LA Audio G400 - Manual (Page 6)

Page 6
2.5 EXT. KEY led
EXT. KEY lights when a jack is plugged into the side chain insert on the rear of
the G400.
2.6 THRESHOLD control
THRESHOLD sets the reference level at which the gate will open and allow audio
through to the output. Control range is -50dBu to +20dB.
The side chain on the G400 has been designed with 'auto-level-sensing' and Hold
circuitry to ensure that both fast transient and low frequency signals operate the
gate without false triggering and/or chatter. However if the gate repeatedly opens
and closes on a particular signal, reducing the THRESHOLD level can often
correct this.
2.7 ABOVE-BELOW leds
These two leds indicate the relationship between the side chain signal (which is
normally the same as the input signal unless the side chain insert is used) and
the THRESHOLD setting.
The BELOW led indicates that the signal level is below threshold and the gate is
closed. In practise, when the BELOW led lights the audio starts to fade at a rate
set by the RELEASE control.
The ABOVE led indicates that signal levels are above threshold and the gate is
open. When the gates closes, the ABOVE led starts to fade at a rate set by the
RELEASE setting.
2.8 ATTACK switch
Two switchable ATTACK rates are available on the G400 -
SLOW provides an attack speed which is suitable for most program material
without introducing transient clicks.
FAST is intended for gating percussive instruments or signals with fast attacks
transients.