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De-Ess Listen
Press to allow monitoring of only the signals which will trigger
activation of the De-Esser rather than hearing the overall effect in a
complex signal. The LISTEN LED beside the meter illuminates to
show that ‘Listen’ mode is active.
Active LED
This LED illuminates when the De-Esser is active at the chosen
frequency, and shines brighter with increasing level reduction.
Setting up the De-Esser
Press DE-ESS LISTEN with THRESHOLD at maximum and slowly
reduce until the selected frequency begins to trigger the De-Esser.
Vary the frequency control to find the exact area of the signal
which you wish to remove. Once located, switch off DE-ESS
LISTEN and adjust THRESHOLD for the amount of reduction
required. No further adjustment of FREQUENCY should be
required, as the hot spot will have been more precisely found using
DE-ESS LISTEN.
LIMITER
Limit In
Press to activate the multi-band limiter. Three separate fixed
frequency bands with different limiting properties give true
distortion-free limiting.
Active LED
This LED illuminates when the Limiter is active. An upper threshold
is fixed at +20dBu to prevent overload of the internal (or an
external) A/D converter.
Output
Sum
Press to route both the internal signal and external line input signal
(from the “EXT I/P A/D DIRECT” rear panel jack) to the module
output. (External signals could be a double track, an extra mic from
a second ISA430 or live reverb.)
External
This control adjusts the gain of the external line input, which may
be summed into the module output (see above).
Output
A variable control adjusts the module output level (OP1) between
-60dB and +6dB.
Mute
Press to mute the output from the unit.
Stereo A/D
The ISA430 can be used as a high quality stereo converter channel
for final mastering, or for analogue transfer to digital (by adding the
optional ISA430 digital output board.) The external input, and the
line input (when BYPASS is pressed) are both fed to the A/D
inputs, via the limiter, giving a clean, protected, high quality path to
digital. Converter settings are as follows:
Clock Select
Selectable between 44.1kHz, 48kHz, 88.2kHz and 96kHz.
Bit Rate Select
Selectable between 24, 20 and 16 bits.
Ext Sync
Press to select the EXT SYNC input on the rear panel. This allows
theISA430 to be slaved to external wordclock.
Single/Split Mode Selection
The unit can be run as a single channel “Producer Pack”, or split to
act as two independent processors running discrete audio paths.
Split mode allows the INSERT SEND and INSERT RETURN
connections to act as independent inputs and outputs to the
dynamics section only, creating two devices in one, with separate
EQ and Dynamics; perfect for mix down.
Dynamics Pre Eq
Normally the EQ section is first in the signal path. Pressing PRE EQ
reverses the position of the EQ and Dynamics sections, placing
Dynamics first and EQ afterwards.
Split Dynamics
Press SPLIT DYNAMICS to separate the EQ and Dynamics
sections, creating two independent modules as shown below.
Insert In
Normally the insert is bypassed. Pressing INS IN places the insert
in the audio path in the selected position.
Insert Position
The Insert Send and Return may be positioned in three places
within the unit for maximum versatility, as shown in the diagram.
Pressing the INSERT POSITION switch steps through the three
options, as indicated on the corresponding LEDs.
The options are PRE (Insert is after the input Trim, but before EQ
or Dynamics, (depending on the setting of the DYNAMICS PRE EQ
switch)), MID (between EQ and Dynamics) or POST (after EQ and
Dynamics and before the main output).
ISA 430 Manual (multilanguage) 20/1/2000 9:06 am Page 7
