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Doc Q7.0
Gate/Expander [GTE]
5.14
The downward
Expander
module is sort of a “reverse compressor” that increases the difference between loud
sounds and soft sounds by lowering the volume of soft sounds even further. When set up to completely silence
incoming signals below a certain threshold, the expander is called a
gate
.
The Gate/Expander block supports X/Y Switching on the XL/XL+ only. See p.
for more information.
Each Axe-Fx II preset can use two fully independent Gate/Expander blocks.
Figure 5-15 – The Gate/Expander Block
THRSH
– (Threshold) Sets the level below which automatic volume reduction will occur. When input level is
lower than the threshold, the expander reduces output volume as set by the RATIO.
RATIO
– Sets the gain expansion ratio to determine how greatly signals below the threshold will be reduced.
For example, when a ratio of “2” is chosen, for every dB the input signal falls below the threshold, the output
signal will drop by 2 dB.
ATT
– Attack time. Sets how quickly the Gate/Expander restores the gain once the threshold is exceeded.
REL
– Release time. Sets how quickly the Gate/Expander reduces the gain once the signal has fallen below the
threshold.
HOLD
– Sets how long the Gate/Expander holds the gate open once the threshold has been exceeded.
SCSEL
– Selects the sidechain input source. NONE is the normal setting and selects the block input (sum of
the rows feeding the block) as the sidechain source. The other settings allow isolating a single row or main
input as the sidechain input. The other rows are summed as usual. By using a row or main input as the
sidechain input, you can use the
Gate/Expander
as a ducker or de-esser. You can also choose either of the
main inputs as sidechain sources, i.e. Input 1 or Input 2.
LOWCUT/LOCUT
– These sets the frequency of low- and hi-pass filters on the sidechain input. The filters
only shape the signal feeding the detector. They do not affect the tone of the signal at the outputs.
Mix Parameters
The
Gate/Expander
block has
LEVEL
,
BALANCE,
and
BYPASS MODE
parameters, detailed on p.
