required.
curl https://audio.chanovalabs.com/v1/speech \
-H "Authorization: Bearer $CHANOVA_AUDIO_KEY" \
-H "Content-Type: application/json" \
-d '{
"tok-key">"text": "The lighthouse had always been there, tall and white.",
"tok-key">"voice": "af_heart"
}'That's the whole integration.
Narration, not robot speech
A voice people will actually listen to for hours — built for audiobooks, courses and long-form reading, not notification blips.
Rendered once, yours forever
Every result is stored and returned as a plain audio URL. Play it a million times; you're never charged again for the same words.
Speech in, as well as out
The same key transcribes audio back to text with word-level timings — enough to build captions. Send a file, a URL, or a video; ffmpeg reads it all.
Never blocks your app
Short text comes back in the same request. Long text returns a job you poll, with parts appearing as they finish so playback can start early.
Free repeats, honestly
Identical text in the same voice is served from cache and costs zero credits — even if someone else rendered it first.
Voices
Press play to hear each one — samples are pre-recorded, so they start instantly. Every voice is available on every plan.
Heartdefault
Warm, natural female (US) — the house voice
Bella
Expressive female (US)
Nicole
Soft, close-mic female (US)
Emma
Female (UK)
Fenrir
Male (US)
One credit per character
No per-minute maths, no seat fees, no surprise overage. You spend a credit for each character you turn into speech — and nothing at all when the same text is requested again.
100,000 free credits
on sign-up — roughly two hours of finished narration
- All voices, no restrictions
- Cached repeats are always free
- Audio URLs you can host or download
- Unlimited API keys per account
Need more? Credit packs from $5 — nothing expires.