Ashly nX1504 Operating Manual page 27

Operating Manual - nX, nXe, and nXp 150W/75W Power Amplifiers
Ducking At Mixer(s)
This feature is particularly useful when setting up multiple zones where only some of the output channels should be
ducked (e.g. restaurants, courtrooms, etc.). When this feature is selected, each matrix mixer is allowed to enable or disable
ducking on that particular output.
Noise Gate
A noise gate can be used to minimize unwanted, low
level ambient sounds from getting through on an individual
input channel. Threshold is the level above which an input
signal will pass through, below which its signal is attenuated
by the range value. Attack and release control the time char-
acteristics of the gating action. Attack sets the amount of time
used to ramp the gain to unity. Release sets the time required to
attenuate the signal. The gate may be assigned to a link group
to link its parameters with other channel gates.
Parameters:
Threshold - The minimum signal level required to
open the gate and allow signal to pass through, available as
text box or as the top drag node on the graph.
Range - The amount of attenuation applied to the
unwanted signal when it remains below threshold, sometimes
referred to as "floor". It is available as text box or as the bottom
drag node on the graph.
Attack - The rate at which the gate rises to unity gain
after the signal has reached threshold.
Release - The rate at which the gate applies attenua-
tion to the signal after it falls below threshold.
Advanced Mode Parameters:
Advanced Mode allows the user to specify a key
filter for the gate. A key filter does not EQ the signal passing
though the gate, but rather allows the gate threshold to respond
only to a frequency band within the signal as determined by the
filter. The key filter is a band-pass filter with selectable center
frequency and bandwidth. The key filter is only engaged when
the <Key Engaged> button is clicked.
Key Frequency - This is the center frequency of the key filter, use text box or drag the frequency node left or right.
Key Bandwidth - This is the bandwidth of the key filter, use the text box or right-click-drag the node left or right..
27