Sakset fra et annet fora;
Details are in the Graph menu help: Variable smoothing applies no smoothing below 100 Hz, 1/3 octave above 10 kHz and varies between 1/48 and 1/3 octave from 100 Hz to 10 kHz.
At 1 kHz the smoothing is 1/6 octave.
Høres ut som de har forsøkt å implementere omtrent...