Talk:Pitch detection algorithm

Given that "The low extreme for basses is generally C2" which corresponds to about 65 Hz, and people generally speak at about twice this the example "Autocorrelation methods need at least two pitch periods to detect pitch. To detect a fundamental frequency of 40 Hz this means that at least 50 milliseconds (ms) of the speech signal must be analyzed. However, during 50 ms, speech with higher fundamental frequencies may not necessarily have the same fundamental frequency throughout the window.[9]" sounds a bit contrived.