> ## Documentation Index > The index for all IBM Cloud docs is at: https://cloud.ibm.com/docs/llms.txt > Use these files to discover more information as needed. # IBM Watson Text to Speech service Use the IBM Watson Text to Speech service to synthesize written text to natural-sounding speech. The synthesized audio uses appropriate cadence and intonation for its language and dialect. The documentation describes the Text to Speech service for IBM Cloud, IBM Cloud Pak for Data, and IBM Cloud Pak for Data as a Service. ## Get started - [Getting started with Text to Speech](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-gettingStarted&format=markdown) - [About Text to Speech](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-about&format=markdown) - [Service features](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-service-features&format=markdown) - [Data security](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-data-security&format=markdown) - Installing - [Installation overview](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-speech-install-data&format=markdown) - [Known issues](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-known-limitations&format=markdown) - Release notes - [Release notes for IBM Cloud](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-release-notes&format=markdown) - [Release notes for IBM Cloud Pak for Data](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-release-notes-data&format=markdown) - [Release notes for IBM Software Hub](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-release-notes-hub&format=markdown) - [Demo](https://www.ibm.com/products) - Additional resources - [Pricing](https://www.ibm.com/products/text-to-speech) - [Blogs](https://developer.ibm.com/blogs/) - [Webinars](https://www.ibm.com/watson) ## How to - Using languages and voices - [Languages and voices](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-voices&format=markdown) - [Using a voice for speech synthesis](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-voices-use&format=markdown) - [Listing information about voices](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-voices-list&format=markdown) - [Using audio formats](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-audio-formats&format=markdown) - Synthesizing speech with the service - [The HTTP interface](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-usingHTTP&format=markdown) - [The WebSocket interface](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-usingWebSocket&format=markdown) - [Modifying speech synthesis characteristics](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-synthesis-params&format=markdown) - Modifying speech synthesis with expressive neural voices - [How to modify speech synthesis](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-synthesis-expressive&format=markdown) - [English expressive voices](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-expressive-english&format=markdown) - [Spanish expressive voices](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-expressive-spanish&format=markdown) - [Portuguese expressive voices](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-expressive-portuguese&format=markdown) - [Generating word timings](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-timing&format=markdown) - Customizing the service - [Understanding customization](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-customIntro&format=markdown) - [Rules for creating custom entries](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-rules&format=markdown) - [Creating and managing custom models](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-customModels&format=markdown) - [Creating and managing custom entries](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-customWords&format=markdown) - [Using a custom model for speech synthesis](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-custom-using&format=markdown) - Using SSML - [Understanding SSML](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-ssml&format=markdown) - [SSML elements](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-elements&format=markdown) - Using phonetic symbols - [Understanding phonetic symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-symbols&format=markdown) - [Dutch (Netherlands) symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-nlSymbols-new&format=markdown) - [English (Australian) symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-auSymbols-new&format=markdown) - [English (United Kingdom) symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-gbSymbols&format=markdown) - [English (United States & Canada) symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-usSymbols&format=markdown) - [French (Canadian) symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-caSymbols&format=markdown) - [French (France) symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-frSymbols&format=markdown) - [German symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-deSymbols&format=markdown) - [Italian symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-itSymbols&format=markdown) - [Japanese symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-jaSymbols&format=markdown) - [Korean symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-koSymbols-new&format=markdown) - [Portuguese (Brazilian) symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-ptSymbols&format=markdown) - [Spanish symbols](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-esSymbols&format=markdown) - Obsolete phonetic symbols - [Dutch (Netherlands) symbols (obsolete)](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-nlSymbols&format=markdown) - [English (Australian) symbols (obsolete)](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-auSymbols&format=markdown) - [Korean symbols (obsolete)](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-koSymbols&format=markdown) - IBM Cloud security - [Information security](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-information-security&format=markdown) - [Activity Tracking events for Text to Speech](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-at_events&format=markdown) - [Public and private network endpoints](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-public-private-endpoints&format=markdown) - [Virtual Private Endpoints](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-virtual-private-endpoints&format=markdown) - Service background - [The science behind the service](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-science&format=markdown) ## Reference - [API & SDK reference](https://{DomainName}/apidocs/text-to-speech) - [High availability and disaster recovery](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-ha-dr&format=markdown) - [Watson SDKs](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-using-sdks&format=markdown) - [Watson GitHub repos](https://github.com/watson-developer-cloud/) ## Help - [Usage FAQs](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-faq-usage&format=markdown) - Developer community - [StackOverflow](https://stackoverflow.com/questions/tagged/ibm-watson+text-to-speech) - [Accessibility](https://cloud.ibm.com/docs/text-to-speech?topic=text-to-speech-accessibility-platform&format=markdown)