Izotope ANR-B User Manual
ANR-B
Adaptive Realtime Noise Reduction
USER’S GUIDE
ABOUT IZOTOPE ANR-B
Thank you for purchasing iZotope ANR-B Adaptive Realtime Noise Reduction. ANR-B is the first product
of its kind—it features advanced new algorithms that can recognize noise and suppress it in realtime.
ANR-B is designed to clean up call-ins, on-location interviews, noisy studio feeds and any audio source
that suffers from broadband noise, tonal noise and phone line artifacts. We believe that ANR-B will
change the way you work by taking care of the tedious process of noise removal for you, without requiring
constant input.
Before you set up ANR-B in your studio, please take a few moments to read through this User’s Guide.
Once you master the basic concepts of ANR-B’s operation, we think you’ll be amazed at how simple it is
to use.
Sincerely,
The iZotope ANR-B Development Team
TABLE OF CONTENTS
IZOTOPE ANR-B OVERVIEW..............................................................................1
SETTING UP ANR-B ............................................................................................2
Connectivity.....................................................................................................2
Signal Chain....................................................................................................3
Input Level.......................................................................................................3
Number of Sources ......................................................................................... 3
ANR-B BASIC CONCEPTS..................................................................................4
Types of Noise ANR-B Suppresses................................................................4
Channels.........................................................................................................4
The Suppression Knob....................................................................................4
Noise Reduction Modes..................................................................................4
Adapt Mode.........................................................................................4
Manual Mode (Adapt Mode Disabled).................................................5
Training ANR-B...............................................................................................5
Metering .......................................................................................................... 6
Bypass and Residual Controls........................................................................6
ANR-B MENUS AND OPTIONS ........................................................................... 7
The Setup Menu..............................................................................................7
Select Audio I/O ..................................................................................7
Route Residual....................................................................................7
Brightness ...........................................................................................7
Configure Ethernet ..............................................................................8
Clear Memory......................................................................................8
Reset Hardware ..................................................................................8
Status..................................................................................................8
Update Firmware.................................................................................8
ANR-B Preset System.....................................................................................9
Loading a Preset.................................................................................9
Creating a Preset ................................................................................9
Clearing a Preset...............................................................................10
Set Filters..........................................................................................10
OTHER INFORMATION .....................................................................................10
Firmware Updates and Recovery..................................................................10
ANR-B TIPS AND FREQUENTLY ASKED QUESTIONS................................... 11
WARRANTY AND REGISTRATION INFORMATION......................................... 12
FCC NOTICE......................................................................................................14
iZotope ANR-B Overview
1. Link – when enabled, channels 1 and 2 work together as a stereo pair, when disabled,
each channel can be controlled independently
2. Channel Buttons – When selected, this button allows you to edit/view parameters for its
respective channel in the main display
3. Setup – Pressing this button allows you to edit I/O configuration and other settings
4. Display – Displays information about the channels (suppression lev el, preset name, etc)
and setup menu information
5. Data Wheel – Allows you to scroll through presets, menu items and parameters; by
pushing the wheel, it also acts as an “Enter” button
6. Preset – Allows you to save and manage your presets
7. Enter – Used to confirm menu items, parameters and preset selections
8. Channel Controls – When channels are linked, adjusting one channel’s controls will
automatically change the other channel’s controls
9. Adapt Button – Enables Adapt Mode. When enabled, ANR-B will automatically detect the
noise profile of incoming audio
10. Train Button – Lets you capture a single noise profile from a noise-only input signal
11. Suppression Knob – Controls the amount of noise removed. Lower settings remove less
noise, higher settings are more aggressive
12. Bypass Button – Bypasses the noise reduction algorithm to allow you to A/B the
unprocessed and processed signals
13. Residual Button – Holding this momentary switch will let you hear what the noise
reduction algorithm is removing
14. Input/Output Meters – Shows the level of audio going into and out of the noise reduction
process
15. Suppression Meter – Shows the amount of noise suppression being applied to the audio
signal (reads downward)
16. Power – Power switch and standard three-prong power cable socket
17. LAN – Provides Ethernet connectivity to a computer host for updating firmware and other
remote features
18. RS-422 Port – Provides the same functionality as ANR-B’s LAN port
19. DARS – Digital Audio Reference Signal input (AES black) for syncing ANR-B to a master
reference clock
20. AES/EBU – Digital XLR input/output
21. Analog Inputs/Outputs – Balanced XLR input and output pair
iZotope ANR-B™ User’s Guide 1
SETTING UP ANR-B
Connectivity
ANR-B features both analog and digital inputs and output options. You can manually switch between
analog and digital modes using the Setup Menu. By default, ANR-B will automatically detect which input
source is receiving a signal.
Analog XLR - Analog audio can be sent to and from ANR-B using balanced XLR inputs and outputs.
When using analog inputs and outputs, ANR-B internally processes at a fixed 48kHz sample rate.
NOTE: The analog section of ANR-B is designed to have 0dB (unity) gain and h andle levels up to
+24dBU 34.7V peak to peak, 12.28V rms.
Digital AES/EBU - ANR-B includes digital AES/EBU input and output (2 channels).
NOTE: When using AES/EBU for your primary input and output you may simultaneously use the analog
XLR outputs to monitor residual noise. Read the Setup Menu section for more details.
LAN and RS-422 - These connections allow firmware updates and control information to be sent to ANR-
B. Contact iZotope Support for more information. (support@izotope.com)
Digital Clock Sync
When using digital I/O, ANR-B’s sample rate will sync to the incoming digital audio signal or to a clock
signal connected to the DARS connection. In order to ensure sync throughout your studio setup you
should use one of these two synchronization methods:
AES Sync - ANR-B will automatically sync to information provided by the digital input signal, no further
settings need to be made in the ANR-B unit to ensure that it is correctly synced. However, be sure that a
device before ANR-B in the signal chain is set to be the master clock and that all devices following ANR-B
in the signal chain are set to sync to incoming digital audio. If these other devices are set to ignore
incoming sync information and use their internal clocks, you may hear sync artifacts like clicks and pops.
DARS (AES Black) – If your studio has a master clock, connect this to ANR-B’s DARS input, and sync all
other audio equipment in the signal chain to this master clock. This will ensure proper sync is maintained.
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ANR-B has internal jumpers for studio and consumer levels. Please contact iZotope support for more information.
iZotope ANR-B™ User’s Guide 2
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