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EAW UMX.96 Owner's Manual
• RATIO control — Expander mode only. Sets the amount of gain reduction applied as the signal falls below
threshold. A gate is an expander with an infinite ratio and infinite range.
• ATTACK control — Determines how quickly the gate/expander opens once the signal is above threshold.
Short attack times allow triggering on short transients, while longer attack times cause these transients to
be ignored.
• RELEASE control — Determines how long it takes for the gain to fall to the setting of the range control
once the signal falls below threshold and the hold time (gate only) elapses.
• HOLD control — Gate mode only. Sets a fixed time that the gate remains open once the signal drops
below the threshold setting. During the hold time, the gain is held constant, whereas during the release
time, the gain is falling at the release rate. Change the gate to an expander by enabling the EXP button
in the selected channel or via the touchscreen's Dynamics tab. Only mono input channels have gates/ex-
panders.
• KEY FILTERING Section — This section allows filtering the key signal (the signal that controls the gate/ex-
pander) to make it frequency selective. Use the key high and low pass filters to make the triggering more
immune to leakage outside the frequency band of the trigger source. The key filters are both Linkwitz-Ri-
ley designs with a range of 20 Hz to 20 kHz and a slope of 12 dB/octave.
The Key In/Key Out switch enables/disables the key filter section, bringing the filters in/out of the key signal
chain.
The KEY LISTEN switch solos the channel and sends the key filter signal to the solo bus. All other solo selec-
tions are temporarily cancelled during Key Listen. Disabling Key Listen returns the console to the previous
solo state.
Edit Menu – The edit menu is described in Section 12.2.7.6.
12.2.7.2
Gate Operation and Graphic Display
The Expander/Gate has a unique display for showing the input and output signals plotted against a graph
of the gain reduction characteristic. Input level is represented along the X axis (horizontal), output level is
represented along the Y axis (vertical), the Threshold is represented by the line with the "T" at the top and
the Range is represented by the line with the "R" at the right.
Looking at the sample graph, the input signal is at –26 dBFS (represented by the green shaded area) and the
Threshold line is at –24 dBFS. Notice that when the input signal is above the threshold level, the output level
equals the input level (what goes in is what comes out). When the input signal is below the threshold level,
the output is reduced by 16 dB, which is equal to the Range setting.
Conversely, you can see that as the input level crosses threshold, the output level abruptly increases to
where the output equals the input (remember that increasing input level moves from left to right and not
from bottom to top).
12-15
Touchscreen Interface
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