Window function

This option selects which window function the spectrum bar applies to audio prior to the FFT, to reduce spectral leakage. All functions are bell-shaped or triangular, except for the rectangular window.

Blackmanhigher-order generalized cosine
Blackman Harrishigher-order generalized cosine
Hammingminimizes the nearest side lobe
Hann (AKA Hanning)classic raised cosine
Rectangularbrick wall
Welchparabolic section