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AI Voice — Sesame CSM-1B

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Modell:
+ GPT-5, Claude, Gemini
TTS-Engine Selbst-Hosting Apache 2.0
Sesame CSM-1B — Sesame CSM-1B — Apache 2.0. Conversational Speech Model designed for low-latency, real-time voice. 24 kHz output, sounds best with a short reference-audio context turn. Self-hosted on Free.ai for the /voice/realtime/ tool.
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Wat ass Sesame CSM-1B Wéi klingt dat?

Sesame CSM-1B — Apache 2.0. Conversational Speech Model designed for low-latency, real-time voice. 24 kHz output, sounds best with a short reference-audio context turn. Self-hosted on Free.ai for the /voice/realtime/ tool.

Et ass eng vun de bekanntste Figuren an der Geschicht vum Film, an dat och wéinst senger Roll als "The Cannonball".

Wann ze benotzen Sesame CSM-1B

Audiobooks

Long-form narration with consistent tone. Paste a chapter at a time, download as WAV or MP3, and stitch externally.

Websäit vum Podcast

Kuerz Eröffnungsbumper an Ad-Reads. Passt d'Geschwindegkeet fir Energie un, Format-Switch op MP3 fir kleng Dateien.

Voicemail

Telefonssystem-Prompts. Studio-Qualité-Ausgab ouni Reservéierung, Opnam oder NDAs mat Stëmmtalent.

Zougänglechkeet

Audio neben geschriwen Inhalt fir schwaach gesinn an dyslexisch Lieser. Drop-in op all Säit.

Beispiller vu Phrasen

"Welcome to the show, today we are exploring the future of AI."
"Your package has arrived. Please retrieve it from the front desk."
"Once upon a time, in a quiet village far away, lived a curious child."
"Press one for sales, two for support, or stay on the line for an agent."
"Breaking news: scientists have discovered a new species of deep-sea fish."
"Thank you for choosing us. We appreciate your business and look forward to serving you again."

Präis

D'Generatioun zielt zuerst aus Ärem alldeegleche gratis Pool; wann dee verbraucht ass, fänken d'bezuelte Token-Pakete bei $5 → 200.000 Token un. Ongeféier ~5 Token pro Zeichen, mindestens 100 pro Clip.

Lëscht vu Modellen → · D'Lëscht vun de lëtzebuergesche Sproochen → · 2 Säiten 2 Säiten →

Erweitert Optiounen
Resultat
Den Haaptuert ass La Bassée. Get More Tokens
Want better results? Präis (GPT-5, Claude, Gemini) deliver higher quality. View Plans

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D'Asteroiden 1634 (1634) A. A. an 1635 (1635) A. A. sinn nom A. A. A. benannt, dem franséische Mathematiker.

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Sesame CSM-1B — Apache 2.0. Conversational Speech Model designed for low-latency, real-time voice. 24 kHz output, sounds best with a short reference-audio …

Wéi ze benotzen AI Voice — Sesame CSM-1B

1
Gitt Är Input an

Text aginn, eng Datei erofladen oder beschreiwen wat Dir wëllt. Keng Kont néideg.

2
Klick erzeugen

D'Aarbechtszäiten an d'Aarbechtskonditiounen sinn an der Regel am beschten an der éischter Woch.

3
Download & share

Är Resultater erofzelueden, kopiéieren oder deelen. Gratis fir perséinlech a kommerziell Notzung.

Dësen Tool iwwer API benotzen

Automatiséieren dëse Tool vun Ärem eegene Code. OpenAI-kompatibel REST Endpoint, Bearer-Token Auth, keng extra SDK erfuerderlech. Token Käschte passen d'Web-Interface.

Dokumentatioun API Schlëssel 
curl -X POST https://api.free.ai/v1/tts/ \
  -H "Authorization: Bearer sk-free-..." \
  -H "Content-Type: application/json" \
  -d '{"text": "Hello from Free.ai", "voice": "af_heart", "model": "kokoro"}'

Websäit vun der Gemeng

Sprooche-Klonen
Stëmmwiessel
KI Sproocher
Däitsche Biergerkrich
KI Voice Chat
Stëmmopname
Sprooch aus Text
Stëmmgenerator

AI Voice — Sesame CSM-1B — FAQ

Sesame CSM-1B supports a wide range of languages. The exact list depends on the engine; the form on this page accepts any text and the engine will render in its supported languages. See /voice/ for the full multi-engine picker if you need a specific language.

Most engines render neutral-American English by default and a region-appropriate accent for non-English languages. Premium engines may expose accent variants — paste a sample to compare.

SSML support varies by engine. Pause, prosody, and emphasis tags are honored on most premium engines and on a few self-hosted ones. Plain text always works — no markup required.

Streaming TTS is available on premium engines via the /v1/tts/ API endpoint with stream=true. The web UI on this page returns the full clip once rendering finishes.

Sesame CSM-1B runs on our own GPUs. Generation draws from your daily free pool first. Once depleted, paid tokens start at $5 → 200,000 tokens. Roughly ~5 tokens per character, minimum 100 per clip.

Up to 5,000 characters per request on the web UI. For longer pieces (audiobooks, full chapters), use /voice/audiobook/ which chunks and stitches automatically, or call the API in a loop.

Yes — POST a list of strings to /v1/tts/batch/, or use the workspace UI at /workspace/ to chain TTS into a longer pipeline (e.g., translate → speak → stitch).

Yes — POST text to /v1/tts/ with model="Sesame CSM-1B" (or the slug on this page). Returns WAV or MP3. See /api/ for full reference + SDK snippets.

This page is text-to-speech, not voice cloning — the voice is the engine's default. For voice cloning (uploading a reference audio), see /voice/clone/, which requires you to either own the voice rights or have explicit written consent.

Self-hosted engines run on Free.ai-owned GPUs; nothing leaves our servers. Premium engines pass text to upstream model providers under our DPA. We do not train on your inputs and do not sell data.

Yes — Free.ai grants commercial use of generated audio. The engine's underlying license (Apache 2.0, MIT, or vendor terms) is shown above and on the model reference page; in practice this means voiceovers, ads, podcasts, and apps are all in-scope.

Yes — failed jobs auto-refund to the source (daily pool or paid tokens). If a refund does not show up the same day, email contact@free.ai.

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