The following people contributed source code to Praat:
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Paul Boersma: user interface, graphics, printing, sound, spectral analysis, pitch analysis, formant analysis, intensity analysis, annotation, speech manipulation, voice report, listening experiments, articulatory synthesis, optimality-theoretic learning, tables, formulas, scripting, and adaptation of PortAudio, GLPK, regular expressions, and Opus.
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David Weenink: feedforward neural networks, principal component analysis, multidimensional scaling, discriminant analysis, LPC, VowelEditor, and adaptation of GSL, LAPACK, fftpack, regular expressions, Espeak, Ogg Vorbis, and Opus.
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Stefan de Konink and Franz Brauße: major help in port to GTK.
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Tom Naughton: major help in port to Cocoa.
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Erez Volk: adaptation of FLAC and MAD.
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Ola Söder: kNN classifiers, k-means clustering.
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Rafael Laboissière: adaptation of XIPA, audio bug fixes for Linux.
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Darryl Purnell created the first version of audio for Praat for Linux.
We included the following freely available software libraries in Praat (sometimes with adaptations):
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XIPA: IPA font for Unix by Fukui Rei (GPL).
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GSL: GNU Scientific Library by Gerard Jungman and Brian Gough (GPL 3 or later).
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GLPK: GNU Linear Programming Kit by Andrew Makhorin (GPL 3 or later); contains AMD software by the same author (LGPL 2.1 or later).
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PortAudio: Portable Audio Library by Ross Bencina, Phil Burk, Bjorn Roche, Dominic Mazzoni, Darren Gibbs, version 19.7.0 of April 2021 (CC-BY-like license).
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Espeak: text-to-speech synthesizer by Jonathan Duddington and Reece Dunn (GPL 3 or later).
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MAD: MPEG Audio Decoder by Underbit Technologies (GPL 2 or later).
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FLAC: Free Lossless Audio Codec by Josh Coalson and Xiph.Org, version 1.3.3 (FLAC BSD 3-clause license).
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Ogg Vorbis: audio compression by Christopher Montgomery (Ogg Vorbis BSD 3-clause license).
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Opus: audio compression by Jean-Marc Valin, Gregory Maxwell, Christopher Montgomery, Timothy Terriberry, Koen Vos, Andrew Allen and others (Opus BSD 3-clause license).
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SILK: audio compression by Skype Limited (Skype Limited BSD 3-clause license).
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fftpack: public-domain Fourier transforms by Paul Swarztrauber, translated to C by Christopher Montgomery.
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LAPACK: public-domain numeric algorithms by Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd., Courant Institute, Argonne National Lab, and Rice University, C edition by Peng Du, Keith Seymour and Julie Langdou, version 3.2.1 of June 2009.
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Regular expressions by Henry Spencer, Mark Edel, Christopher Conrad, Eddy De Greef (GPL 2 or later).
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Unicode Character Database by Unicode Inc., version 14.0 of September 2021 (Unicode Inc. license agreement)
Most of the source code of Praat is distributed under the General Public License, version 2 or later. However, as Praat includes the above software written by others, the whole of Praat is distributed under the General Public License, version 3 or later.
For their financial support during the development of Praat:
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Netherlands Organization for Scientific Research (NWO) (1996–1999).
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Nederlandse Taalunie (2006–2008).
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Talkbank project, Carnegie Mellon / Linguistic Data Consortium (2002–2003).
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Stichting Spraaktechnologie (2014–2016).
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Spoken Dutch Corpus (CGN) (1999–2001).
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Laboratorium Experimentele OtoRhinoLaryngologie, KU Leuven.
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DFG-Projekt Dialektintonation, Universität Freiburg.
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Department of Linguistics and Phonetics, Lund University.
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Centre for Cognitive Neuroscience, University of Turku.
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Linguistics Department, University of Joensuu.
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Laboratoire de Sciences Cognitives et Psycholinguistique, Paris.
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Department of Linguistics, Northwestern University.
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Department of Finnish and General Linguistics, University of Tampere.
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Institute for Language and Speech Processing, Paradissos Amaroussiou.
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Jörg Jescheniak, Universität Leipzig.
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The Linguistics Teaching Laboratory, Ohio State University.
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Linguistics & Cognitive Science, Dartmouth College, Hanover NH.
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Cornell Phonetics Lab, Ithaca NY.
Finally we thank:
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Ton Wempe and Dirk Jan Vet, for technical support and advice.
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Daniel Hirst and Daniel McCloy, for managing the Praat Users List.
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Rafael Laboissière and Andreas Tille, for maintaining the Debian package.
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Jason Bacon and Adriaan de Groot, for maintaining the FreeBSD port.
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José Joaquín Atria and Ingmar Steiner, for setting up the source-code repository on GitHub.
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Hundreds of Praat users, for sending suggestions and notifying us of problems and thus helping us to improve Praat.
Links to this page
© Paul Boersma 2022