User manual

UAD Powered Plug-Ins - 170 - Cambridge EQ
Gain Knob This parameter determines the amount by which the frequency setting for the
band is boosted or attenuated. The available range is ±20 dB.
Q (Bandwidth)
Knob
The behavior of the Q parameter varies depending on the band mode and
the gain. For this reason Q is detailed separately in the parametric and shelf
mode sections (see “Parametric Q” on page 170 and “Shelf Q” on
page 173).
Parametric EQ
A band is in parametric mode when shelf mode is disabled (see “Shelf Enable
Button” on page 173). Three types of parametric EQ are available, as deter-
mined by the Parametric Type selector.
Parametric Type
Selector
The Parametric Type selector changes the response of the band
controls to reflect the behavior of various analog equalizers. It is
a global control for all 5 bands, and has no effect on the low
and high cut filters. Click the Parametric Type display to rotate between Types
I, II, and III.
The filter algorithm is the same in all three parametric types. The difference is
in the dependency between the gain and Q parameters. Each parametric
type has its own response characteristics.
In Type I mode, the Q remains constant regardless of the gain setting. In Type
II mode, the Q increases as gain is boosted, but remains constant as gain is
attenuated. In Type III mode, the Q increases as gain is boosted and attenu-
ated. See Figure 60, Figure 61, and Figure 62.
Parametric Q The Q (bandwidth) knob sets the proportion of frequencies surrounding the
center frequency to be affected by the gain control. The Q range is 0.25–16;
higher values yield sharper slopes.
Note that the Q numeric value in relation to its knob position is warped (i.e.
not linear) and varies according to the parametric type.