Glossary
Text-to-speech
Text-to-speech (TTS) is technology that reads text aloud in a human-like voice. In a contact center it lets IVR menus and AI voice agents say any phrase, including a specific customer's amount, date, or order number, without recording every line with a voice-over artist.
Why it mattersIVR and AI agent phrases change in minutes, with no voice-over recording.
Also called: TTS, speech synthesis, voice synthesis
How it works
How it works
A neural network turns text into sound in the chosen voice and places stress, intonation, and pauses automatically. If the system reads something wrong, SSML markup helps: it sets speed, pauses, and how to read numbers, dates, and names.
- On-the-fly synthesis – for a live conversation with an AI agent
- Pre-generated phrases – for a menu that rarely changes
- SSML markup – to fix pronunciation and pauses
Use
Where it is used
- IVR menus and announcements that change often
- AI voice agents and outbound reminders
- Reading out customer data: amounts, dates, and order numbers
- Announcements in several languages
Practice
What to check
- How the voice sounds in English on your real phrases, not demo ones
- How it reads numbers, addresses, and your product names
- How long it takes until the first sound: in a live conversation a long pause is noticeable
- Terms of use for the voice and where synthesis runs – in the cloud or on your own servers
In CONTACT.WORK
How it works in CONTACT.WORK
Text-to-speech gives voice to the IVR menu and to the AI voice agent's answers, which the agent builds from the knowledge base and CRM data. If a menu changes often, it is easier to synthesize its phrases than to record them every time. With synthesis, the IVR can say any data from your business systems – order status, balance, appointment date – without pre-recorded phrases.
Synthesis runs in the CONTACT.WORK cloud or on your own servers. The platform itself is free. Text-to-speech is paid separately, or the model runs on your own hardware. The server calculator shows which server you need to run speech synthesis yourself.
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Where to use it
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Glossary