Allen&Heath GR05 - Manual (Page 18)

18 GR05 User Guide
Ducking
Ducking provides an automatic voiceover or muting facility. Ducking is
triggered by a ‘priority’ signal, for example a paging microphone. The level of
the background music is reduced by a pre-determined amount when a priority
audio signal is detected. When the priority audio signal is removed the ‘ducked’
music returns to normal level. In this way simply talking into the paging
microphone automatically overrides the music. When you stop talking the
music returns smoothly to normal level.
This section describes the installer configuration of the ducking facility. Both
internal and external ducking are separately available. Internal ducking can be
triggered by the Mic1 and/or Mic2 signals. External ducking is triggered by a
remote switch. For each the depth of ducking and release time can be
assigned. Ducking can mute the signals if required. You can enable or disable
internal and/or external ducking on each of the outputs. Only signals routed
through the VCA path can be ducked. Plan carefully how the ducking facility is
to be configured before attempting to set the jumper links.
To configure the unit switch off power, remove the top cover and adjust the
jumper links as shown. Power can be re-applied to test the configuration
settings. Avoid the power supply components shown greyed out on the
diagram.
Internal Trigger Select
Decide which microphone signal should trigger ducking.
For each of the two Mic inputs set the link to M1 (M2) or
OFF as shown. One, both or none of the microphones
can trigger ducking.
Routing
Microphones assigned to trigger ducking must be
routed to the outputs via the DIRECT signal path so that
they do not attempt to duck themselves. Signals to be
ducked should be routed via the VCA path.
Output Ducking Select
For each output select whether internal ducking, external
ducking or both should apply. Set the links as shown. If
ducking is not required the link should be fitted on one
pin only as shown.
Ducking Parameters
The depth and release time can be separately set for
internal and external ducking. Depth can be set
relatively shallow (-10dB), normal (-20dB) or to turn off
the signal (MUTE). Release time is either fast or slow.
Set the links as shown.