Built-In Eq Parameters - Avid Technology S3L System Manual

Built-In EQ Parameters

4-Band EQ
The following 4-band EQ parameters are available:
EQ In
EQ In toggles the built-in EQ processor (all bands) in or out of
circuit on the selected channels, and can be adjusted using Chan-
nel Control or on-screen.
Analog and Digital EQ Modes
The Analog/Digital button toggles the built-in EQ between digi-
tal mode and analog mode, on a per-channel basis, and is adjusted
on-screen.
Digital Mode
A standard digital parametric EQ. Frequency range
of 20 Hz to 20 kHz and gain range of +/–18 dB are available 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 de-
fault EQ mode.
Analog Mode
An EQ with a response modeled on that of an ana-
log console renowned for its EQ section. Frequency range is lim-
ited to match, and the outer bands provide shelving only. Analog
Q is expressed in octaves of bandwidth in the range 0.1 (left, a
tenth of an octave) to 2 (right, two octaves.)
The HPF does not change when the EQ is switched between
Digital and Analog mode.
Gain, Frequency, and Q/Bandwidth
Each band of the built-in 4-band EQ provides the following pa-
rameters, and are adjusted using Channel Control or on-screen:
Gain
Boosts or cuts the corresponding band. The LEDs around
the Gain encoder light from the center-point to the right (boost),
or from the center-point to the left (cut) to illustrate current Gain.
Freq
Sets the center or corner frequency for each band, as fol-
lows:
• Freq sets the center frequency for the Hi-Mid and Lo-Mid
bands, and for the Hi and Lo filters when in Bell mode.
• Freq sets the corner frequency for the Hi and Lo filters
when in Shelf mode. (See "Bell and Shelf Modes for Hi and
Lo Filters" on page 152.)
Rotating the encoder clockwise increases the frequency for that
band; rotating it counter-clockwise decreases the frequency. The
available range of each band depends on the EQ mode (Digital or
Analog). See "Control Ranges for Built-In 4-Band EQ (All
Modes)" on page 159.
152 S3L System Guide
Q (Q/Bandwidth)
Controls Q (in digital mode) or bandwidth (an-
alog mode).
In Digital mode, Q determines Q factor. When the Hi or Lo fil-

ters are in Shelf mode, the Q knob determines the Q of the shelf.
In Analog mode, this control changes to a bandwidth control

which performs essentially the same function.
Band In/Out
Each of the available EQ bands can be taken in or
out (bypassed) using their encoder (or on-screen).
The Gain knob for each band serves as the in/out control by

pushing the encoder. The indicator LED lights to indicate band
In. (Same for Input encoders and Channel Control encoders when
assigned to EQ).
On-screen, a dedicated In/Out switch is located just below

each Gain knob.
Bell and Shelf Modes for Hi and Lo Filters
In digital EQ mode, the Hi and Lo filters can be toggled between
Bell and Shelf modes.
When in Bell mode, the Hi or Lo filters function as a parametric
EQ with variable Q. When in Shelf mode, the Hi module is a
high-shelf EQ, and the Lo module is a low-shelf EQ. For instruc-
tions on configuring these bands for Bell or Shelf mode, see "Ad-
justing EQ" on page 153.
HPF
The following built-in HPF parameters are available:
In
Toggles the built-in HPF processor in or out of circuit on the
selected channels.
Freq
Sets the corner frequency for the HPF on the selected chan-
nels.