Allen&Heath GLD-112 Reference Guide - Manual (Page 29)

GLD Touch Screen Reference V1.4 – Issue 1 29 ALLEN & HEATH
Attack/Release modes - There are two manual and 4
automatic dynamics modes:
• Peak Manual
• RMS Manual
• Auto Punch
• Auto Opto
• Slow AutoF
• Fast AutoF
Knee - Hard or Soft (easy knee model).
Link and Relative modes:
There are three operating modes with two buttons at the
top right of the screen:
Normal - Link and Rel buttons turned off. Independent
control of each band.
Link - All band parameters linked for quick setup.
Relative - All band parameters linked for changes relative
to settings made before the Rel button was turned on.
Per band controls:
Ratio - 1:1 (no compression) to 20:1 (maximum
compression)
Gain - -6dB to +18dB
Threshold (-50dBu to 18dBu) - Sets the level at which the
sidechain gain reduction occurs for that band. A threshold
dependent ‘zoom’ meter is displayed.
In/Out - Individual band bypass. The curve and controls
grey out for the band.
PFL - Momentary listen to the band solo’d to PAFL.
Silences the other bands.
Sidechain Meter - Shows sidechain signal level and
threshold point.
Bypass - Switches the whole compressor in or out. The
curve and all band controls grey out when the compressor
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.
Transient Controller
This is an accurate model of the industry standard Transient
Signal Processor.
Transient Signal Processors provide cut and boost of the
attack and sustain envelopes of the input signal. This gives
the sound engineer greater control over the transient
behaviour of audio programme. The processor is auto-
threshold which boosts or cuts specific parts of a signal
envelope using auto attack and release times thus making
control very simple. The unit has two independent linkable
channels of processing, each with pre-gain and post-gain
make-up and two optimised modes of operation.
Controls:
Attack – Sets the amount of gain applied to the attack
portion of a transient. Allows up to 15dB boost or cut on
the initial onset of a transient signal.
Sustain – Sets the amount of gain applied following a
transient, boosting or cutting the sustain envelope of the
signal. Allows up to 24dB of cut or boost. Changing the
sustain gain on drums can help add or remove
reverberation and can transform the tonal quality of the
sound.
Pre Gain – Can boost or cut up to 15dB before processing.
Post Gain – Can boost or cut up to 15dB after processing.
In – switches the processor in and out. These are
independent controls for each channel. The user interface
greys out when the processor channel is out.
Metering – The unit provides signal and peak LED
indicators for both input and output. The signal LED has
three stages: Green for signal presence, yellow for nominal
level above '0' and orange when approaching clipping.
Mode – The mode switch toggles between Transient and
Continuous mode. If you hear unwanted artefacts then try
changing the mode.
• Transient Mode - The default Transient Mode is designed
to be used on percussive, transient material. Its automated
attack and release reacts quickly meaning that even the
sharpest of transients will be caught and processed with
minimal distortion.
• Continuous Mode - Ideally suited for more steady state
signals such as a bass or guitar. The unit responds much
slower to transients and allows a smoother response.
Link – Links the two processing channels and changes the
right channel parameters to match the left. When unlinked
the right channel previous parameters are recalled. When
linked, a common summed mono side chain is enabled for
both channel 1 and 2.