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Monday, September 4, 2017 2:21:14 PM

Natural Voice SAPI Adapter (Bringing Natural Voices to Your Applications)

Last updated on Saturday, June 15, 2024 - 20:50 by AbdullahZubair
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Natural Voice SAPI Adapter is a useful SAPI 5 text-to-speech (TTS) engine designed to use the natural and neural voices offered by the Azure AI Speech Service. This engine provides easy integration of high-quality, natural-sounding voices into any SAPI 5-compatible application, enhancing the auditory experience for users across various platforms.


  • Versatile Voice Integration: Installable natural voices for the Windows 11 Narrator, Microsoft Edge’s Read Aloud feature, and Azure AI Speech Service with a proper subscription key.
  • Broad Compatibility: Any program supporting SAPI 5 voices can use these natural voices through this TTS engine.
  • Extensive System Support: Compatible with Windows XP SP3 and later versions, including both x86 32-bit and 64-bit systems.
  • Custom Installation Options: Choose between using Narrator voices, Microsoft Edge Read Aloud voices, or both, and tailor the installation to include only preferred languages to avoid clutter.
  • Testing Tools Included: Use the TtsApplication.exe for testing the engine, available in both x86 and x64 folders. Access phoneme and viseme event details with added Chinese translation in the testing application.

System Requirements:

Operating Systems:

Limitations on Older Systems: Windows XP does not support Windows 11 Narrator voices, but can utilize online Microsoft Edge voices and Azure voices.

Future Compatibility: As the engine uses encryption keys from system files, future Windows updates may affect its functionality.

Installation Guide:

Administrator Permission: Ensure you have administrator rights to complete the installation.

  1. Download the zip file from the Download section and extract it into a folder.
  2. Execute Installer.exe and follow the prompts to install both 32-bit and 64-bit versions if needed.
  3. Choose whether to install Narrator voices and/or Microsoft Edge Read Aloud voices.

Natural Voice SAPI Adapter is a powerful solution for using Azure’s natural TTS voices in any SAPI 5-compatible application. With support for various voice options and broad system compatibility, it provides natural speech synthesis and enhances the user experience with Natural Voice SAPI Adapter.

For detailed technical information and to get started, visit the Natural Voice SAPI Adapter GitHub repository.