Voice analysis is a complex practice and cannot be done without the aid of a specialized software. This is an application that enables you to perform speech synthesis, manipulation and analysis. It features a plain and simple interface which focuses more on getting the job done than on design. The application enables you to view and edit selected objects, play, modify, query, perform spectral, pitch, formant and intensity analysis, combine, analyze periodicity and spectrum, and perform articulatory and Klatt acoustic analysis.
The manipulation tool enables you to filter the sound, and change speech and duration contours. You can also perform various statistic analysis such as Principal Component Analysis, multidimensional scaling and discriminant analysis. The application enables you to save a loaded audio file into AIFF, WAV or FLAC format.
Overall, if you are looking for a tool you can employ in performing voice analysis, this is definitely the application for you.
Praat is licensed as freeware for PC or laptop with Windows 32 bit and 64 bit operating system. It is in other audio tools category and is available to all software users as a free download.