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GlossaryProductsNew to AI

TTS

Also written: Text-to-Speech, Speech Synthesis, Gemini TTS, Gemini Text-to-Speech, Synthetic voice, Artificial voice, Text-to-speech API, TTS API

Text-to-Speech: Turns written text into spoken audio.

In plain terms

Text-to-Speech, or TTS, is a technology that reads digital text aloud. Think of it like a digital narrator for anything you can type. It's used in everything from virtual assistants to audiobooks.

For example, when you ask a smart speaker a question, TTS is what turns the text answer into spoken words you can hear. Newer systems can even change their tone and emotion to sound more natural.

The expert version

Text-to-Speech (TTS) is the artificial production of human speech. It converts written text into audible speech signals. Modern TTS systems often leverage deep learning models, such as recurrent neural networks (RNNs) or transformer architectures, to generate highly natural-sounding speech. Key considerations include prosody control, voice cloning capabilities, latency, and computational cost.

Why it matters now

Google Gemini is actively developing and releasing new models for text-to-speech (TTS), including Gemini 3.8 Flash and Gemini 2.5 Pro. These updates focus on creating more natural sounding AI voices, improving response times with streaming audio, and offering faster, cheaper options for high-volume applications. The advancements suggest a push towards more sophisticated and accessible voice generation capabilities.

Where it shows up 60 items, newest first
How each company uses it
Google Gemini
Google Gemini is heavily involved in TTS, releasing various models like Gemini 3.8 Flash and Gemini 2.5 Pro, and focusing on features like custom voice narration and streaming audio output.
Microsoft Copilot
Microsoft Copilot utilizes TTS technology, integrating it into its services to provide spoken output for users.
OpenAI ChatGPT
OpenAI's ChatGPT likely incorporates TTS to enable voice interaction or output features within its platform.
xAI Grok
xAI Grok may use TTS technology to provide spoken responses or features within its AI offerings.
Related terms

Speech SynthesisVoice CloningNatural Language ProcessingAI AgentsGenerative AILarge Language Models

Often confused with
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Origin

The concept of converting text to speech has roots in early computing and speech synthesis research dating back to the mid-20th century. Early systems were rule-based, but modern TTS is largely driven by machine learning.

Try this about 5 minutes

Use a virtual assistant like Google Assistant or Siri. Ask it a question and listen to its spoken response. This response is generated using TTS technology. You can also try online TTS tools to convert short sentences into audio.

Try it: Playbook entries that use thisPlaybook →

The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.

Questions people ask

What is the difference between TTS and a voice assistant?
A voice assistant uses TTS to speak its answers, but TTS itself is just the technology that turns text into sound.
Can TTS sound like a real person?
Modern TTS can sound very natural and even convey emotions, thanks to advanced AI models.

First seen on Subvolts Sep 25, 2023. Updated Oct 17, 2026. Written by an AI model from the items above and reviewed against them weekly; report an error.