THRESHOLD
– Variable hysteresis is incorporated in the Threshold circuitry. For any given ‘open’ setting, the
Expander/Gate will have a lower ‘close’ threshold to prevent ‘hunting’ artifacts. The hysteresis value is
automatically increased as the Threshold is lowered. This is very useful in music recording as it allows
instruments to decay below the open threshold before gating or expansion takes place.
REL/HOLD
– This determines the time constant (speed), variable from 0.1- 4 seconds, at which the
Gate/Expander reduces the signal level once it has passed below the threshold. Note that this control interacts
with the Range control. This control also incorporates a switch which, when pushed, provides a fast attack time
(100µs per 40db), instead of the normal linear attack time of 1.5ms per 40dB. The attack time is the time taken
for the Expander/Gate to ‘recover’ once the signal level is above the threshold. When gating signals with a
steep rising edge, such as drums, a slow attack may effectively mask the initial THWACK, so you should be
aware of this when selecting the appropriate attack time.
HOLD
– When this button is pressed, the release time is fixed at 150ms but the hold time can be varied
between 0 and 4 seconds by adjusting the
REL/HOLD
pot.
The
LINK
button in the compressor section links the sidechain signal of that unit to the sidechain of the next
dynamics section to the right. When two dynamics sections are linked, the control voltages of each section sum
together, so that whichever section has the most gain reduction will control the other section.
Don’t try to link two gates using the
LINK
button when you want the signal on one to open the other. If you
need to achieve this effect, take a keying signal from one section to trigger the other. The easiest way to do this
is by patching from the insert send of the ‘source’ channel into the Key input (see below) of the ‘destination’
channel, and selecting the
KEY
button on this channel.
The
KEY
button feeds whatever signal is present on a channel’s Key input (D-connector) into the sidechain
input of that channel’s dynamics section. Pressing
S/Ch LSTN
routes the sidechain signal to the console’s PFL
bus. This simplifies the set up when either an external key input or the filters to side chain option is in use.
POST EQ
(not surprisingly) places the dynamics section post the EQ section (see also
Central Dynamics
Control
below.
Note that when the dynamics section is not in circuit, its sidechain input is also bypassed.
Signal processing order is graphically displayed on the channel TFT screen
Console Operator’s Guide
2 - 6
Duality Operator’s Manual
