Deliver 24/7 real-time vocal information to your customers

Acapela TTS for Mac OS X has been designed to speech enable any Mac OS X based application with Acapela’s wide portfolio of languages and voices.

Developer benefits

Several APIs and programming languages are available to simplify the integration process, one common API with Acapela TTS for Windows allowing dual platform development.

Market apps and services

For Accessibility applications, reading tools, K-12, language learning, language translation, Universal Design Literacy tools (UDL), learning and physical disabilities, professional video or audio generation, and much more.

Key benefits

Voices based on 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.

Mac compatibility

Universal binary: Intel 32 and 64 bits – Mac OS X 10.9 “Mavericks” compatible.


Easy integration into your installation and redistribution package, Mac App Store friendly.

Talking interface

Breathe life into your interface and content, improve accessibility of your product to people with difficulties reading or seeing text, give your users an eye-free experience.

Technical Specifications

  • Supported OS
    Mac OS X 10.9 or higher.
  • Text Input
    Mac Roman, Windows ASCII encodings, UTF8. Support of tagged texts.
  • Lexicons
    Lexicon Editor for creating and editing user lexicons.
  • Synchronization support
    Lip sync (visemes), word synchronization, and bookmarks.
  • Voice properties
    Speech rate, volume, reading modes (sentence, word, spelling), equaliser, pause length, and pitch.
  • Audio format
    PCM audio, 16 bits linear, 22 kHz., AIFF, WAV.
  • API
    proprietary API (BabTTS API).
  • Development languages
    C, C++, Objective C, Swift 2.X.
  • Supported developer tool
    XCode 5 and higher.
  • Complete documentation
    accessible online once registered, sample code.
  • Please contact us for more information.

Pricing info

The Acapela TTS for Mac OS X offer 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.
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