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Server Text to Speech (TTS) for Windows or Linux
The AT&T Natural Voices Server Edition SDK is a Software Developers kit based on AT&T's award winning text to speech technology. Believed by many to be the most natural sounding TTS available, this "highly scalable multithreaded" technology can add significant humanistic value and automation to a wide variety of applications and projects. 

  • designed for developers and integrators to add voice to their projects
  • implemented using a developer SDK & distributable runtime software
  • supports dynamic multiuser creation of wavefiles for an extensive range of projects (wavefile usage requires additional licensing)
  • utilizes a flexible "engine + voice font" architecture
  • supports custom pronunciations-acronyms-abbreviations-playback rate
  • proven technology from years of research by voice pioneer AT&T
  • available in Windows or Linux in (8) US English voices and (2) Spanish voices
  • requires Distribution or Usage License

Supported Languages*

Voice Fonts available in
8 &16 KHZ

  1. US English (Mike, Crystal, Claire, Julia, Lauren, Mel, Ray, Rich)

  2. Spanish (Alberto, Rosa)
*SDK includes a trial version of the TTS runtime engine and up to 2 voices for 1 language


  1. Obtain a Server edition  Software Developers Kit (SDK)
    • May be purchased on the website with a 90 day evaluation engine* and downloaded (requires internet connection)
    • Provides a software environment for internal development and testing

  2. Purchase Usage licenses (requires agreement)
    • Any type of usage/deployment/distribution of audio files or TTS runtime software requires licensing
    •  A broad range of licensing models are available for internal use or external distribution
    • Minimum order levels and Volume pricing apply
    • A permanent*  TTS engine is provided at time of purchase of Usage/Distribution licenses
  3. To request information and prices click Inquire or call Sales at 954-678-4155

Server SDK: $350 (package includes)

  • Libraries and documentation in US English for building Windows or Linux server applications
  • SDK includes 90 day trial runtime engine (requires internet connection) for development and testing only, and your choice of one language (additional voice fonts are available for $50 each) A permanent runtime engine is provided when usage licensing is purchased
  • Compatible with SAPI 5.0 and newer - Windows only
  • Supports custom user dictionaries and SSML compatible control tags 
  • API documentation
  • C++ Libraries
  • Visual Basic 6, .NET, C #, ASP and Flash/PHP sample programs using SAPI 5.x  - Windows only
  • Binaries for Simple SAPI (TTS audio creation tool) and Dictionary Editor (create user dictionary) - Windows only
  • Licensed for internal development/testing only


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