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Sarvam AI provides streaming text-to-speech using the Bulbul model, with configurable speaker, pace, and language support for Indian languages.
Vision Agents uses Stream Video for real-time WebRTC transport by default. External WebRTC transports are supported as well. Most AI providers offer free tiers to get started.
Get your Sarvam API key from the Sarvam dashboard.
Sarvam also provides speech-to-text and an LLM. You can use all three in the same agent.

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Installation

uv add "vision-agents[sarvam]"

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Quick start

from vision_agents.core import Agent, User
from vision_agents.plugins import sarvam, getstream, smart_turn

agent = Agent(
    edge=getstream.Edge(),
    agent_user=User(name="Sarvam Agent", id="agent"),
    instructions="Reply in the same language the user speaks.",
    llm=sarvam.LLM(model="sarvam-m"),
    stt=sarvam.STT(language="hi-IN"),
    tts=sarvam.TTS(speaker="shubh"),
    turn_detection=smart_turn.TurnDetection(),
)
Set SARVAM_API_KEY in your environment or pass api_key directly.

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Parameters

tts = sarvam.TTS(
    model="bulbul:v3",
    language="hi-IN",
    speaker="shubh",
    pace=1.0,
)
NameTypeDefaultDescription
modelstr"bulbul:v3"TTS model (bulbul:v2, bulbul:v3-beta, or bulbul:v3)
languagestr"hi-IN"Target language code (e.g. hi-IN, en-IN)
speakerstr"shubh"Speaker voice id — must be compatible with the chosen model (see below)
sample_rateint24000Output sample rate in Hz
pacefloatNoneSpeech pace (bulbul:v3 supports 0.5–2.0)
pitchfloatNoneSpeech pitch (bulbul:v2 only)
loudnessfloatNoneSpeech loudness (bulbul:v2 only)
temperaturefloatNoneSampling temperature (bulbul:v3 and bulbul:v3-beta only)
enable_preprocessingboolTrueNormalize mixed-language and numeric text
api_keystrNoneAPI key (defaults to SARVAM_API_KEY env var)

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Speaker compatibility

Each model supports a specific set of speakers. Passing an incompatible speaker raises a ValueError.
ModelSpeakers
bulbul:v2abhilash, anushka, arya, hitesh, karun, manisha, vidya
bulbul:v3-betaaayan, aditya, advait, amelia, amit, ashutosh, dev, ishita, kabir, kavya, manan, neha, pooja, priya, rahul, ratan, ritu, rohan, roopa, shubh, shreya, simran, sophia, sumit, varun
bulbul:v3aayan, aditya, advait, amelia, amit, ashutosh, dev, ishita, kabir, kavya, manan, neha, pooja, priya, rahul, ratan, ritu, rohan, roopa, shubh, shreya, simran, sophia, sumit, varun

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Next steps

Sarvam STT

Streaming speech-to-text for Indian languages

Sarvam LLM

Chat completions with Sarvam models