iLive
Fixed Format Getting Started Guide
17
AP7141 iss.6b
A 1/3 octave 28-band
GEQ
(graphic equaliser) is provided for each of the 32 mix outputs.
Constant-Q
Symmetrical cut/boost where the width (Q) of
the filter is a constant 1/3rd octave for any amount of cut or
boost.
Proportional-Q
Provides smooth wide Q for low cut/boost,
which progressively tightens beyond 1/3rd octave for max
boost/cut.
Digi-Q
Gain and width are optimised to minimise band
interaction and to provide a frequency response as close to
the slider positions as possible.
Hybrid
Allen & Heath have developed the best of both
worlds. The boost is proportional-Q for smooth and warm
small boost settings. The cut is Constant-Q providing
clinical 1/3rd Octave attenuation with minimal band
interaction.
GEQ on faders
Press a mix master
SEL
key to access the processing for
that master. The GEQ is controlled from the screen or on the
faders by pressing the Surface
GEQ FADER FLIP
key.
Press again to toggle between frequency banks and return
to normal fader mode.
In GEQ Fader Flip mode
- The EQ frequencies are indicated
on the strip LCDs above. The strip meters display the RTA
(PAFL signal if one is selected). The red PK meters display
the dominant frequency if this option has been set in the
SURFACE / Preferences
screen.
The fader on the right becomes the master or currently
active send level for the mix. Hold down
ALT VIEW
to
display the EQ dB settings on the strip LCDs. Press the strip
SEL
keys to reset individual frequency bands to 0dB.
Frequency response
shows the combined
response of the slider settings. Can show the
response differences between the four GEQ
models.
RTA display
with Peak Band follows the PAFL
signal. Go to
SURFACE SETUP / Preferences
/ Surface
to turn the Peak Band display option
on or off.
Frequency bands
can be adjusted by touching
and dragging the sliders or turning the screen
Rotary control.
GEQ Fader Flip
to display and control the
frequency bands using the faders.
GEQ Mode
to choose one of four models that
emulate classic equaliser types plus a unique
hybrid response type:
Low frequency bands
31, 40 and 50Hz added in V1.9.
GEQ Fader Flip key
Mix master strip – Master fader or channel send level depending on active
MIX
key
Press
SEL
key to reset a band to ‘0’