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 License.

• 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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