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Chapter 3 - Overview
34 Q20 Reference Manual
Multiband EQs
2 Band Sweep Shelf EQ, 3 Band Parametric EQ, and 4 Band
Parametric EQ
Multiband EQs can be used to flexibly and accurately tailor the tonality of a signal.
The 3 band and 4 band parametric EQs in the Q20 can be used to boost and cut
multiple bands, with the added flexibility of controlling the bandwidth of one or
two mid bands. The multiband EQs provide plenty of equalization in a single Block
effect. For instance, the 2 band sweep shelving EQ can be used as a loudness control
be boosting both low and high frequencies (Lowpass cutoff frequency set to 150Hz,
Highpass cutoff frequency set to 4kHz). The three band parametric can be applied
to a mix to simultaneously eliminate hiss, boost bass, and highlight a cowbell.
Although it is possible to overlap the different bands, you should be careful to not
to be redundant.
2 Band Sweep Shelving
+14dB
+11dB
Cutoff
Frequency
0dB
-11dB
-14dB
Gain = +14dB
(boost)
Gain = -14dB
(cut)
Cutoff
Frequency
3 Band Parametric
+14dB
+11dB
Cutoff
Frequency
0dB
-11dB
-14dB
Cutoff
Frequency
Bandwidth
4 Band Parametric
+14dB
Cutoff
Frequency
0dB
-11dB
-14dB
Cutoff
Frequency
BandwidthBandwidth
5 Band Graphic EQ
A graphic EQ is a set of bandpass filters of fixed frequencies and of equal
bandwidths, spaced evenly across the audible frequency range. The 5 Band Graphic
EQ in the Q20 has bandwidths that are two octaves wide at 63Hz, 250Hz, 1kHz,
4kHz and 16kHz. Graphic EQs are used for general tonal shaping.
5 Band Graphic EQ
0dB
+14dB
Frequency
-14dB
Bands