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Using the 4020 Retro EQ Plug-In
The 4020 Retro EQ is a highly stylized combintation of equalzers and filters.
The following sections cover basic operations of the EQ and filter algorithms in
the4020 Retro EQ, provide a more in depth descript of some of the features of
the 4020 Retro EQ, and outline some applciations of the 4020 Retro EQ plug-in.
Basics
There are three types of EQs included in the 4020 Retro EQ (high shelf,
parametric, and low shelf), and two types of filters (high pass and low pass).
High Pass Filter (HPF)
High pass filters remove signals below the selected
frequency, and pass the signals above the selected
frequency unaffected (hence the term high pass). High
pass filters have a slope measured in the amount of
signal reduction (in dB) per frequency octave. Typically
these values are in multiples of 6 dB / Oct. At the exact
selected frequency of the high pass filter the signal
reduction is usually - 3dB, however this can change based
on filter design.
The 4020 Retro EQ high pass filter has a unique design
element that gradually increases the filter slope from an
initial slope of 6 dB / Oct to a maximum of 24 dB / Oct.
Low Pass Filter (LPF)
Low pass filters remove signals above the selected
frequency, and pass the signals below the selected
frequency unaffected (hence the term low pass). Low
pass filters have a slope measured in the amount of
signal reduction (in dB) per frequency octave. Typically
these values are in multiples of 6 dB / Oct. At the exact
selected frequency of the low pass filter the signal
reduction is usually - 3dB, however this can change based
on filter design.
FREQUENCY
dB
FREQUENCY
dB
