CereProc's SAPI voices are compatible with Microsoft SAPI 5 and are supported on Windows 10, Windows 11, Windows 7, Windows 8 and Windows 8.1. They appear in the Windows Text-to-Speech Control Panel. We recommend using our SAPI voices on systems with at least a 1GHz processor and 256MB RAM..

CereProc's Mac voices are supported on Lion, Mountain Lion, Mavericks, Yosemite, El Capitan, Sierra, High Sierra, Mojave and Catalina. They add to the system voices list, found under 'Speech' in 'System Preferences'.

All voices are 48khz for excellent clarity and naturalness. Download size and disk space usage are around 100MB-150MB.

Please note the lower-priced versions of the voices are for personal use only, e.g. a home user on their own PC. Commercial users of CereProc voices, or users wishing to distribute audio to third parties should use Audio Broadcast License versions of the voices. These versions of the voices are licensed for use in commercial organisations and/or for audio redistribution. Commercial organisations are required to purchase a licence for each device. The voices are licensed for use by the individual or organisation making the purchase. A broadcast licence for the voice is included and is required for purposes such as the distribution of generated speech in an application, or for including audio in presentations or sales material that third parties will access. Users are permitted to generate and distribute an unlimited quantity of audio to an unlimited number of end users. Please note that the price is an annual charge. For further information on these versions of the voices, please contact Sales.