Link to issue number:

Preparations for #12945

Summary of the issue:

1. The way you can output speech using the nvda controller is pretty limited. It is not possible to control prosody parameters, for example. Also you can't easily insert pauses in speech.
2. Construction of speech sequences can be pretty complex. It would if we'd have some standardized way of providing speech attributes in text.

Description of user facing changes

None for normal users, only developers.

Description of development approach

Documented in changelog entries. Basically:

• Added an SSML Parser to generate speech sequences
• Added speech.speakSsml to generate speech output using SSML.

Support in the NVDA Controller Client will be added in a follow up.

Testing strategy:

Unit tests

Known issues with pull request:

None known

Code Review Checklist:

• Documentation:
  • Change log entry
  • User Documentation
  • Developer / Technical Documentation
  • Context sensitive help for GUI changes
• Testing:
  • Unit tests
  • System (end to end) tests
  • Manual testing
• UX of all users considered:
  • Speech
  • Braille
  • Low Vision
  • Different web browsers
  • Localization in other languages / culture than English
• API is compatible with existing add-ons.
• Security precautions taken.