Frequency Detection

We are going to sort the frequencies according to the descending order of the magnitude of the FFT. Please read the online help about the sort function, as we will need it.

Once we have sorted the magnitudes, we shall read the frequency index at which the second (in magnitude) pitch occurs and read the corresponding frequency in Herz. Then, using the right units, we will display the corresponding period in hours, and see that it is 24 hours.