Chapter 17: EQ 139
Chapter 17: EQ
The following EQ features are available:
• A built-in EQ is available on each input channel and FX
return.
• Graphic EQs are available for use on output channels.
• EQ plug-ins can be used on input and output channels.
• All channels let you insert hardware EQ processors.
• Dynamics settings can be copied, pasted, stored and re-
called using Snapshots and Presets.
Built-In EQ
Different types of built-in EQ are available for input channels,
FX returns, and outputs.
Input Channels Each input channel provides a high-pass filter
plus a built-in four-band parametric EQ. EQ can be set for dig-
ital or analog mode. In digital mode only, the four-band EQ
provides selectable Bell/Shelf shapes for the Hi and Lo bands.
Input channel EQ can be configured as pre- or post-Dynamics
on a per-channel basis.
FX Returns Each FX return provides a built-in two-band EQ.
FX return EQ can be used in digital or analog mode; in digital
mode, the bands can be individually configured for Bell or
Shelf modes.
Graphic EQs
Output busses can have a built-in Graphic EQ assigned to
them.
EQ Plug-Ins
EQ plug-ins can be used on input and output channels. When
assigned in the plug-in racks, EQ plug-ins can be inserted on
individual mono or stereo channels or fed by busses. EQ
plug-ins can be adjusted using the ACS, using the Output en-
coders (in Insert mode), or from the on-screen Plug-Ins page.
Plug-in presets can be saved and loaded.
Hardware Inserts
You can insert a hardware EQ processor and control its in/out
state and insert position on-screen. See Chapter 19, “Hard-
ware Inserts.”)
Built-In EQ Parameters
HPF
Each input channel provides a fourth-order high-pass filter
(HPF) with adjustable corner frequency and in/out control.
The input HPF defaults to 20 Hz, out-of-circuit.
You can adjust HPF frequency and in/out state from each in-
put strip, from the ACS, or on-screen.
Input Parametric EQ
Input channels and FX returns provide built-in parametric EQ.
The following parameters are available in the built-in EQ, and
can be adjusted using the EQ controls in the ACS or on-screen.
EQ In
EQ In toggles the built-in EQ processor (all bands) in or out of
circuit on the selected channels. EQ In/Out can be controlled
from the ACS or on-screen.
EQ Status LED
The (red) channel EQ In LED indicates EQ in/out status as
shown in the following table.
Analog and Digital EQ Modes
The Analog/Digital button toggles the built-in parametric EQ
between digital mode and analog mode, on a per-channel ba-
sis. Analog/digital mode switching is available on-screen.
Digital Mode A standard digital parametric EQ. Frequency
range of 20 Hz to 20 kHz and gain range of +/–18 dB are avail-
able on all four bands. Hi and Lo bands can be Bell (default) or
Shelf. Digital Q is expressed in Q factor terms in the range 10
(left, a narrow band) to 0.1 (right, a wide band). Digital Mode
is the default EQ mode.
The EA controls in the ACS provide a unified set of con-
trols for both built-in and plug-in EQ processing.
Color EQ Status
(none) Not in circuit
Red In circuit
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