{"slug": "soniox-tts-now-available-for-telnyx-voice-ai", "title": "Soniox TTS Now Available for Telnyx Voice AI", "summary": "Telnyx added Soniox text-to-speech to its Voice AI catalog, offering about 200 voices that each speak 60 languages from a single model. Developers address the voices as `Soniox.tts-rt-v2.<Name>` — including `Soniox.tts-rt-v2.Adrian`, `Soniox.tts-rt-v2.Emma`, and `Soniox.tts-rt-v2.Nina` — and can set `language` to a two-letter ISO 639-1 code with `en` as the default. The voices work over `POST /v2/text-to-speech/speech`, WebSocket streaming, Call Control `speak`, `gather_using_speak`, and conference `<Say>`, with `pcm_mulaw` and `pcm_alaw` output, `speed` from `0.7` to `1.3`, and a `reduce_silence` option.", "body_md": "[Contact us](https://telnyx.com/contact-us)\n\n[Log in](https://portal.telnyx.com)\n\nSoniox text-to-speech is now available for Telnyx Voice AI, adding about 200 voices that each speak 60 languages from one model to the voice provider catalog.\n\n`Soniox.tts-rt-v2.<Name>` format, with about 200 voices in the catalog including `Soniox.tts-rt-v2.Adrian`, `Soniox.tts-rt-v2.Emma`, and `Soniox.tts-rt-v2.Nina`.` language` to the two-letter ISO 639-1 code of the text, with `en` as the default. On Voice AI Assistants, one voice follows the caller when they change language during a call.`pcm_mulaw` and `pcm_alaw` output.`POST /v2/text-to-speech/speech` and WebSocket streaming), Call Control `speak`, `gather_using_speak`, and conference `<Say>`.` speed` from `0.7` to `1.3`, and set `reduce_silence` to shorten the pauses between words.\nFor API-based call flows, pass a Soniox voice to `POST /v2/text-to-speech/speech`, over WebSocket streaming, or in a Call Control or TeXML call. Set `language` to the language of the text. Soniox lists the full set of [supported languages](https://soniox.com/docs/tts/concepts/supported-languages). Example REST request:\n\n```\n{\n  \"text\": \"Your verification code is 4729. We sent it to [email protected].\",\n  \"voice\": \"Soniox.tts-rt-v2.Adrian\",\n  \"voice_settings\": {\n    \"language\": \"en\"\n  }\n}\n```\n\nIn TeXML, set the voice and language on `<Say>`:\n\n```\n<Response>\n  <Say voice=\"Soniox.tts-rt-v2.Emma\" language=\"it\">Buongiorno, come posso aiutarla?</Say>\n</Response>\n```\n\n**Learn more** in the [Soniox provider docs](https://developers.telnyx.com/docs/voice/tts/providers/soniox), the [Available Voices catalog](https://developers.telnyx.com/docs/voice/tts/available-voices), or the [Telnyx Text-to-Speech overview](https://developers.telnyx.com/docs/voice/programmable-voice/tts).", "url": "https://wpnews.pro/news/soniox-tts-now-available-for-telnyx-voice-ai", "canonical_source": "https://telnyx.com/release-notes/soniox-tts-voice-ai", "published_at": "2026-09-25 00:00:00+00:00", "updated_at": "2026-09-25 16:58:58.171698+00:00", "lang": "en", "topics": ["ai-products", "natural-language-processing", "developer-tools"], "entities": ["Telnyx", "Soniox", "Soniox.tts-rt-v2.Adrian", "Soniox.tts-rt-v2.Emma", "Soniox.tts-rt-v2.Nina", "Telnyx Voice AI"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/soniox-tts-now-available-for-telnyx-voice-ai", "markdown": "https://wpnews.pro/news/soniox-tts-now-available-for-telnyx-voice-ai.md", "text": "https://wpnews.pro/news/soniox-tts-now-available-for-telnyx-voice-ai.txt", "jsonld": "https://wpnews.pro/news/soniox-tts-now-available-for-telnyx-voice-ai.jsonld"}}