Praat 4.1, 5 June 2003

General:

•  MacOS X edition.
•  Removed licensing.
•  More than 99 percent of the source code distributed under the General Public Licence.
•  Windows 2000 and XP: put preferences files in home directory.

Phonetics:

•  Spectrum: the sign of the Fourier transform has changed, to comply with common use in technology and physics. Old Spectrum files are converted when read.
•  Spectral moments.
•  Many jitter and shimmer measures, also in the Sound editor window.
•  PitchTier: shift or multiply frequencies (also in ManipulationEditor).
•  TextGrid: shift times, scale times.
•  Overlap-add synthesis: reduced buzz in voiceless parts.
•  Sound: Change gender...
•  Editors: Intro 3.6. Viewing a spectral slice.
•  Editors: Get spectral power at cursor cross.
•  Sound: To PointProcess (periodic, peaks)...
•  Ltas: merge.

Listening experiments:

•  Goodness judgments.
•  Multiple ResultsMFC: To Table, so that the whole experiment can go into a single statistics file.
•  Stimulus file path can be relative to directory of experiment file.
•  ExperimentMFC: multiple substimuli for discrimination tests.

Statistics:

•  New Table object for column statistics: Pearson's r, Kendall's τ-b, t-test.
•  Table: scatter plot.
•  Table: column names as variables.
•  T-test.
•  TableOfReal: Extract rows where column...
•  TableOfReal: Get correlation....
•  Correlation: Confidence intervals...
•  SSCP: Get diagonality (bartlett)...

OT learning:

•  Tutorial for bidirectional learning.
•  Random choice between equally violating candidates.
•  More constraints in metrics grammar.
•  Learning in editor.

Graphics:

•  Printing: hard-coded image interpolation for EPS files and PostScript printers.

Scripting:

•  New Formulas tutorial.
•  Formulas: can use variables without quotes.
•  Formulas for PitchTier, IntensityTier, AmplitudeTier, DurationTier.
•  Refer to any matrices and tables in formulas, e.g. Sound_hello (x) or Table_everything [row, col] or Table_tokens [i, “F1”].
•  Assignment by modification, as with += -= *= /=.
•  New functions: date$(), extractNumber, extractWord$, extractLine$. See Formulas 6. String functions.
•  Scripting 5.8. Including other scripts.
•  String formulas in the calculator.
•  Stopped support of things that had been undocumented for the last four years: let, getnumber, getstring, ARGS, copy, proc, variables with capitals, and strings in numeric variables; there are messages about how to modify your old scripts.
•  Disallowed ambiguous expressions like -3^2.

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