According to its authors, Praat Speech Analyser 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.
Praat is configurable and extensible through its own scripting language and has provisions for communicating with other programs.
Key Features
- Segmentation.
- Labelling using the phonetic alphabet.
- Computation of statistics.
- Generate waveforms.
- Wide and narrow band spectrogram.
- Pitch tracks (as with WASP).
- Play a recorded sound in reverse.
- Process a speech signal by filtering it (as with SFS: high-pass, low-pass, band-pass, band-stop).
- Enhance certain frequency regions; segment and label words, syllables, or individual phonemes.
- Show an intensity contour.
- Put work in graphic form for printing including Encapsulated PostScript files with integrated mathematical and phonetic symbols.
- Extract individual sounds for further analysis.
- Learning algorithms.
- Measure voice onset time (VOT).
- Statistics:
- Multidimensional scaling.
- Principal component analysis.
- Discriminant analysis.
Website: www.fon.hum.uva.nl/praat
Support:
Developer: The Orca Team
License: GNU General Public License v2.0

Praat Speech Analyser is written in C and C++. Learn C with our recommended free books and free tutorials. Learn C++ with our recommended free books and free tutorials.
Related Software
| Speech Tools | |
|---|---|
| Piper | Fast, local neural text to speech system |
| Tortoise | Multi-voice text-to-speech system trained with an emphasis on quality |
| Coqui TTS | Offers pretrained models in more than 1,100 different languages |
| Bark | Transformer-based text-to-audio model. |
| Dia | 1.6B parameter text to speech model |
| Festival | General multi-lingual speech synthesis system |
| PraatSpeechAnalyser | Software for speech analysis and synthesis |
| Speech Note | Speech to Text, Text to Speech and Machine Translation |
| Mimic 3 | Lightweight Text to Speech engine |
| OrcaScreenReader | Scriptable screen reader |
| MeloTTS | High-quality multi-lingual text-to-speech library |
| Parler-TTS | Lightweight text-to-speech (TTS) model |
| Flite | Small, fast run time text to speech synthesis engine |
| RHVoice | Gives the visually impaired a synthesis voice with their screen reader |
| eSpeak NG | Continuation of the eSpeak project |
| eSpeak | Speech synthesizer using a formant synthesis method |
| Orpheus-TTS-FastAPI | High-performance self-hosted text-to-speech server |
| Gespeaker | GTK-based frontend for eSpeak |
| VoiceGen | Simple text-to-speech application |
| Glate | Google Translator and Text To Speech Service |
Read our verdict in the software roundup.
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