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1M-3MSeries AB2BFeature launchDemoUSVertical AI
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4.40
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Cartesia's Multilingual Voices launch lets a single voice speak several languages while keeping the same character, tone, and warmth across every call. The demo, filmed with Baklavastory, a bakery in San Francisco's Mission district, shows a receptionist named Blanca taking orders in English, Hindi, and Mandarin without the personality shifting between callers. It's aimed at teams building phone agents, customer support, and other voice products where consistency across a customer base matters as much as translation accuracy.
The launch fits into Cartesia's Sonic line of realtime text-to-speech models, where a voice can support one or more locales, defined by language and accent , and localization is used to adapt a voice to a new locale while preserving the original speaker's identity. That's the harder problem the tweet gestures at, going beyond swapping in a translated script to making the same voice sound native everywhere it's used.
Cartesia was cofounded by Karan Goel, Arjun Desai, Brandon Yang, and Albert Gu, emerging from Stanford's AI Lab in 2023 , with Goel as CEO and Albert Gu as Chief Scientist . The team's research background is in efficient sequence architectures beyond transformers, which is what underpins the low-latency, realtime nature of the voice stack this feature ships on top of.
Comments (10)
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Priya Kothari26d ago
The Baklavastory framing is so much better than another generic demo of a robot ordering pizza. Actually made me want to visit the shop.
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marcus l.26d ago
Tweet got cut off mid-sentence on the reveal line. Cruel move or A/B test on click-through?
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Dima Petrov26d ago
ok wait, keeping the same voice character across languages is the actually hard part. Most 'multilingual' voice demos sound like the model got a lobotomy the second it switches to Turkish.
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Yuko Amano26d ago
Curious what you're doing for prosody transfer across typologically distant language pairs. Any paper coming or is this staying behind the API?
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Faris Halabi26d ago
Cool cool cool but where are the docs. Give me streaming latency numbers, language codes, and a rate limit table or I can't ship anything by Friday.
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Obi Makinde26d ago
Hot take: the voiceover pacing in the video is doing 40% of the selling here. Whoever edited that deserves a raise.
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Zee Okafor26d ago
First seven seconds of that video are elite, you hear the accent shift before you see any text. That's the hook that makes people unmute.
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Leah Ronstadt26d ago
Genuine question, if the baklava shop only has one human employee, does the AI answer while she's talking to a customer in person? Wondering how handoff works.
K
Kenji Takemura26d ago
One more for the roadmap: let me clone a business owner's voice from a 30 second sample and lock it across every language. That's the actual SMB dream.
A
Anindita Basu26d ago
The pattern of anchoring launches to a real local business is such a good move. Reads way more human than the usual synthetic call center transcript demos.
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Cartesia
#1-ranked realtime interaction models. Built on frontier AI research.
#1-ranked realtime interaction models. Built on frontier AI research.
Tags
TLVC Rating
Community Rating
No ratings yet
to rate this launch.
Cartesia's Multilingual Voices launch lets a single voice speak several languages while keeping the same character, tone, and warmth across every call. The demo, filmed with Baklavastory, a bakery in San Francisco's Mission district, shows a receptionist named Blanca taking orders in English, Hindi, and Mandarin without the personality shifting between callers. It's aimed at teams building phone agents, customer support, and other voice products where consistency across a customer base matters as much as translation accuracy. The launch fits into Cartesia's Sonic line of realtime text-to-speech models, where a voice can support one or more locales, defined by language and accent , and localization is used to adapt a voice to a new locale while preserving the original speaker's identity. That's the harder problem the tweet gestures at, going beyond swapping in a translated script to making the same voice sound native everywhere it's used. Cartesia was cofounded by Karan Goel, Arjun Desai, Brandon Yang, and Albert Gu, emerging from Stanford's AI Lab in 2023 , with Goel as CEO and Albert Gu as Chief Scientist . The team's research background is in efficient sequence architectures beyond transformers, which is what underpins the low-latency, realtime nature of the voice stack this feature ships on top of.
Comments (10)
The Baklavastory framing is so much better than another generic demo of a robot ordering pizza. Actually made me want to visit the shop.
Tweet got cut off mid-sentence on the reveal line. Cruel move or A/B test on click-through?
ok wait, keeping the same voice character across languages is the actually hard part. Most 'multilingual' voice demos sound like the model got a lobotomy the second it switches to Turkish.
Curious what you're doing for prosody transfer across typologically distant language pairs. Any paper coming or is this staying behind the API?
Cool cool cool but where are the docs. Give me streaming latency numbers, language codes, and a rate limit table or I can't ship anything by Friday.
Hot take: the voiceover pacing in the video is doing 40% of the selling here. Whoever edited that deserves a raise.
First seven seconds of that video are elite, you hear the accent shift before you see any text. That's the hook that makes people unmute.
Genuine question, if the baklava shop only has one human employee, does the AI answer while she's talking to a customer in person? Wondering how handoff works.
One more for the roadmap: let me clone a business owner's voice from a 30 second sample and lock it across every language. That's the actual SMB dream.
The pattern of anchoring launches to a real local business is such a good move. Reads way more human than the usual synthetic call center transcript demos.