RCF AX 8042 User manual

USER MANUAL
AX 8042 -AUTOMIXER WITH 8 AUDIO
INPUTS AND 6 AUDIO OUTPUTS

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TABLE OF CONTENTS
SAFETY PRECAUTIONS
INSTALLATION
DESCRIPTION
AUDIO INPUT BLOCK DIAGRAM
AUDIO OUTPUT BLOCK DIAGRAM
FRONT PANEL
REAR PANEL
HOW TO LINK TWO AX 8042 EACH OTHER
NOTES ABOUT THE RDNET SOFTWARE
RDNET 2 SOFTWARE INSTALLATION
START THE RDNET SOFTWARE (REL. 2.0.96.3363) VIA USB
MAIN WINDOW
preset manager
input channel settings
equalizer
compressor
automatic gain control (agc)
noise gate
digital trimmer
bm 3003 setup
automatic level control (alc)
automixer
priority function (ducking)
AUDIO OUTPUTS AND SLAVE UNIT CONTROLS
audio output settings
equalizer
limiter
MIXER MATRIX
matrix nodes
matrix bus / output levels
e-foutput links
GROUPS
control group
mute group
assignment of audio inputs and outputs to agroup
FORCE ON/OFF
audio input settings
GPI/GPO SECTION (
logic inputs and outputs, master unit only
)
logic inputs (gpin)
logic input functions
logic output (gpout)
logic output functions
REMOTE CONTROLS SECTION (
master unit only
)
generic settings
static mode settings
dynamic mode settings
combined mode
AC RDNET IN/OUT PLUG BOARD INSTALLATION
INTERNAL JUMPER SETTINGS
SPECIFICATIONS
RS 485 SERIAL PORT PROTOCOL
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IMPORTANT NOTES
Before connecting and using this product, please read this instruction manual carefully and
keep it on hand for future reference.
The manual is to be considered an integral part of this product and must accompany it
when it changes ownership as a reference for correct installation and use as well as for the
safety precautions.
RCF S.p.A. will not assume any responsibility for the incorrect installation and / or use of
this product.
WARNING: To prevent the risk of re or electric shock, never expose this product to rain
or humidity (indoor use only).
SAFETY PRECAUTIONS
1. All the precautions, in particular the safety ones, must be read with special attention, as
they provide important information.
2. POWER SUPPLY FROM MAINS
-The mains voltage is sufciently high to involve a risk of electrocution: never install or
connect this product when its power cord is plugged in.
-Before powering up, make sure that all the connections have been made correctly and
the voltage of your mains corresponds to the voltage shown on the rating plate on the
unit, if not, please contact your RCF dealer.
-The metallic parts of the unit are earthed by means of the power cord.
-An apparatus with CLASS I construction shall be connected to a mains socket outlet
with a protective earthing connection.
-Protect the power cord from damage. Make sure it is positioned in a way that it cannot
be stepped on or crushed by objects.
-To prevent the risk of electric shock, never open this product: there are no parts inside
that the user needs to access.
-The mains plug is used as the disconnect device and it shall remain readily operable.
3. Make sure that no objects or liquids can get into this product, as this may cause a short
circuit.
This apparatus shall not be exposed to dripping or splashing.
No objects lled with liquid (such as vases) and no naked sources (such as lighted candles)
shall be placed on this apparatus.
4. Never attempt to carry out any operations, modications or repairs that are not expressly
described in this manual.
Contact your authorized service centre or qualied personnel should any of the following
occur:
-The product does not function (or functions in an anomalous way).
-The power supply cord has been damaged.
-Objects or liquids have got in the unit.
-The product has been subject to a heavy impact.
5. If this product is not used for a long period, disconnect the power cord.
6. If this product begins emitting any strange odours or smoke, switch it off immediately
and disconnect the power cord.
7. Do not connect this product to any equipment or accessories not foreseen.
For suspended installation, only use the dedicated anchoring points and do not try to hang
this product by using elements that are unsuitable or not specic for this purpose.
Also check the suitability of the support surface to which the product is anchored (wall,
ceiling, structure, etc.), and the components used for attachment (screw anchors, screws,
IMPORTANT
WARNING
SAFETY PRECAUTIONS

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brackets not supplied by RCF etc.), which must guarantee the security of the system /
installation over time, also considering, for example, the mechanical vibrations normally
generated by loudspeakers.
To prevent the risk of falling equipment, do not stack multiple units of this product unless
this possibility is specied in the user manual.
8. RCF S.p.A. strongly recommends this product is only installed by professional qualied
installers (or specialised rms) who can ensure correct installation and certify it according
to the regulations in force.
The entire audio system must comply with the current standards and regulations regarding
electrical systems.
9. Supports and trolleys
The equipment should be only used on trolleys or supports, where necessary, that are
recommended by the manufacturer. The equipment / support / trolley assembly must be
moved with extreme caution. Sudden stops, excessive pushing force and uneven oors may
cause the assembly to overturn.
10. Mechanical and electrical factors need to be considered when installing a professional
audio system (in addition to those which are strictly acoustic, such as sound pressure,
angles of coverage, frequency response, etc.).
11. Hearing loss
Exposure to high sound levels can cause permanent hearing loss. The acoustic pressure
level that leads to hearing loss is different from person to person and depends on the
duration of exposure. To prevent potentially dangerous exposure to high levels of acoustic
pressure, anyone who is exposed to these levels should use adequate protection devices.
When loudspeakers capable of producing high sound levels are used, it is necessary to
wear ear plugs or protective earphones.
See the technical specications in loudspeaker instruction manuals to know their maximum
sound pressure levels.
12. Situate this product far from any heat source.
13. Never force the control elements (keys, knobs, etc. ).
14. Do not use solvents, alcohol, benzene or other volatile substances for cleaning the
external parts of this product. Use a dry cloth.
To prevent the occurrence of noise on microphone / line signal cables, use screened cables
only and avoid putting them close to:
- Equipment that produces high-intensity electromagnetic elds
- Mains cables
- Loudspeaker lines.
NOTES ABOUT AUDIO SIGNAL CABLES

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RCF S.P.A. THANKS YOU FOR PURCHASING THIS PRODUCT, WHICH HAS BEEN
DESIGNED TO GUARANTEE RELIABILITY AND HIGH PERFORMANCES.
This device can be installed into a 19” rack cabinet (1 unit) thanks to its rack ears.
INSTALLATION
AX 8042 is a highly versatile digital matrix and automixer based on a powerful DSP and
dedicated to installed sound systems and other audio applications.
It has 8 mic / line inputs on removable connectors with selectable 48 V phantom power
(each input from 5 to 8 has a single RCA socket) and 4 outputs (A to D, on removable screw
terminals) directly linked to the matrix audio buses, plus 2 additional outputs (E – F, on
RCA sockets) that can be separately processed and combined to any of the rst 4 (A to D).
Sound processing includes parametric equalizers, noise-gates, compressors, limiters, delays,
ducking, automatic level and gain controls, priority functions, levels and gains on all cross-
points.
All parameters can be edited through a dedicated RDNET software module.
Each AX 8042 can work as a dual-room combiner with 2 independent ‘automix’ settings.
AX 8042 has 10 logic inputs (GPIN), 4 logic outputs (GPOUT) plus 2 (RL1, RL2) with a relay.
All logic inputs and outputs have removable screw terminals and are fully congurable.
Two AX 8042 (MASTER and SLAVE) can be linked each other to get a 16-input 8-output
matrix (plus 4 additional outputs) through RJ 45 digital ports on their rear panels.
Up to four TS 9918 remote controls can be connected to the MASTER AX 8042.
A slot on rear panel allows to integrate an optional RCF RDNET module to get remote
control through RDNET network.
Up to twelve BM 3003 paging microphones (linked in daisy-chain on the same line) can be
connected to the dedicated RJ 45 port, which can be used in alternative to input 1.
Each of the three BM 3003 buttons can be congured to page one or more zones (audio
outputs).
All paging microphones are interlocked one another and report in-use and busy indications.
MAIN FEATURES
-digital 8-input 4-output (plus 2 additional outputs) matrix and automixer.
-40-bit oating point DSP, sampling frequency: 48 kHz, 24-bit a/d d/a converters.
-8 mic / line balanced audio inputs with 48 V ‘Phantom’ power, with noise gates,
compressors, parametric equalizers, automatic gain controls, ducking function.
-4 line balanced audio outputs with level controls, parametric equalizers, delays, limiters.
-2 additional line (unbalanced) audio outputs with level controls, parametric equalizers,
delays, limiters, each linkable to one of the rst 4 outputs.
-10 programmable logic inputs (GPIN).
DESCRIPTION

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-4 programmable logic outputs (GPOUT) plus 2 with relay (RL1, RL2).
-Dual-room combiner with 2 independent ‘automix’ settings.
-16-input 8-output matrix (plus 4 additional outputs) by linking together two AX 8042.
-Congurable ALC (‘Automatic Level Control’) when a noise detection microphone is
connected to the input no.8 .
-Either USB link (standard) or RDNET link (through an optional module).
-Port for dedicated RCF TS 9918 remote controls.
AUDIO INPUT BLOCK DIAGRAM

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AUDIO OUTPUT BLOCK DIAGRAM
1INPUTS LEDs: each LED indicates the signal presence (green) / peak (red) at its
respective audio input.
2OUTPUTS LEDs: each LED indicates the signal presence (green) / peak (red) at its
respective audio output.
3CTRL/COMM LED: it blinks when receiving control data.
1 3 54 6 7 82
FRONT PANEL

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4GPI/O LED: when lit, it indicates the activation of at least a logic input / output.
5ON LED: when lit, it indicates the AX 8042 automixer is properly powered and
operating.
6ERR/FAULT LED: when lit, it indicates a fault or data transmission / reception errors.
7MASTER/LINK LED: when lit, the AX 8042 automixer is the MASTER unit, otherwise
(if the LED is off) it is set to SLAVE.
8HOST: USB (type B) port to link a computer (PC) locally.
REAR PANEL
9PAGING CONSOLE (input 1): audio input with RJ 45 socket (alternative to the
input 1 with removable connector 10 ) for a line made of max. 12 RCF BM 3003 paging
microphones linked in 'daisy-chain' (read the BM 3003 user manual).
10 AUDIO INPUTS 1 to 8: balanced line level inputs for removable connectors.
Pins:
+Audio signal, hot
–Audio signal, cold
GND Ground
21 15 1422
19 17 16
20 18
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12 11 10 9

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13 AUDIO OUTPUTS E and F: unbalanced line level outputs with RCA sockets.
14 EXTENSION LINK IN: input to link the EXTENSION LINK OUT of the second AX
8042 (optional). Read the manual section 'How to link two AX 8042 each other'.
15 EXTENSION LINK OUT: output to link the EXTENSION LINK IN of the second AX
8042 (optional). Read the manual section 'How to link two AX 8042 each other'.
16 GPIN 1 ÷ 10 'Generic Purpose Inputs' (removable connectors)
Logic inputs that can be activated by other device commands.
Each logic input can be set via software. It can be activated when its two pins (for
example, '1' and its respective ground GND) are either shorted or open.
17 GPOUT 1 ÷ 4 'Generic Purpose Outputs' (removable connectors)
Logic outputs that can be set via software.
note: logic outputs cannot be used to power other devices (i.e. relays).
output voltage can be either 5 v (high) or 0 (low).
18 24 VDC output (two positive 24 V dc pins and two ground pins)
24 V dc output (for removable connectors) available to power other devices
(max. current: 0.2 A).
19 RL2 logic output with relay (removable connector) that can be set via software.
Max. current on contacts: 0.5A. Max. applicable voltage: 24 V dc.
20 RL1 logic output with relay (removable connector) normally assigned to the device
fault indication. To enable its user software control, it is necessary to set the JMP1
internal jumper (see the respective manual section).
Max. current on contacts: 0.5A. Max. applicable voltage: 24 V dc.
11 AUDIO INPUTS 5 to 8: (alternative to those for removable connectors 10 ),
unbalanced line level inputs with RCA sockets.
12 AUDIO OUTPUTS A to D: balanced line level outputs for removable connectors.
Pins:
+Audio signal, hot
–Audio signal, cold
GND Ground

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HOW TO LINK TWO AX 8042 EACH OTHER
EXTENSION LINK
EXTENSION LINK
FROM / TO AX 8042
FROM / TO AX 8042
OUT
OUT
AX 8042 (1)
AX 8042 (2)
IN
IN
GND Ground
PNon-inverting pin (RS 485 A)
NInverting pin (RS 485 B)
V24 V dc
22 Input for the power cord (to be connected to mains through an earthed socket only).
The RDNET software is protected by international copyright laws and is to be used to
congure the RCF RDNET system only.
It is not allowed to modify or change or try to decompile this software.
In no event shall RCF S.p.A. be liable to end-users for any damage whatsoever, including
but not limited to nancial damages for loss of business prots or business information
due to the software use or inability to use this product.
The foregoing provision is effective even if RCF S.p.A. has been advised of the possibility
of such damages.
Even if the SOFTWARE has any material, veriable and reproducible program errors, RCF
S.p.A. shall have no obligation to modify such errors.
NOTES ABOUT THE RDNET SOFTWARE
Two AX 8042 can be linked each other to get a 16-input 8-output matrix
(plus 4 additional outputs) through the EXTENSION LINK ports (RJ 45 sockets)
on their rear panels.
Connect the EXTENSION LINK OUT 15 output of the rst AX 8042 to the
EXTENSION LINK IN 14 input of the second AX 8042 and vice-versa.
thetwo cables must bescreened(sFtp or cat6) and not longer than20 cm
(about 8 inches).
when using the pc software (read the respective manual section), in the global
setting window, set the first ax 8042 to master and the second ax 8042 to
slave (note: this setting needs to be carried out in two stages with separate usb
connection, first one ax 8042, then the other).
21 REM-CTRL RS 485 port for RCF TS 9918 remote controls (removable connector).
It is possible to link up to four TS 9918 remote controls, of which the rst shall have its
digital address set '0', the second set to '1', the third set to '2', the fourth set to '3'.

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RDNET 2 SOFTWARE INSTALLATION
Read the license agreement.
Click ‘I Agree’ to accept and proceed with the software installation.
It is now possible to change the installation folder (directory) of the RDNET
software (or keep the default path).
Click INSTALL to proceed.
Minimum requirement: a PC with Microsoft 'Windows®
XP', 'Vista' or '7' operating system, having an available USB
port. The operating system shall also have the drivers for the
emulation of the serial RS 232 interface via the USB port.
Before installing a new software release, it is necessary to
remove the previous version (if installed). Verify also that the
new release is the right one for the PC operating system: either
32-bit or 64-bit.
Run rcf_rdnetsetup_(release).exe to start the setup wizard.
Click NEXT > to proceed.

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As soon as the installation ends, it will be necessary to reboot your computer.
Choose either ‘Reboot Now’ to reboot immediately or ‘I want to reboot
later” to reboot later manually.
Click FINISH to quit.
note: the pc operating system shall also have the drivers for the
emulation of the serial rs 232 interface via the usb port.
Link (through a suitable cable) the computer USB port to the one of
the AX 8042 automixer (labelled HOST 8).
Run the RDNET software (in Windows, click):
Start > Programs > RCF > RDNet > RDNet
(or double-click RDNet icon on the desktop).
In the main menu, click ‘Advanced’ and then ‘Com Setup..’
to open the serial port setting window.
START THE RDNET SOFTWARE (REL. 2.0.96.3363) VIA USB
If the connection is already active (the button label is ‘Disconnect’), do not change
anything.
Only if the connection is not active:
- Select the right serial Port (the one with RS 232 emulation via USB) of the used computer,
for instance ‘COM 7’.
- Do not change the other parameters (‘Parity’, ‘Stop Bits’, ‘Handshake’).
- Click ‘Connect’ to start the connection. In the bottom left-hand corner of the main
window (in the bottom bar) should appear ‘Connected’.

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MAIN WINDOW
In the main menu, now click ‘Quickstart’: in the bottom right-hand corner of the main
window (in the bottom bar) the word ‘OFFLINE’ becomes ‘ONLINE’.
The AX 8042 module now appears.
Point the PC mouse at the AX 8042 module and double-click
(or right-click and select ‘Show Obj Details’) to open the automixer
setting window.
To upgrade the AX 8048 rmware
(main menu: “Advanced > Firmware Upgrade...”), refer to the RDNET 2
user manual.
It includes the 8 MASTER INPUTS and the 6
MASTER OUTPUTS of the MASTER unit (the
rst or the only AX 8042); the SLAVE INPUTS
and SLAVE buttons (to manage the SLAVE unit,
which is the second optional AX 8042) are
initially disabled.
First, click UNIT SETTINGS (in the main
window) to open the ‘Global settings’ window.

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UNIT CONFIG
Select either MASTER if the AX 8042 currently linked to the PC is the MASTER unit (or
the only one) or SLAVE if the AX 8042 currently linked to the PC is the SLAVE unit.
Important: when two AX 8042 are linked each other (MASTER and SLAVE),
this settings shall be carried out (in two stages) on both units, by linking the USB
cable to the rst unit, then to the second unit.
After every change, click SAVE and then turn the AX 8042 off (unplug its power
cord) and turn it on again.
If there is a SLAVE unit, rst turn the MASTER unit on (then the SLAVE).
LINK CONFIG
Select either MASTER ONLY if there is a single AX 8042 or MASTER + SLAVE for two
AX 8042 linked each other.
The MASTER + SLAVE setting enables all SLAVE unit software controls.
SYSTEM CONFIG CONTROL
Click SAVE to save the current software conguration to AX 8042.
The conguration includes the MASTER / SLAVE settings, the initial PRESET, audio input
settings (e.g. PHANTOM power, phase, MIC/LINE settings, digital trimmers), logic inputs
and outputs, all labels, remote controls and groups.
Click LOAD to load (into the software) the conguration previously saved to AX 8042.
UNITS RESET
Click RESET to reset all AX 8042 automixers.
BACK RS485 PORT SETUP
Select REMOTE CONTROL (default) to use RCF TS 9918 remote controls linked to the
RS 485 serial port 21 or (alternatively) AMX/CRESTON IN for other remote controls as
(for instance) AMX®/CRESTON® (via custom software not supplied by RCF).
PRESET MANAGER
It is possible to store and recall up to 16 different presets.
Click UNIT SETTINGS (in the main window) to open the ‘Global settings’
window, which includes the preset manager.
SAVE: saves the current settings to the selected preset (chosen from 1 to 16 in
the PRESET list).
A NAME (text box) can be given to each preset.
RECALL: recalls the selected preset (previously saved).
Warning: save current settings to a preset before recalling
another one (otherwise all current settings will be lost)!
STARTUP CONFIG
It allows to choose which preset will be loaded as rst after AX 8042 start-up:
- SPECIFIC PRESET, the one chosen in the SELECTED PRESET list.
- LAST SAVED, the last saved preset (in chronological order).
PRESET MANAGER

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INPUT CHANNEL SETTINGS
Each audio input has a level bar 1, from –60 to 0 dB.
0 dB is the peak level before distortion.
All input controls are here listed:
EDIT 2opens or closes the setting window of the equalizer, the compressor, the
automatic gain control (AGC), the noise gate and the digital trimmer.
The INPUT 1 also includes all settings for BM 3003 paging microphone.
NSGT 3toggles the noise gate (automatic channel opening only if its signal exceeds
the predetermined threshold).
The noise gate must be kept on when automixer and / or ‘ducking’ functions are used.
To access its parameters, click EDIT 2and select the INPUT DSP window.
CMP 4toggles the compressor.
To access its parameters, click EDIT 2and select the INPUT DSP window.
EQ 5toggles the parametric equalizer.
To access its parameters, click EDIT 2and select the EQ window.
AGC 6toggles the automatic gain control.
To access its parameters, click EDIT 2and select the INPUT DSP window.
PRIORITY 7: priority level setting from 0 (lowest) to 5 (highest) for the ‘ducking’
function (automatic level attenuation of one or more audio inputs when a signal is
detected at the input with the highest priority level).
Between 2 (or more ) inputs having the same same priority level, the one with the lowest
channel number gets the priority.
INPUT (n) 8: audio input label that can be edited after a double-click on the text.
MUTE 9: (when lit) mutes the audio input.
SOLO 10 : (when lit) open the selected input only (and mutes all the others).
11 Audio input level control. The level can be adjusted by moving the fader (by keeping
it with the mouse left button) or directly changing its value (above the fader: click the
number and then insert the new value with the numeric keyboard).
Click INPUTS SETUP (in the main window) to edit other input options.
PH48V: toggles the Phantom power
(48 V) in its respective input.
Phantom is usually needed by electret
microphones.
Warning: never turn Phantom
power on when not necessary
(i.e. for LINE level signal from CD
/ MP3 players, dynamic microphones) or
the used cables is unbalanced.
PH.SHIFT:
(when lit) inverts the signal phase.
Do not turn this option on (but particular needs).
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1
INPUT CHANNEL
SETTING

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Click MIC to turn back to LINE.
LINE: changes the input sensitivity from LINE (for signals coming from other mixers,
CD / MP3 players, etc.) to MIC (microphones that are not pre-amplified).
After clicking LINE, choose ‘Yes’ on the confirmation request.
It is possible to set up to 3 independent lters (Filter 1, 2, 3).
Enabled: click the checkbox to toggle each lter.
Move the mouse on its white background (making it green) to highlight a lter (if
present) on the EQ graph.
Type:
-DISABLED: the lter is disabled (by-pass).
-PEQ: parametric equalizer that allows to adjust the level at the settable centre frequency
and specify the Q factor (the adjusted level can be widened or narrowed).
-SHELVING_HIGH: increase or decrease the level of all frequencies above the selected
frequency by the specied amount.
-SHELVING_LOW: increase or decrease the level of all frequencies below the selected
frequency by the specied amount.
-Filter no.1 (only) also includes these options (high-pass): BUTTERWORTH, LINKWITZ-
RILEY, ELLIPTIC, BESSEL.
EQUALIZER
Click EDIT to open the EQ setting window (of its respective audio input).
EQUALIZER

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Slope: lter slope setting (dB / oct).
Q: Q factor setting.
Gain (dB): lter gain setting.
Freq (Hz): either lter frequency selection or PEQ central frequency setting.
File Commands:
-SAVE: it saves to PC the current equalization as .rde le.
-LOAD: it loads from PC an equalization previously saved as .rde le.
Eq. options:
-FLATTEN: it disables all lters (at frequency response).
-BYPASS EQ.: it disables the equalization, but without changing lter settings.
-PHASE PLOT: if selected, the phase plot is shown (green line).
Devices commands:
-STORE: it sends and stores the equalization to AX 8042.
-SEND: it sends (without storing) the equalization to AX 8042.
For each lter, frequency and gain can be adjusted either graphically (through the mouse)
by dragging the little coloured square or in an analytical way (by inserting the values in
the cells or rotating the control).
The overall equalization is shown as a red line, the intervention of the selected lter as a
green line, the intervention of a lter that is not selected as a white line.
For example, to apply a 12 dB attenuation for frequencies below 80 Hz: enable the lter
1 by clicking its ‘Enabled’ checkbox, select the SHELVING_LOW lter type, set the gain to
–12 dB and frequency to 80 Hz.

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To add a second lter (i.e. PEQ): enable the lter 2, select the PEQ lter type, its gain and
central frequency, then set its Q factor.
Finally, click either STORE (send and store) or SEND (send without storing) to send all EQ
settings to AX 8042.
COMPRESSOR
The compressor does not modify a signal having a level lower than the predetermined
threshold and compresses a signal with higher level.
To access its parameters (of a single input), click EDIT on the respective channel and
select the INPUT DSP window.
THRESHOLD and RATIO values can be adjusted either by moving the respective faders or
dragging (with the mouse) the red points in the graph.
THRESHOLD: adjusts the level above which the compressor compresses the signal.
OUT GAIN: adjusts the output gain (useful to minimize the signal attenuation due to
compression).
Attack: adjusts the compressor attack time.
Release: adjusts the compressor release time.
Ratio: sets the ratio between the original signal (above the threshold) and the
compressor output.
For example: if ratio is 2:1, a signal that exceeds the threshold of 2 dB will be compressed
to 1 dB (above the threshold).
Indicatively: 2:1 ratio is suitable for voice, from 2:1 to 4:1 for musical instruments.
A compressor having a ratio higher than 10:1 operates as a limiter.
A 1:1 ratio is an invalid setting, as it does not compress at all.
Enable: toggles the compressor (keep it on when using).
COMPRESSOR

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USE EXAMPLE:
1. Set THRESHOLD to a level lower than 0 dB (e.g. –15 dB).
2. Set RATIO (i.e. 4:1).
3. Adjust OUT GAIN in order to increase the signal output gain (to minimize the
compressor attenuation, i.e. +10 dB).
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AUTOMATIC GAIN CONTROL (AGC)
The automatic gain control does not modify a signal having a level lower than the
predetermined threshold, but increases or reduces a signal above the threshold to
get the desired average level (‘target’), within the set time and according to the
compression/expansion ratio.
To access AGC parameters (of a single input), click EDIT on the respective channel
and select the INPUT DSP window.
THRESHOLD: adjusts the level above which the AGC operates.
TARGET: adjusts the optimal average signal level to be obtained.
Time: adjusts the AGC intervention time.
Ratio: sets the ratio between the original signal (above the threshold) and the AGC
output.
Use a ratio in the 1.5 ÷ 3 range, in order to avoid excessive compression / expansion,
which may lead to too low or distorted output signals.
A 1:1 ratio is an invalid setting, as the AGC does not operates at all.
Enable: toggles the AGC (keep it on when using).
AUTOMATIC GAIN CONTROL (AGC)