This is what the power spectrum looks like for this
sample
This is what the pitch scale looks like for the same sample but averaged over all windows
This is a frame by frame visualisation for the same sample, blue is most intense, mustard is least intense. The small blue dots are due to the GIF image coding process.
This is what the power spectrum looks like for this
sample
This is what the pitch scale looks like for the same sample but averaged over all windows