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Voices

For the complete documentation index, see llms.txt

Pick any voice ID from the tables below and set it on session.output.voice in a session.update before session.ready. session.output is immutable once the session is established, so the voice can't be changed mid-conversation.

{
  "type": "session.update",
  "session": {
    "output": { "voice": "ivy" }
  }
}

Language support

The voice agent's input (speech recognition) and output (speech synthesis) cover different sets of languages:

• Input (understood): 🇺🇸 English, 🇫🇷 French, 🇩🇪 German, 🇮🇹 Italian, 🇵🇹 Portuguese, and 🇪🇸 Spanish.
• Output (spoken): those six, plus 🇮🇳 Hindi, 🇯🇵 Japanese, 🇰🇷 Korean, 🇨🇳 Mandarin, and 🇷🇺 Russian.

The agent can speak a language it can't transcribe from user audio. This is useful for translation-style flows where the user speaks one of the recognized languages and the agent replies in another.

Choose a voice by language

Every voice supports every output language. The difference between the two tables is the voice's primary accent:

• For an English accent (American or British) carried into other languages, pick from Voices.
• For a native accent in a specific non-English language, pick the matching language-specific voice.

Voices

These voices have an American or British English accent. They speak 🇺🇸 English, 🇫🇷 French, 🇩🇪 German, 🇮🇹 Italian, 🇵🇹 Portuguese, 🇪🇸 Spanish, 🇮🇳 Hindi, 🇨🇳 Mandarin, 🇷🇺 Russian, 🇰🇷 Korean, and 🇯🇵 Japanese. Their English accent carries over into the other languages.

Voice	Accent	Description	Sample
ivy	🇺🇸	Professional, deliberate, smooth
james	🇺🇸	Conversational, professional, male
tyler	🇺🇸	Theatrical, energetic, chatty, jagged
winter	🇺🇸	Empathetic, aesthetic, conversational
sam	🇺🇸	Soft, conversational, young
mia	🇺🇸	Smooth, conversational, young
bella	🇺🇸	High-pitched, chatty
david	🇺🇸	Deep, calming, conversational
jack	🇺🇸	Smooth, direct, clear, fast-paced
kyle	🇺🇸	Chatty, nasal, expressive
helen	🇺🇸	Soft, older, calming
martha	🇺🇸	Southern, older, warm
river	🇺🇸	Slow, calming, ASMR
emma	🇺🇸	Lively, young, conversational
victor	🇺🇸	Deep, older
eleanor	🇺🇸	Deeper, older, calming
sophie	🇬🇧	Clear, smooth, instructive, simple
oliver	🇬🇧	Narrative, conversational

Language-specific voices

These voices have a native accent in a specific non-English language. They also speak 🇺🇸 English, 🇫🇷 French, 🇩🇪 German, 🇮🇹 Italian, 🇵🇹 Portuguese, 🇪🇸 Spanish, 🇮🇳 Hindi, 🇨🇳 Mandarin, 🇷🇺 Russian, 🇰🇷 Korean, and 🇯🇵 Japanese, and they code-switch naturally between their primary language and English.

Voice	Native accent	Description	Sample
arjun	🇮🇳 Hindi/Hinglish	Conversational
ethan	🇨🇳 Mandarin	Conversational
dmitri	🇷🇺 Russian	Conversational
lukas	🇩🇪 German	British English accent, conversational, smooth
lena	🇩🇪 German	Conversational, soft
pierre	🇫🇷 French	Conversational
mina	🇰🇷 Korean
ren	🇯🇵 Japanese
mei	🇨🇳 Mandarin
joon	🇰🇷 Korean
giulia	🇮🇹 Italian
luca	🇮🇹 Italian
lucia	🇪🇸 Spanish
hana	🇯🇵 Japanese
mateo	🇪🇸 Spanish
diego	🇨🇴 Spanish (Latin American)	Colombian