Update of code comments on inputs and outputs

v1.0.1

Update pitch_track_segments.m

First release of tonal detectors matlab functions

This is the first release of tonal detection functions coded in Matlab and discussed in
L. Bouffaut, S. Madhusudhana, V. Labat, A. Boudraa and H. Klinck “Comparative study
of tonal detectors for low frequency vocalizations of blue whales,” in J. Acoust. Soc. Am,
(submitted)

The repository includes a function for:

• the method described in [Baumgartner, 2011] referred to as "cost-function" detector;
• the Harmonic Product Spectrum (HPS) algorithm, as described in [Cuadra, 2001];
• an instantaneous frequency estimator and;
• the Yin estimator adapted to low-frequency sounds.

In addition, a function to convert continuous functions outputs (such as the instantaneous frequency.) into separated tonals is added as well as, a function to generate synthetic observations with a controlled SNR.