How to turn on the AI’s voice replies (text-to-speech)
Turn on Text-to-Speech so the AI can reply on WhatsApp with audio: choose the voice, the quality, and whether it should speak only when the customer sends audio.
1 min readBasicUpdated on November 12, 2026
Where to find it in Cognizy
Video lesson coming soon. For now, follow the steps below.
With Text-to-Speech turned on, the AI’s reply on WhatsApp is also sent as audio, in a voice you choose. In voice mode, the AI only speaks when the customer sends audio; for other messages, it replies in writing.
Where to find it in Cognizy
Before you start
- Lab feature: if Voice and audio doesn’t appear in Settings, turn it on in Settings › Lab, or open it through the link.
- Only company admins can change this setting.
Step by step
- Step 1:
Open . In the Text-to-Speech (TTS) card, turn on Enable TTS.
- Step 2:
Choose the Voice and the Model: Standard (faster) replies faster; HD (higher quality) sounds more natural.
- Step 3:
For the AI to speak only when the customer sends audio, turn on Voice mode: reply to audio with audio. When turned off, it sends audio in every reply.
- Step 4:
Click Save settings.
How to know it worked
The setting is saved, and the AI’s next reply on WhatsApp will already be sent as audio, in the chosen voice (in voice mode, only when the customer sends audio).
If it doesn’t work
The AI keeps replying only in writing.
Check that Enable TTS is turned on and saved. With Voice mode turned on, it only speaks when the customer sends audio.
Audio doesn’t play on the official WhatsApp number.
Check whether Disable audio on the official channel (Cloud) is turned on: when it is, audio is sent only on the unofficial channel.
Next step
Set up a ready-made audio greeting.
Sign in with your Cognizy account to save your progress.
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