According to its authors, praat is "doing phonetics by computer".
Through its graphical interface, several speech analysis functionalities
are available: spectrograms, cochleograms, and pitch and formant
extraction.  Articulatory synthesis, as well as synthesis from pitch,
formant, and intensity are also available.  Other features are
segmentation, labelling using the phonetic alphabet, and computation
of statistics.  Praat is configurable and extensible through its own
scripting language and has provisions for communicating with other
programs.

* Make sure you have read the Intro from Praat's Help menu.
* If that does not help, use the Search button in Praat's manual window.
* Or consult the Frequently Asked Questions on the website.

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