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English RP male voice William for Windows MS SAPI5.

CereProc's SAPI voices are compatible with Microsoft SAPI 5 and are supported on Windows XP, Windows Vista and Windows 7 (32bit and 64bit). They appear in the Windows Text-to-Speech Control Panel. All voices are 22khz for excellent clarity and naturalness.

Download size and disk space usage are around 100MB-150MB.

We recommend using our SAPI voices on systems with at least a 1GHz processor and 256MB RAM.