Technical information

APPENDIX 12
The 4020 Retro EQ has four bands – low-frequency LF shelf, low mid–frequency
LMF parametric, high mid–frequency HMF parametric, and high-frequency HF
shelf – together with high-pass and low-pass  lters. Other controls include
Input level, Output level, and phase invert switches for each channel.
What’s unique about this plug-in is that the slope (Q) of the shelving and
parametric equalizers varies as the gain is adjusted. The  lter section uses a
new design that varies the slope from a gradual 6 dB/octave at the selected
frequency to a maximum of 24 dB/octave. Also, both the EQ and  lter section
frequency controls are calibrated in octaves (instead of decades). The EQ
4020 Retro EQ
Figure A12.1
The 4020 Retro EQ.