The Microsoft® Speech SDK 5.1 is the developer kit for the Microsoft® Windows environment. Tools, information, and sample engines and applications are provided to help you integrate and optimize your speech recognition and speech synthesis engines with the new Microsoft Speech API 5 (SAPI 5). The Speech SDK also includes updated releases of the Microsoft advanced speech recognition engine and Microsoft concatenated speech synthesis engine.-The Microsoft®　Speech SDK 5.1 is the developer kit for the Microsoft®　Windows environment. Tools, information, and sample engines and applications are provided to help you integrate and optimize your speech recognition and speech synthesis engines with the new Microsoft Speech API 5 (SAPI 5). The Speech SDK also includes updated releases of the Microsoft advanced speech recognition engine and Microsoft concatenated speech synthesis engine.