Allen&Heath GLD-112 Reference Guide - Manual (Page 28)

GLD Touch Screen Reference V1.4 – Issue 1 28 ALLEN & HEATH
Dynamic EQ
DynEQ4 is a model of the industry standard stereo 4-band
Dynamic Equaliser. It is an advanced processing tool
providing four bands of equalisation that respond to the
dynamics of the signal.
The Dynamic EQ can be loaded into one or more of the 8FX
slots and then inserted into any of the input or mix
channels.
Main Graph - Displays the 4 band frequency response, with
the shaded fills showing dynamic activity and the solid
outline showing maximum cut/boost for each band. Bands
grey out if they are bypassed.
Thresh View - Primary control panel with main cut/boost
and dynamics controls for each band. You can drag the
points in the graph to adjust frequency in this mode.
Comp/Exp - Sets the maximum amount of compression
(EQ cut) or expansion (EQ boost) for the band when the
sidechain signal level is ‘Above’ or ‘Below’ the threshold
setting. Centre position is zero dB flat.
Above/Below - Selects whether the EQ operates when the
signal is above or below the threshold.
Threshold (-50dBu to 18dBu) - Sets the level at which the
sidechain GR cut or boost occurs for that band. A threshold
dependent ‘zoom’ meter is displayed.
Horizontal Gain meter - Shows Dynamic metering of Cut
(green) and Boost (red).
Choose one of two Attack/Release modes:
• Std9 – standard, smooth frequency conscious release.
• Fast9 – has a fast release.
Filter View - For setting up the frequency response for each
band.
Frequency control - All 4 bands are full range 40Hz -
18kHz.
Width control - LF and HF become shelving at the widest
setting.
• Band1: LF Shelf, Bell 2.1–1/9 octave
• Band2: Bell 2.25–1/9 octave
• Band3: Bell 2.25–1/9 octave
• Band4: HF Shelf, Bell 2.1–1/9 octave
Listen - Touch to momentarily listen to the sidechain filter
signal using the PAFL bus.
SC Config - Left and Right signals are summed to produce
a mono sidechain for each band. Choose one of two
modes:
Cascade - The sidechain for each band is fed from the
previous band. Each band is affected by the previous
band activity.
Parallel - All sidechains are fed from the input to the
DynEQ. Avoids band interaction.
Bypass - Individual bands or the whole EQ can be switched
in or out. The curve and controls grey out when the band is
bypassed.
Master Trim and Meter - Lets you adjust the output +/-
12dB to compensate for the effect of the EQ on overall
level. The meter displays the stereo output signal.
Multiband Compressor
Two multiband compressor types provide independent
compression control over different frequency bands. This is
an advanced mixing tool for mastering and live sound
control. It gives more precise control over the dynamics and
less pumping effect than the more common single band
compressor.
MultiBD3 (3-band):
MultiBD4 (4-band):
The Multiband Compressor can be loaded into one or more
of the 8FX slots and then inserted into any of the input or
mix channels.
Main Graph - A WYSIWYG graph displays the resulting
crossover frequency response. Shaded red fills show
dynamic gain reduction. The yellow curve shows makeup
gain for each band, and the grey curve shows maximum
potential gain reduction. Bands grey out if they are
bypassed.
Slope - Choose the crossover slope - 6, 18, or 24
dB/octave. Slope 6 works well with the 3-band compressor.
It has minimal phase summing distortion and sounds
smooth. It is typically used for programme mastering. Slope
18 and 24 provide more band isolation and work well with
the 4-band compressor for vocal and instrument control.