A command that creates a Pitch object from every selected Sound object.

Purpose

to perform a pitch analysis based on a cross-correlation method.

Algorithm

The algorithm performs an acoustic periodicity detection on the basis of a forward cross-correlation analysis.

Settings

Time step (s) (standard value: 0.0)

the measurement interval (frame duration), in seconds. If you supply 0, Praat will use a time step of 0.25 / (pitch floor), e.g. 0.00333333 seconds if the pitch floor is 75 Hz; in this example, Praat computes 300 pitch values per second.

Pitch floor (Hz) (standard value: 75 Hz)

candidates below this frequency will not be recruited. This parameter determines the length of the analysis window: it will be 1 longest period long, i.e., if the pitch floor is 75 Hz, the window will be 1/75 = 0.01333333 seconds long.

Note that if you set the time step to zero, the analysis windows for consecutive measurements will overlap appreciably: Praat will always compute 4 pitch values within one window length, i.e., the degree of oversampling is 4.

The other settings are the same as for Sound: To Pitch (ac)....

Usage

The preferred method for speech is Sound: To Pitch.... The command described here is mainly for experimenting, or for applications where you need short time windows.

Links to this page

• Periodicity menu
• Voice 6. Automating voice analysis with a script