  A fast implementation of fundamental frequency estimation is presented in
this work. The algorithm is based on a frequency-domain approach. It was mainly
develop for tonal sounds and used in Canary bird song analysis. The method was
implemented but not restricted for this kind of data. It could be easily
adapted for other proposes. Python libraries were used to develop a code with a
simple algorithm to obtain fundamental frequency. A simple open source code is
provided in the local university repository.
