1. AN INTRODUCTION TO PRAAT Tina John M.A. Institute of Phonetics and digital Speech Processing - University Kiel Institute of Phonetics and Speech Processing - University München

2. Introduction to Praat Tina John PRAAT Developer: Paul Boersma & David Weenink Where: Institute of Phonetic Sciences University of AmsterdamInstitute of Phonetic Sciences Intension: Doing Phonetics by Computer Intension http://www.praat.org

3. Introduction to Praat Tina John PRAAT - INTENSION Preparation Analysis Query digital time signal (acoustical) Synthesis annotate link to signals signal processing derived signals (e.g. spectral data) signal parts query Signals Annotsations query Figures Statistics p << 0.001 Tables

4. Introduction to Praat Tina John CONCEPT uses Object Window, Picture Window, Info Window, Editors and Scripts works with –objects Sounds, Annotations, Tables, Signal Tiers... –several functions for particular objects edit, draw, analyse... –several functions for object collections concatenate, multiply,...

5. Introduction to Praat Tina John G367A000.wav INPUT base material: speech signal files –read from file –automatically converted to Sound Object

6. Introduction to Praat Tina John carried out internally –e.g. signals are derived from input sound within praat –derived signals might converted to signal objects and thus be saved to file SIGNAL PROCESSING

7. Introduction to Praat Tina John ANNOTATION - CONCEPT carried out by TextGrid objects –created for a sound object –at one or more levels intervals (segments) points (targets)

8. Introduction to Praat Tina John ANNOTATION always bound to time several levels are not related to each other

9. Introduction to Praat Tina John ANNOTATION TextGrid objects are written to TextGrid files –in ASCI format (simple text) –includes type, time marks and labels

10. Introduction to Praat Tina John QUERY for very simple queries only countings, sequences, positions, structures need to be queried via self written praat scripts Extracts: –segment intervals of particular (any) label –time marks of particular label

11. Introduction to Praat Tina John Scripting Praat provides a simple scripting language All actions from Windows and Editors are recorded and can be pasted from a history to a script (text editor). These commands can be edited and extended by new commands. It is easy to repeat a set of commands with new parameter without using the graphical interface.

12. Introduction to Praat Tina John ANALYSIS appear as functions for particular objects –Duration –Spectral Analyses Formantfrequency Pitch Intensity complex analyses –COG –... –many more

13. Introduction to Praat Tina John SYNTHESIS Manipulation: –Pitch –Intensity –Pulses –Duration Sytheses: –PSOLA –LPC –...

14. Introduction to Praat Tina John OUTPUT data can be written to file for reuse or export –Sound files –Signal files –TextGrid files –Text files (matrices) Pictures from Praat Picture made by „draw“: – Windows Metafile –ESP

15. Introduction to Praat Tina John END OF THEORY Lets start with the praxis