Inline speech tags
Also written: SSML tags, Speech tags
Commands in text that control speech synthesis, like emphasis, pauses, or pronunciation, for more natural spoken output.
Inline speech tags are like hidden instructions within text that tell a computer how to read it aloud. They can make the synthesized voice sound more natural by controlling things like how loud a word is, if there's a pause, or how a word should be pronounced.
For example, if you wanted the word 'amazing' to sound extra exciting, you could put a tag around it like `<emphasis level="strong">amazing</emphasis>`. The text to speech system would then read that word with more force.
Inline speech tags, often referred to as Speech Synthesis Markup Language (SSML) elements or similar custom tags, are embedded commands within text that modify the output of a text-to-speech (TTS) engine. These tags control prosody (e.g., emphasis, pitch, rate), pauses, pronunciation (e.g., phonemes, aliases), and even voice selection. They allow for fine-grained control over synthesized speech, moving beyond simple concatenation of phonemes to create more expressive and human-like audio.
The implementation varies, but generally, a TTS system parses the input text, identifies these tags, and interprets them as instructions to alter its generation process. Tradeoffs include increased complexity in text preparation and potential compatibility issues between different TTS systems if custom tag sets are used.
Recent advancements in AI, particularly in text-to-speech models, are enabling more natural and expressive voice generation. Companies are integrating these capabilities into APIs, allowing developers to control speech nuances with inline tags for richer user experiences.
- Text to SpeechxAI · xAI Docs: Guides ·
- xAI Grok
- xAI's Grok API converts text to speech, likely supporting inline tags for controlling expressive voices and flexible formats.
- HTML tags
- HTML tags are used to structure web pages and display content, while
- Markdown
- Markdown is a lightweight markup language for creating formatted text,
- Prompt Engineering
- Prompt engineering involves crafting input text for AI model
The concept of embedding control codes within text streams has a long history in computing. For speech synthesis, formal standards like Speech Synthesis Markup Language (SSML) were developed by organizations like the W3C to provide a standardized way to control TTS output. Source ↗
Find a text-to-speech tool or API that supports SSML or custom speech tags. Take a sentence and add a tag to emphasize a word, like making 'very' sound stronger. Listen to the difference in pronunciation compared to the original sentence without the tag.
The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.
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- TemplateReusable workflow templates for healthcare teamsTeams can create and share templates for common workflows like documentation or prior authorizations. · 15 min
- TemplateTemplate for building an AI tool tailored to your workA structured approach to defining and building a custom AI tool for specific business needs. · 15 min
- TemplateEvals CSV prompt list for agent skillsA CSV file template for listing prompts used in evaluating agent skills. · 20 min
Questions people ask
- What is the main benefit of using inline speech tags?
- They allow for much more natural and expressive speech synthesis, giving developers fine-grained control over how text is spoken.
- Are inline speech tags the same as SSML?
- SSML is a standardized markup language for speech synthesis. Inline speech tags can refer to SSML or similar custom commands used by specific TTS systems.
First seen on Subvolts Aug 31, 2026. Updated Sep 15, 2026. Written by an AI model from the items above and reviewed against them weekly; report an error.