Sound: To Formant (sl)...

A command that creates a Formant object from every selected Sound object. Not recommended for general use.

Purpose

to perform a short-term spectral analysis, approximating the spectrum of each frame by a number of formants.

Settings

The same as with Sound: To Formant (burg)....

Algorithm

The algorithm is based on the implementation of the `Split Levinson' algorithm by Willems (1986). This algorithm will always find the requested number of formants in every frame, even if they do not exist. The standard routine (Sound: To Formant (burg)...) yields much more reliable formant values, though it is more sensitive to the Maximum formant argument.

Because of the general funny behaviour of the Split-Levinson algorithm, we did not bother to implement an analysis of the bandwidths. They are all set arbitrarily to 50 Hz.

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© ppgb, December 15, 2002