I want to do a small program, similarity computing songs I pyAudioAnalysis is utilized to extract the characteristics of the audio, dividing the song became the first time length is 16 s, arithmetic value is 4 s arithmetic progression, and then use this function mtFeatureExtraction () to calculate the characteristics of each section, but this function mtFeatureExtraction () the window and calculation of step length don't know how to take? So I choose the parameter is mt_wi=4, mt_step=4, st_win=2, st_step=2, such calculation after running time is too long, however, the operating system to suspend, tell your bosses, thanks everybody here!