25
5 Select Enable to apply the settings to the selected channel.
Table 11. Compressor Settings
Enable Enables or disables the compressor DSP effect for this
ch
annel.
Threshold Sets the threshold level, which is the point where the
si
gnal activates the compressor circuit.
The range is -135 to +21 dB.
Attack Sets how quickly or slowly compression will be applied
to
the signal once the audio signal goes above the
threshold level. It specifies the length of time over which
the compression ratio will gradually increase from no
compression to full compression.
The range is 1 to 500 ms.
Hold Sets how long compression will be applied after the sig-
nal has fallen below the threshold.
The range is 1 to 500 ms.
Decay Sets how quickly or slowly compression will be removed
f
r
om the signal after the signal has dropped below the
threshold
and the Hold interval has expired. It specifies
th
e length of time over which the compression ratio will
gradually decrease from full compression to no com
-
pression.
The range is 0 to 2000 ms.
Knee Sets how far below the threshold compression will begin
t
o
be gradually applied to the signal. A very low value,
kn
own as a hard knee, immediately applies full compres-
sion once the threshold is reached. A high value, known
a
s
a soft knee, will gradually start applying compression
be
fore the signal reaches the threshold, not reaching
the full effect until the threshold is reached, thereby
“rounding off” the compression effect. Increasing the
knee level decreases the obvious transition from the
uncompressed to the compressed sound.
The range is 1 to 100 dB.
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