User Manual

De-Hummer
A repair plug-in with general applications to any recording. Eliminates hum noise that often
stems from electrical interference with audio equipment due to improper cabling or grounding.
Typically 50 or 60 cycle hum is a harmonic noise, consisting of a fundamental frequency and
subsequent partial harmonics starting at twice this fundamental frequency.
A graph lets you see the frequency and harmonics being targeted as you adjust this plug-
in’s controls.
The De-Hummer FairlightFX
De-Hummer has the following controls:
 Bypass: Toggles this plug-in on and off.
 Frequency: Target source fundamental frequency. A knob lets you make a variable
frequency selection, while radio buttons let you select common frequencies that
correspond to 50Hz/60Hz electrical mains that are the typical culprits for causing hum.
 Amount: Adjusts how much De-Hum extraction you want to apply.
 Slope: Adjusts the ratio of fundamental frequency to partial harmonics, the adjustment
of which lets makes it possible for various kinds of hum to be targeted. For example, a
value of 0 biases hum extraction towards the fundamental frequency, while a value of
0.5 gives equal extraction of all harmonics (up to 4), and finally a value of 1.0 targets the
higher frequency partials.
Chapter – 159 FairlightFX 3294