6
DRAWMER
DSL424 O
PERATOR’S
M
ANUA
L
L.F.
25Hz - 10kHz
The Low Frequency filter works by severely attenuating frequencies below the cut-off frequency
selected.
H.F.
200Hz - 35kHz
The High Frequency filter attenuates frequencies above the selected cut-off value. In other words,
when both filters are set, it is the range between the two settings that is allowed to pass.
Ext/Int
In the
INT
position, this switch causes the gate to respond to the dynamics of the signal being
processed.
In the
EXT
position, an external audio signal fed to the key input is used to control the gate, making
it possible to gate one sound using another, independent signal.
Gating
This button selects between the Hard and Soft modes of operation. In the Hard mode, the DSL424
Hard/Soft
behaves as a fast, conventional gate while in Soft mode, it performs as a programme adaptive
expander. Hard mode is signified by a red status LED while the Soft mode is identified by a yellow
LED. If two channels are linked, the mode is determined by the master (left) channel and the
Hard/Soft LEDs on the slave channel will extinguish.
Master Link
When the link button is depressed, the gate 2 channel on the right is controlled by the gate 1 left
hand channel. In linked mode, the red status LED beneath the Slave Link switch will be illuminated,
and both the yellow and red HARD/SOFT LEDs of the slave channel will be extinguished. This
assists to show that the only controls of the slave channel that still function are the Key Listen /
Gate / Bypass switch and the Range switch.
The Noise Gate Channels
cont...
Both compressor channels of the DSL424 are identical and may be used completely independently or linked for stereo
operation. In the linked mode, only the left hand channel (compressor 1) controls are functional and serve as master
controls, though the channel bypass switches remain independent. In linked mode, the compressor/limiters and peak
limiters of the two linked channels track together to avoid the inevitable image shifting that occurs if the two channels of
a stereo signal are treated independently.
Compressor
Threshold
Determines the input level above which gain reduction will be applied and may be set in the range
-40 to +20dB. When Soft Knee compression is selected, the onset of compression is progressive
over an input range of approximately 15dB, above which level conventional ratio compression is
applied. For this reason, the signal level may appear to fall when the compressor is switched from
Hard to Soft Knee operation and some readjustment of the threshold setting may be required.
Knee
Selects Hard or Soft Knee operation. In general, the Soft Knee mode provides the least obtrusive
Hard/Soft
gain control and is often the preferred setting when treating finished mixes.
The Compressor/Limiter Channels
