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Praat is a free speech analysis and manipulation software for Windows, macOS and Linux.

Features

Speech synthesis

• From pitch, formant, and intensity
• Articulatory synthesis
• Klatt acoustic synthesis

Speech analysis

• Spectral analysis (spectrograms)
• Pitch analysis
• Formant analysis
• Intensity analysis
• Jitter, shimmer, voice breaks
• Cochleagram
• Excitation pattern

Listening experiments

• Identification and discrimination tests

Labelling and segmentation

• Label intervals and time points on multiple tiers
• Use phonetic alphabet
• Use sound files up to 2 gigabytes (3 hours)

Speech manipulation

• Change pitch and duration contours
• Filtering

Labelling and segmentation

• Label intervals and time points on multiple tiers
• Use phonetic alphabet
• Use sound files up to 2 gigabytes (3 hours)

Learning algorithms

• Feedforward neural networks
• Discrete and stochastic Optimality Theory

Statistics

• Multidimensional scaling
• Principal component analysis
• Discriminant analysis

Graphics

• High quality for your articles and thesis
• Produce Encapsulated PostScript files
• Integrated mathematical and phonetic symbols

Programmability

• Easy programmable scripting language
• Communicate with other programs (the sendpraat source code)
• Create hypertext manuals with sound I/O

Portability

• Machine-independent binary files
• Read and write many sound and other file types

Configurability

• Grow or shrink menus
• Save prefs for fonts, views, sound devicesEnter your zip code here

What’s New

• Sound analysis areas: better visible contrast in intensity curve (green on lime).
• Windows: repaired a bug introduced in 6.3.10 (as a result of the repair mentioned there) by which the Demo window would be insensitive to arrow keys.
• SpeechSynthesizer: repaired a bug that caused Get phonemes from text… to return empty text.
• Repaired a bug that caused Praat to crash when you supplied 0 for the channel number in Sound: Get nearest zero crossing