Build / Text to speech

Text to Speech In Real Time

Generate low-latency speech from text for previews, live agents, IVR flows, and product experiences.

Low-latency speechScript previewVoice tuning
A professional speaking into a studio microphone while wearing headphones

Realtime TTS

Natural speech tested where pacing, clarity, and responsiveness can be heard.

Inside the speech pipeline

Every millisecond between text and speech has a job.

Fast voice experiences depend on more than synthesis speed. Text handling, delivery controls, and resilient streaming must work as one responsive pipeline.

Streaming engine

Text becomes playable speech in one responsive path.

Input handling, synthesis, and resilient delivery remain synchronized from the first text fragment to the final audio frame.

Speech stream
  1. 01

    System

    Streaming delivery

    Start speaking before the full response is complete

    Stream generated audio in chunks to reduce perceived delay in agents, assistants, IVR flows, and interactive applications.

  2. 02

    System

    Speech control

    Make important words sound right

    Choose an appropriate voice and guide pace, pronunciation, pauses, and delivery for names, numbers, and domain language.

  3. 03

    System

    Developer workflow

    Move from a script preview to a live experience

    Use the same speech layer for prototypes and production, with predictable request handling, observability, and fallback behavior.

From text to playback

A streaming path tuned for natural turn-taking.

Prepare the voice, send text incrementally, begin playback early, and monitor the full path so conversations stay responsive.

Guided setup workflow4 stages to launch
  1. 01
    Stage 01

    Send text

    Provide complete text or stream response tokens from your application.

  2. 02
    Stage 02

    Apply voice settings

    Select the voice, language, format, and delivery controls.

  3. 03
    Stage 03

    Receive audio

    Begin playback as audio chunks arrive instead of waiting for the full file.

  4. 04
    Stage 04

    Observe delivery

    Track timing, errors, usage, and the experience callers receive.

Live speech stream

Live Speech Streaming

Stream speech into the products and channels you already run.

01/ 03

Start speaking before the full response is complete

Stream generated audio in chunks to reduce perceived delay in agents, assistants, IVR flows, and interactive applications.

Included controls

01Incremental audio output
02Conversation-ready playback
03Configurable audio formats
F.A.Q.

What builders ask about realtime synthesis.

What makes realtime TTS different from standard TTS?+

Realtime TTS is designed to return playable audio incrementally, which reduces the wait before speech begins and makes it better suited to live conversations and interactive products.

Can pronunciation be customized?+

Pronunciation can be guided for names, acronyms, numbers, and specialist terms. Important scripts should still be previewed with the selected voice and language before launch.

Which audio format should an application use?+

Choose a format supported by the playback or telephony environment, balancing quality, bandwidth, and transcoding needs. The right choice depends on where the audio will be used.

Can it be used outside phone calls?+

Yes. Realtime speech can power web and mobile assistants, accessibility features, kiosks, games, training tools, and other responsive voice interfaces.

Ready to get started?

Put low-latency speech into one live product experience.

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