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Voice playground

The same four Cartesia capabilities Speek uses in production, wired to this app's own route handlers. Nothing here talks to Cartesia from the browser.

Text to speech
1 credit per character · POST /api/cartesia/tts

99 credits

Warm, unhurried American English. The safe default for support lines.

Controls how dates, times, numbers, and phone numbers are read.

Sonic treats speed, volume, and emotion as natural delivery guidance.