Cepstral Marta 5.2.2 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. Swifttalker.exe is the default file name to indicate the Cepstral Marta installer.
This program is an intellectual property of Cepstral LLC. We recommend checking the downloaded files with any free antivirus. This PC program can be installed on Windows XP/Vista/7/8/10/11 environment, 32-bit version. The most popular versions of the Cepstral Marta 5.1 and 4.2. The program lies within Multimedia Tools, more precisely Editors & Converters.
From the developer:
This program is a high-quality synthetic voice add-on for SwiftTalker. Anywhere there is spoken delivery of information, there's a place for high quality speech synthesis. Using Cepstral Marta, you can make realistic synthetic voices that can say anything, anywhere, with personality and style. You can build high quality, natural sounding voices for hand-held, desktop, and server applications.
You may want to check out more software, such as Cepstral Allison, Cepstral Callie or Cepstral Miguel, which might be related to Cepstral Marta.