SciSpeech

SciSpeech is an innovative and open-source speech analysis, synthesis, and recognition toolbox specifically designed for Scilab, and it delivers unmatched versatility compared to similar tools. This powerful toolset, developed by the Scilab group, is available as freeware under version 1.0.0. The executable file for this latest rendition of SciSpeech is WScilex.exe.

Operating seamlessly on a wide range of operating systems including Windows XP, Vista, 7, 8, 10, and 11, SciSpeech stands out in the Multimedia category, specifically under the Codecs subcategory. Users who have been utilizing version 1.0 will find significant enhancements in the newest version.

Perfect for developers and researchers in the field of speech analysis, SciSpeech offers extensive analysis functionalities. These include time analysis, frequency analysis, censtral analysis, and WRLS-VFF analysis, which deliver superior convenience and capability beyond what you might find in MATLAB's voicebox toolbox.

In terms of speech synthesis, SciSpeech employs the advanced PSOLA algorithm to facilitate prosody adjustments. This feature is open-sourced, allowing seamless application and modification within any speech synthesis system. Furthermore, its speech recognition system is highly efficient, boasting a commendable recognition ratio for telephone numbers and the ability to handle speech commands swiftly.

Notable is the inclusion of open-source versions of "speech command" and "speech dialing" features derived from IBM Viavoice, offering fundamental functions such as system shutdown, restart, logoff, and even opening Scilab help files.

For users interested in a free and comprehensive solution to speech analysis and synthesis, SciSpeech is a prime candidate. The latest version can be easily downloaded from various repositories, ensuring convenient access to all its advanced functionalities.

Pros:

• Open-sourced and free to use
• Extensive speech analysis tools
• Efficient speech recognition system
• Advanced prosody adjustment functionality via PSOLA algorithm
• Versatile compatibility with major Windows OS versions

Cons:

• Exclusive integration with Scilab may limit usability for non-Scilab users
• Advanced features might have a steeper learning curve for beginners

It is not possible to confirm if there is a free download for this software available on the developer's website. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.

You may want to check out more software, such as ValerEQ, RadioCom or AirNav Selcal Decoder, which might be related to SciSpeech.