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’
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