Sound: To Pitch...

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

Purpose

to perform a pitch analysis, optimized for speech.

Settings

The settings that control the recruitment of the candidates are:

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 0.75 / (pitch floor), e.g. 0.01 seconds if the pitch floor is 75 Hz; in this example, Praat computes 100 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 3 longest periods long, i.e., if the pitch floor is 75 Hz, the window will be 3/75 = 0.04 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.

A post-processing algorithm seeks the cheapest path through the candidates. The argument that determines the cheapest path is:

Pitch ceiling (Hz) (standard value: 600 Hz)
candidates above this frequency will be ignored.

Algorithm

This is the algorithm described at Sound: To Pitch (ac)..., with all the parameters not mentioned above set to their standard values.

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© ppgb, September 16, 2003