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Starting a voice conversation with ZeroTwo takes just a few seconds. Click the microphone icon, grant microphone access if prompted, and start speaking — ZeroTwo handles detection, transcription, and response automatically.
The first voice connection in a new browser session may take a few seconds to initialize the WebRTC stream. Subsequent connections in the same session start faster.

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Steps to start a voice chat

1

Open any chat

Navigate to an existing conversation or start a new one at /c. Voice is available in all chat contexts.
2

Click the microphone icon

Find the microphone icon in the prompt bar at the bottom of the chat window. Click it once to activate voice mode.
3

Grant microphone permission

Your browser will show a permission prompt asking for microphone access. Click Allow. This only appears the first time you use voice on zerotwo.ai (or if you previously denied access).If you accidentally clicked Block or previously denied access, see Voice Troubleshooting to reset permissions in your browser settings.
4

Wait for the listening indicator

Once the microphone is live, a pulsing indicator appears near the mic icon. This confirms ZeroTwo is actively listening and ready for your voice input.
5

Speak your message naturally

Talk at a normal pace. Voice Activity Detection (VAD) automatically detects when you start and stop speaking — no button to hold down. When you finish a sentence or pause, ZeroTwo begins processing.
6

ZeroTwo responds with voice and text

After you finish speaking, ZeroTwo processes your message and responds with a voice reply. The response is also displayed as text in the chat, so you always have a written record.
7

Continue the conversation

Speak again to keep the conversation going. Take turns naturally — ZeroTwo listens after it finishes speaking, but you can interrupt it at any time (see below).
8

End the voice session

Click the microphone icon again, or press Escape, to end the voice session and return to standard text mode. The transcript from the session remains in the chat history.

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Interrupting ZeroTwo

You do not need to wait for ZeroTwo to finish speaking. If you want to redirect the conversation, correct something, or ask a follow-up mid-response:
  1. Simply start speaking while ZeroTwo is responding
  2. ZeroTwo stops its current response immediately
  3. Your new message is processed and ZeroTwo replies
This makes voice conversations feel natural rather than rigidly turn-based.

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During a voice chat

Voice mode and text mode are not mutually exclusive. While a voice session is active, you can still:
  • Type a message in the prompt bar and send it — ZeroTwo responds with voice
  • Paste text into the prompt bar — useful for sharing a URL, code snippet, or long passage you don’t want to dictate
  • Attach files using the paperclip icon — ZeroTwo reads and responds to them verbally
This is especially useful when you want to share something that is difficult to dictate (like a URL or block of code) without leaving voice mode.

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Session indicators

IndicatorMeaning
Pulsing mic iconZeroTwo is actively listening for your voice
Solid waveform animationZeroTwo is currently speaking
Static mic iconVoice session is not active

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Transcripts

Everything said during a voice session is saved as text in the chat history:
  • Your spoken messages (what you said, transcribed via Whisper-1)
  • ZeroTwo’s responses (what it said, shown as text)
Transcripts are available immediately after each exchange — you do not need to end the session to see them. Use voice for free-form brainstorming and rely on the transcript afterward without worrying about note-taking.

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Changing your voice mid-conversation

If you want to switch to a different voice during an active session:
  1. End the current voice session (click the mic icon or press Esc)
  2. Go to Settings → Preferences → Voice and select a new voice
  3. Click the mic icon to start a new session — the new voice takes effect immediately
Voice preference changes do not apply mid-session; they take effect when you start the next session.

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Ending a voice session

To stop voice mode at any time:
  • Click the microphone icon in the prompt bar
  • Press Escape on your keyboard
After ending, you return to standard text chat. The full transcript from the voice session remains in the chat history.

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Browser compatibility

Voice chat uses WebRTC, supported in all major modern browsers:
BrowserSupport
ChromeFull support
EdgeFull support
FirefoxFull support
SafariFull support (macOS and iOS)
Voice chat requires an HTTPS connection. All standard zerotwo.ai pages use HTTPS. If you are accessing ZeroTwo over HTTP for any reason, voice will not be available.