Speech empower your Windows application with a pleasant voice

Add Text to speech capability to your application with Acapela TTS for Windows. Our text to speech engine has been designed to allow developers to integrate text to speech functionalities into their Windows Application. It is compatible with Windows 7, 8 &10. 

Developer benefits

Acapela TTS for Windows is available in over 30 languages and more than 120 voices. It is provided with different API (SAPI/System. Speech. Synthesizer .NET Framework/Proprietary APIs).
Different programming languages are supported (C, C++, C#, VB, VB.NET and Delphi).

Market apps and services

For voice assistants,  ATM vocal assistants, e-learning, Augmentative and Alternative Communication (AAC), speech generating devices (SGD), audio description, subtitling, dubbing, voice overs, education, e-books, dyslexia, learning disabilities, K-12, screen readers, reading machines, etc.

Key benefits

Voice AI

Based on Acapela’s neural TTS, the neural voices generated by AI are highly realistic. They enhance user engagement and the overall user experience.

Expressive voices

Acapela standard portfolio features a wide palette of voice personas. Expressive voices with moods (happy, sad), specific recordings, voice smileys and tags.

Children’s voices

A unique portfolio of genuine children’s voices made by and for children so they can use a voice that sounds their age.

Compliant with my-own-voice

The digital voice created with my-own-voice as a voice replacement solution can be used with Acapela TTS for Windows.

Technical specifications

  • Text Input
    • ASCII 8 bits encodings.
    • Unicode 16 and UTF-8.
    • Support of tagged texts.
  • Lexicons
    • Lexicon Editor for building and editing user lexicons.
  • Synchronization support
    • Lip sync (visemes information).
    • Word synchronization.
    • Bookmarks.
  • Voice Output Tuning Capabilities
    • Speech rate.
    • Volume.
    • Reading modes (sentence, word, spelling).
    • Equalizer.
    • Pause length.
    • Alternative pronunciations.
  • Audio format
    • PCM audio.
    • 16 bits linear.
    • 22 kHz.
  • APIs
    • SAPI 5.1 / 5.3/5.4.
    • System. Speech. Synthesizer .NET Framework.
    • Proprietary APIs (BabTTS API, BabTTS.Net assembly).
  • Development languages
    • C
    • C++
    • C#
    • VB
    • VB.NET
    • and Delphi (Java through JNI).
  • Documentation
    Complete documentation, sample code.
  • Please contact us for more information.

Pricing info

The Acapela TTS for Windows consists of two parts:

  • The software Development Kit is a developer license (with libraries, sample code) and a support and maintenance service. You pay a yearly fee.
  • The Commercial Licence: When a product/application/service has been developed incorporating our software, a royalties-bearing agreement will be worked out. The level of royalties will depend on the number of units, on the voices and on the languages used.


Whatever you might be looking for as a professional, Acapela helps you find the right TTS engine that meets all of your needs.

Need more information for your voice project?
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