Wohler iAM-AUDIO-1 PLUS User manual

iAM-AUDIO-1 PLUS
1RU Multi-Channel Audio Monitor
User Guide
Part Number 821809-1, Revision A

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Last Update
August 13, 2021

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TABLE OF CO TE TS
Table of Contents
User Guide ........................................................................................ 1
TABL OF CONT NTS .......................................................................... 3
Table of Contents ........................................................................................... 3
CHAPT R 1: Installation....................................................................... 6
Introduction .................................................................................................. 6
Overview ............................................................................................ 6
Safety .......................................................................................................... 6
Instructions ......................................................................................... 6
Safety Symbols.................................................................................... 7
Mounting............................................................................................. 7
Heat Dissipation ................................................................................... 7
Sympathetic Vibration........................................................................... 8
Mechanical Bracing ............................................................................... 8
lectrical Interference ........................................................................... 8
Power ................................................................................................. 8
Compliance ................................................................................................... 8
FCC.................................................................................................... 8
IC S-003 ............................................................................................ 8
CHAPT R 2: Local Operation................................................................. 9
Operation...................................................................................................... 9
Startup......................................................................................................... 9
Front Panel.................................................................................................... 9
Rear Panel................................................................................................... 11
SFP-2022-6 / SFP-2110 Address Setup............................................................ 15
Channel Meters and Touch Operations............................................................. 16
Dolby Zoom Screen ...................................................................................... 17
Menu / Option Touchscreen ........................................................................... 19
Main Menu ........................................................................................ 20
Loudness Menu .................................................................................. 20
Loudness Meter.................................................................................. 20
Loudness Settings .............................................................................. 22
Source Select .................................................................................... 24
Presets ............................................................................................. 26
All Presets ......................................................................................... 26
Preset Favorites ................................................................................. 28
Unit Settings ..................................................................................... 29
Speaker Options................................................................................. 30
Meter Scales...................................................................................... 31
Unit Configuration .............................................................................. 33
Phase Configuration............................................................................ 34
System Options Menu ......................................................................... 35
Network Settings................................................................................ 35
System Reboot .................................................................................. 37

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System Update .................................................................................. 38
Factory Reset .................................................................................... 39
System Information............................................................................ 40
CHAPT R 3: Technical Info ............................................................... 41
CHAPT R 4: The iAM-AUDIO-1 PLUS Web GUI ...................................... 46
Web Browser / Control Device........................................................................ 46
First Time IP Assignments ............................................................................. 46
Peer-to-Peer Connection...................................................................... 46
Network Connection............................................................................ 47
Network Setup............................................................................................. 48
Dashboard .................................................................................................. 49
Audio Meters ............................................................................................... 53
System Preferences...................................................................................... 54
Loudness Configuration Tab ................................................................. 54
Phase Indicator Configuration Tab......................................................... 55
Preset Management...................................................................................... 56
Dolby Presets .............................................................................................. 61
Output Routing ............................................................................................ 62
Destination Outputs............................................................................ 62
Source Inputs .................................................................................... 63
Output Options .................................................................................. 64
Typical Questions Regarding Output Routing .................................................... 64
What signal outputs can be controlled using the Output Routing feature? ... 64
How do the outputs behave if I do not purchase OPT-OUTPUT-ROUTING
license? ............................................................................................ 64
What is the difference between Global Output Routing and Output Routing in
Presets?............................................................................................ 65
How do I route whatever is being monitored to the XLR and A S outputs?.. 65
How do I have a downmixed pre-fade output on A S Pair-1 combined with a
post-fade output on the Analog XLRs? ................................................... 65
How do I make the XLR outputs follow the Audio Meter screen solos & mutes
while the A S Pair-1 does not? ............................................................. 66
How do I route only specific monitored channels to the Analog XLR outputs?
....................................................................................................... 67
The optional Global Output Routing feature works great. But what if we don't
want to create any Presets and want to monitor audio only using Source
Select? How would I configure different outputs for Source Select choices?. 67
How do I keep the internal speakers muted and have audio only on the
analog XLR outputs? ........................................................................... 67
How do I ensure that the outputs are automatically muted when the
Headphone jack is inserted?................................................................. 68
What are AoIP-Pair 9 and AoIP Pair 10?................................................. 68
How do I ensure that my outputs are pre-faded but follow the solo-mutes on
the web interface? This will allow us to monitor only the unmuted/solo Audio
Meter channels on amplified stereo speakers connected to the Analog XLR’s.
....................................................................................................... 69
Preset Replication......................................................................................... 69
System....................................................................................................... 71
System Information............................................................................ 71
SFP Information ................................................................................. 72
Licenses............................................................................................ 73
Factory Reset .............................................................................................. 74

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Reboot System ............................................................................................ 75
APP NDIX A: Software Upgrades......................................................... 76
Introduction ................................................................................................ 76
Download the Software ................................................................................. 76
Update Methods........................................................................................... 76
Local Update from the Front Panel .................................................................. 77
Updating via the Web GUI using a Flash Drive .................................................. 79
Updating an iAM-AUDIO-1 PLUS Remotely ....................................................... 81
Updating Multiple Units Remotely ................................................................... 83
APP NDIX B: Dante Network Setup ..................................................... 86
Introduction ................................................................................................ 86
What is in the iAM-AUDIO-1 PLUS for Dante? ................................................... 87
DanteTM Device Setup ................................................................................... 88
Dante Clock Selection ................................................................................... 89
Channel Names............................................................................................ 89
A S67 ........................................................................................................ 90
Device Lock................................................................................................. 92
Dante Firmware Upgrades ............................................................................. 93
Additional Information .................................................................................. 93
DanteTM Legal Disclosures.............................................................................. 93
APP NDIX D: Ravenna (ZMAN) Setup .................................................. 94
Introduction ................................................................................................ 94
What is in the iAM-AUDIO-1 PLUS for Ravenna?................................................ 94
RAV NNA-Compatible Talker/Listener.................................................... 94
AVB thernet Features ........................................................................ 94
Configuring the AOIP Merging Option Card....................................................... 95
Getting Started | General Settings ........................................................ 96
Getting Started | PTP .......................................................................... 97
Getting Started | Session Sources......................................................... 98
Getting Started | Session Sinks ............................................................ 99
Getting Started | Session Info .............................................................100
Getting Started | Ins/Outs ..................................................................101
Getting Started | I/O Router ...............................................................101
Operation: .................................................................................................102
Connecting Remote Source to Local Sink ..............................................102
ZMAN Session Sinks ..........................................................................102
ZMAN Session Sources.......................................................................104
ZMAN Updating.................................................................................104
APP NDIX : API Documentation .......................................................105
Introduction ...............................................................................................105
API: Presets ...............................................................................................105

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CHAPTER 1: Installation
Introduction
Overview
The iAM-AUDIO-1 PLUS is a 1RU multichannel multi-source audio monitor with basic
3G-SDI and analog inputs. It may also be purchased with a large variety of other
inputs or these may be added later at the need arises. Refer to the Specifications
section of this manual or contact Wohler Sales for more information.
The iAM-AUDIO-1 PLUS is compact and simple to operate, with straightforward
controls. It has a touch screen LCD display providing high resolution level meters.
Any audio channels (or channel pairs) from any audio/video source stream may be
monitored. ither 8 or 16 channel meters can be displayed.
The iAM-AUDIO-1 PLUS includes two 3G SDI inputs and it can monitor audio from
them. Optional modules will allow decoding of an additional SDI input, MADI, A S3,
Dolby D, DD+, , SMPT 2110, SMPT 2022-6, and A S streams. It contains APIs
for remote management.
Setups are created and configured using local menus and a web browser over a
network connection to the integral web server of the iAM-AUDIO-1 PLUS. The web
server will also allow you to view the audio meters remotely.
Safety
Instructions
1. Read, keep, and follow all of these instructions; heed all warnings.
2. Do not use this equipment near water.
3. Use only a dry cloth to clean the equipment.
4. Do not block any ventilation openings.
5. Do not install near any heat source such as a radiator, heat register, amplifier, or
stove.
6. Do not attempt to plug the unit into a two-blade outlet (with only two prongs of
equal width).
7. Protect the power cord from being walked on or pinched, particularly at plug
connection on the equipment and at the socket.
8. Use only the attachments/accessories specified by the manufacturer.
9. Unplug the equipment during lightning storms or when unused for long periods
of time.
Important:
By design, the supplied AC mains power cord will only plug into a
three-prong grounded outlet for your safety. If the plug does not fit
into the outlet, contact an electrician to replace the obsolete outlet.

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10. Refer all servicing to qualified service personnel. Servicing will be required
under all of the following conditions:
a. The equipment has been damaged in any way, such as when the power-
supply cord or plug is damaged.
b. Liquid had been spilled or objects have fallen onto the equipment.
c. The equipment has been exposed to rain or moisture.
d. The equipment does not operate normally.
e. The equipment has been dropped.
Safety Symbols
Mounting
The unit is designed for a standard 19" rack. Install it at ear/eye level for best high
frequency response and visual observation of the display screens. Please adhere to
the following clearances:
Table 1-1: Clearance Recommendations
Clearance Surface
24” Front
3” Rear
2” Sides
1.75” Top and Bottom (if either radiates heat)
0” Top and Bottom (if no heat)
Heat Dissipation
The ambient temperature inside the mounting enclosure should not exceed 40°
Celsius (104° Fahrenheit). Adjacent devices can be rack mounted (or stacked) in
proximity to the unit if this temperature is not exceeded. Otherwise, allow a 1RU
(1.75”/44.45mm) space above and below the unit for air circulation.
Important
:
Heat generated by the class D power amplifiers, power supplies,
and other components is vented by slots in the sides and back of
the unit. Therefore, as a safety precaution, you must allow proper
ventilation on these surfaces.
WAR I G:
The symbol to the left warns of electric shock hazard inside the unit.
Disconnect the power cord before removing access panels when
installing upgrades. Only qualified service personnel are to operate
the equipment with covers removed, and are to exercise caution to
avoid personal injury.

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Sympathetic Vibration
Sympathetic vibration from other equipment (cables, etc.) in the rack may be
serious enough to interfere with the unit’s sound quality. If you experience
sympathetic vibrations, use thin card stock, felt, foam, or weather-stripping
between the vibrating surfaces. Tie loose cables securely with cable ties.
Mechanical Bracing
The 1RU chassis is securely attached to the front panel. In addition, the chassis has
mounting tabs through which you attach it to the rack rail. This feature will reduce
or eliminate rear bracing requirements in many mobile/portable applications. The
weight of internal components is distributed fairly evenly around the unit.
lectrical Interference
Be careful to avoid mismatched cable types and other similar causes of undesired
reflections in digital signal systems. If severe enough, such reflections can result in
corruption of the digital data stream. As with any audio equipment, maximum
immunity from electrical interference requires the use of shielded cable; however,
satisfactory results can sometimes be obtained without it. The internal circuitry
ground is connected to the chassis.
Power
The unit connects to an AC mains power source (100 to 240 VAC, 65W, 50/60Hz)
using an I C power cord.
When the mains plug or appliance coupler is used as the disconnect device, the
disconnect device should remain operable.
Compliance
FCC
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful
interference, in which case the user will be required to correct the interference at
their own expense.
IC S-003
This Class A digital apparatus complies with Canadian IC S-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du
Canada.

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CHAPTER 2: Local Operation
Operation
The iAM-AUDIO-1 PLUS can be operated easily and simply from controls on its front
panel, as described in this chapter. It may be accessed remotely in two ways, via
the Wohler Web GUI for administrative purposes or by third party equipment via
Application Programming Interface (API) commands. The Wohler Web GUI is
described in Chapter 4 of this manual. The API commands are described in
Appendix of this manual.
Startup
The iAM-AUDIO-1 PLUS will begin its startup process when it is connected to power.
There is no power switch. It is normal for the product to require about 45 seconds
to start up and be ready to use.
When the iAM-AUDIO-1 PLUS completes its startup, the Status indicator will turn
green. Depending upon optional settings, all channel pairs will either be in the
muted condition or set in a predetermined way. You may then use the Source and
Channel controls to enable only the program channels you want to hear.
Front Panel
The front panel is shown in Figure 2-1.
Figure 2–1: iAM-AUDIO-1 PLUS Front Panel
1. Audio Level Meters: Two 2.4" LCD screens allow monitoring of audio with high
resolution bar graph meters of up to 16 channels.
2. Loudness: A third 2.4" LCD screen allows monitoring of Loudness of selected
channels.
3. Speakers: Local near field audio monitoring is achieved through the use of class D
amplifiers. There are two (left/right) speakers. The speaker response may be
adjusted with tone controls in the Speaker Options menu. Refer to the Menu /
Option Touchscreen section of Chapter 2.

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4. Headphone Jack: A 1/4" jack for an optional headphone is provided on the front
panel. Speaker audio will be muted when headphones are plugged in. If the
Output Routing option is installed, speaker audio may optionally be set to not
mute, using the Wohler Web GUI. Refer to the Output Options section of Chapter
4. If the speaker audio is set to mute with headphone insertion, and a headphone is
plugged into the Headphone Jack, the following icon will appear at the top of the
Audio Meter Display:
5. Volume: This controls the speakers, the headphone, and the analog outputs. As
the Volume control is turned, a graphic appears at the top of the Audio Meter
Display screen, as follows:
Pressing the Volume control mutes the audio and a speaker muted icon appears at
the top the Audio Meter Display: This icon also displays whenever the
Volume control is turned all the way counterclockwise.
6. Balance: This controls the relative left/right levels for the monitored stereo mix.
Pressing the knob will bring the balance back to center. It controls the speakers,
the headphone, and the analog outputs. As the Balance control is turned, a
graphic appears at the top of the Audio Meter Display as follows:
7. Source: Turning this control right or left selects between the available licensed
input sources. The selected Source input is displayed at the top of the Audio Meter
screen as follows:
Alternatively, the Source control can be used to select from any Preset, or from
any Favorite Preset. Refer to the Source Knob Select setting in the Unit Config
menu. Regardless of this menu setting, when the Loudness Meter Screen is
displayed, the Source knob selects which Loudness Cluster is to be measured and
monitored.
8. Channel: Turning this control moves a white selection box from channel to channel
on the metering screens. Press the control to solo the highlighted channel. The box
will turn blue and any other boxes will disappear. To remove the solo and return to
the previous monitoring configuration, press the Channel control once again.
9. USB: This USB 2.0 Type A connector allows you to use a flash drive (not supplied)
to perform software updates and copy system configurations to another iAM-
AUDIO-1 PLUS or to a PC. Refer to Appendix A of this manual to learn about
performing a software update.
10. Status: This indicator lights green when the system is powered and ready for use.
A solid or blinking yellow color indicates that the product is starting up. A red color
indicates that a system update is taking place. Refer to Appendix A for procedures
to update software.

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Rear Panel
The rear panel is shown in Figure 2-2.
Figure 2-2: iAM-AUDIO-1 PLUS Rear Panel Layout
Power Connection: The iAM-AUDIO-1 PLUS receives power from an AC inlet, which is a
standard I C receptacle for 100 to 240 VAC ±10%, 50/60 Hz power connection. Four
regional AC power cords, supplied according to shipping region, are available.
1. SDI Inputs: These two BNC connectors accept the two 3G/HD/SD-SDI
input signals containing audio to be monitored. This is a standard feature.
2. SDI Output: This BNC connector outputs the selected 3G/HD/SD-SDI or
SFP module input signal.
3. etwork Port: This thernet port can connect to either a LAN or to a PC
to let you perform administrative tasks remotely. The Wohler Web GUI is
described in Chapter 4 of this manual. Third party equipment, connecting to
the iAM-AUDIO-1 PLUS via a LAN plugged into this port and using an API
commands, can view and change product options, as well. This API is
described in Appendix of this manual.
4. MADI B C: (optional) The COAX input accepts an A S10 64-channel
signal at 48 kHz sample rate. An optional license key must be purchased to
enable this function. The COAX output is reclocked from the MADI source.
When power to the iAM-AUDIO-1 PLUS is not present, the COAX input and
output are automatically connected together to allow the MADI signal to
pass through. A software license must be installed for this input to
function. Refer to the System Setup section in Chapter 4 to install
software licenses.
Important:
By design, the supplied AC mains power cord will only plug into a
three-prong grounded outlet for your safety. If the plug does not fit
into the outlet, contact an electrician to replace the obsolete outlet.

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5. MADI Fiber SFP: (optional) This input module accepts an optical A S10
64-channel MADI input signal at 48 kHz sample rate. An optional license
key must be purchased to enable this function. A software license must be
installed for SFP ports to function. Refer to the System Setup section in
Chapter 4 to install software licenses.
6. AES Inputs: (optional) This HD-15F connector accepts 4 A S3id digital
audio pairs (8 channels) at a 48 kHz sample rate. Refer to Figure 2-3 for
the pinout of this connector. The easiest way to interface with this
connector is to use an HD-15 to VGA adaptor cable. Channels are selected
as A S 1-8. A software license must be installed for these inputs to
function. Refer to the System Setup section in Chapter 4 to install
software licenses.
Figure 2-3: A S HD-15F Connector Pinout
12345
678910
1112131415
AES Pairs
1234
7. AES Outputs: This HD-15F connector provides 4 A S3id digital audio
pairs (8 channels) at a 48 kHz sample rate from selected monitored
sources. Refer to Figure 2-3 for the pinout of this connector. The easiest
way to interface with this connector is to use an HD-15 to VGA adaptor
cable. These outputs are not controlled by the Volume and Balance
controls. Monitored channels 1 and 2 are sent from A S-1, channels 3 and
4 are sent from A S-2, channels 5 and 6 are sent from A S-3, and
channels 7 and 8 are sent from A S-4.
8. SFP Module Cage: An SFP cage is provided to accept one optional SFP
module compatible with SDI coaxial or optical signals. The SFP modules
are hot swappable for convenience. An optional license key must be
purchased to enable each module. A software license must be installed for
the SFP port to function. Refer to the System Setup section in Chapter 4
to install software licenses. The following SFP modules are offered:
a. 3G/HD/SD-SDI Single Video Receiver with Active Loopback:
This uses HD-BNC connectors.
b. 3G/HD/SD-SDI Video SFP with Optical Input: This uses LC
fiber connectors. It is a Single-Mode Receiver, Medium Haul, Non-
MSA, and no output.
c. SMTPE 2022-6 Receiver: This uses Multi-Mode 850 NM, LC fiber
connectors. It allows the iAM-AUDIO-1 PLUS to monitor SDI audio

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transmitted in real time over thernet. You must use the emS T
configuration software to set up this option. It is available from
Wohler Technologies Technical Service.
d. SMTPE 2110 Receiver: This uses Multi-Mode 850 NM, LC fiber
connectors. It allows the iAM-AUDIO-1 PLUS to monitor SDI audio
transmitted in real time over thernet. You must use the emS T
configuration software to set up this option. It is available from
Wohler Technologies Technical Service.
e. SMTPE 2110 or 2022-6 Receiver: This uses Multi-Mode 850 NM,
LC fiber connectors. It allows the iAM-AUDIO-1 PLUS to monitor
SDI audio transmitted in real time over thernet. You must use the
emS T configuration software to set up this option. It is available
from Wohler Technologies Technical Service.
9. Analog Inputs: These female XLR connectors provide two balanced
analog inputs: Left and Right. The Analog Inputs are standard on the
iAM-AUDIO-1 PLUS. Refer to Figure 2-4 for the pinout of this connector.
Figure 2-4: Analog XLR-F Output Connections
10. Analog Outputs: These male XLR connectors provide two balanced
analog outputs: Left and Right. The source of these signals is the mix of
audio as monitored by the internal speakers and is adjusted by the
Volume and Balance controls. The Analog Outputs are standard on the
iAM-AUDIO-1 PLUS. Refer to Figure 2-5 for the pinout of this connector.

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Figure 2-5: Analog XLR-M Output Connections
11. Option Card Slot: This metal plate can be removed to reveal a location
in which future optional modules can be installed.
12. TOSLI K Optical Input (optional): This connector is located on the
panel of the optional OPT-iVAM ANALOG Option card, as well as on the
panel of the AoIP Option card. It provides an optical stereo pair input.
13. Balanced Analog DB-25 Outputs (optional): This DB-25 female
connector outputs 8 channels of +10dBu broadcast level balanced audio.
This connector is located on the panel of the optional OPT-iVAM ANALOG
Option card. The source of these signals is the monitored audio channels
as shown on meters 1 - 8. Tascam cables may be used, and can be
purchased by contacting Wohler Sales. Refer to Figure 2-6 for the pinout
of this connector.
ote: PCM channels marked as data channels (such as those containing
encoded Dolby streams) are automatically muted from being sent out to the
external amplifier and speakers.
ote: When these outputs are used to connect to an external amplifier and
speakers, the external amplifier should be muted whenever the iAM-AUDIO-1
PLUS is being powered up or powered down.
14. Balanced Analog DB-25 Inputs (optional): This DB-25 female
connector inputs 8 channels of up to +10dBu broadcast level balanced
audio. This connector is located on the panel of the optional OPT-iVAM
ANALOG Option card. These signals are monitored on meters 1 - 8 by
default. Tascam cables may be used, and can be purchased by contacting
Wohler Sales. Refer to Figure 2-6 for the pinout of this connector.

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Figure 2-6: Analog DB-25F Input and Output Connections
12345678910111213
141516171819202122232425
GG
GG
GGGG
N/C
L R L R L R L R
Pair 1 Pair 2 Pair 3 Pair 4
15. AoIP SFP Module Cage (optional): This provides a location in which to
insert the AoIP Module supplied with the OPT-DANT (iVAM) and OPT
RAV NNA 64 options.
16. Primary / Secondary 1GB E ET (optional): Primary and Secondary
Gigabit thernet interfaces are provided with the AoIP option module.
SFP-2022-6 / SFP-2110 Address Setup
While the optional SFP-2022-6 and SFP-2110 modules monitor program audio
created from distinctly different technologies, both are connected to the network in
the same way and have the same requirements for addressing. Figure 2-7
illustrates the network connections they need.
Figure 2-7: SFP-2022-6 and SFP2110 Network Diagram
Ethernet Networ & Switch
Broadcast Equipment
Throughout the Facility
iAM-AUDIO-1 PLUS with SFP-2022-6 / SFP-2110
PC
Fiber
Optic
192.168.39.217
192.168.39.215
The optional SFP-2022-6 or SFP-2110 module furnished by Wohler Technologies is
manufactured by mbrionix and comes from the factory with a default IP address.
To integrate it into your digital network, you need to set its address to the source to
be monitored. You must use the emS T configuration software to set up this option.

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It is available from Wohler Technologies Technical Service. The procedure to
accomplish this is described in the SFP-2022-6 / SFP-2110 Setup Guide (part
number 821822), which is available at ftp://ftp.wohler.com/Download-from-
Wohler/DoNotDelete/ mset
Channel Meters and Touch Operations
The audio mixer terminology of “solo” is used in this manual when referring to
muting all but a specific audio channel or pair.
Audio meters are displayed on touchscreen LCD display(s) in up to 8 channel pairs,
as shown in Figure 2-8.
Figure 2-8: Audio Level Meter Screens
-00
-60
-40
-30
-20 -20
-30
-40
-60
-00
S
t
u
d
i
o
A
56 34 12
-00
-60
-40
-30
-20 -20
-30
-40
-60
-00
S
t
e
r
e
o
A
S
t
u
d
i
o
B
16
15
14
13
10
9S
t
e
r
e
o
B
12
11
Channel Identifiers
Channel / Cluster / Loudness Touch Selection Area
87
SDI-1
Loudness Reading
Loudness Cluster Marker
LKFS-M : -20.5
1. Channel Identifiers: Above the level meters are the Channel Identifiers.
They indicate the consecutive channel numbers in the selected source.
An arrow pointing to the left indicated that this is a left channel and
will be monitored in the left speaker.
An arrow pointing to the right indicated that this is a left channel and
will be monitored in the right speaker.
A square indicates that this is a center channel and will be monitored
in both speakers.
The symbol shown on channels 7 and 8 in Figure 2-8 indicates
that this channel pair is a Dolby bitstream. Refer to the Dolby
Zoom section of this chapter.
2. Loudness Cluster Marker: This orange bracket marks which cluster is
currently being measured for Loudness.
1
2
3
87

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3. Loudness Reading: This control displays the Loudness of the selected
Cluster. It can also be touched to change which Cluster is being
measured. To do this, touch the green Loudness Reading control. It will
temporarily turn orange. You may then touch the meters in any other
cluster. The Loudness Cluster Marker will then move to that cluster and
its measurement will begin and be displayed. You may then touch the
control again to return it to its green color, restoring normal touch
functioning, or wait 15 seconds for it to time out.
4. Channel/Cluster/Loudness Selection Area: Touching the meters of
any channel pair will let you mute, un-mute, or solo the associated
channel(s). Colored boxes surrounding the channel pair or channel
indicate what operation is being performed. The following describes each
function:
a. Mute / Un-Mute Selection: A violet box surrounds any channel
pair that is muted. Typically, when the iAM-AUDIO-1 PLUS is first
powered, all of the channel pairs are muted. Touching a muted
channel pair un-mutes it and removes the violet box. Muting and
un-muting by touching is an alternate action function.
b. Solo Selector: Touch for two seconds any channel pair you would
like to solo. A blue box will then surround the pair and that will be
the only pair you hear. Any violet boxes will disappear. Touching
another channel pair will then move the blue box to it, and it will be
soloed. Touch again to return the combination of monitored channel
pairs to the way they were before you soloed the pair.
c. Channel Solo: Rotating the Channel control will move a white
selection box from channel to channel. Press the Channel control
to solo the selected channel. That channel alone will then be
surrounded by a blue box and it will become the only channel being
monitored. Press the Channel control again or touch anywhere on
the meters to undo the solo and return the combination of
monitored channel pairs to as it was before you soloed the channel.
5. Phase Indicators: At the bottom of each channel pair is a Phase
Indicator. The indicators light a dull green if the channels in the pair are
in phase or bright red if they are out of phase. Set which Phase Indicators
appear using the Phase Config Menu or with the System Preferences:
Phase Indicator Configuration tab in the Wohler Web GUI.
Dolby Zoom Screen
Dolby Zoom is a very powerful analysis tool. Much as a camera lens can "zoom"
into a single subject of interest out of many, the Dolby Zoom feature lets you
quickly "zoom" into a single Dolby bitstream, out of multiple encoded Dolby
streams and other channels. You can immediately listen to and meter the contained
audio channels, as well as view the Dolby metadata. Bitstreams are shown
distinctively along with the normal metering channels, as shown in Figure 2-8. The
Dolby Zoom screens are shown in Figure 2-9.

Page 18
Dolby decoding is an optional feature requiring the OPT-DOLBY module. It
allows decoding and monitoring of Dolby® D, DD+, & streams. Refer to the
System Setup section in Chapter 4 to install software licenses.
Figure 2-9: Dolby Zoom Screens
Metadata ScrollDolby MetadataChannel Touch Selection Area
-00
-60
-40
-30
-20
Dolby Mode
-20
-30
-40
-60
-00
-20
-30
-40
-60
-00 D
o
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5
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L R C LFE Ls Rs
Dolby Program
There are no programs.
SDI-1 – (Pair : 4) Exit DolbyDolby Digital Plus
Stream Type
Dolby Digital Plus
Data Rate ( bps)
384
No. of Programs(s)
1
Sample Rate ( Hz)
48
Bloc s per Frame Code
Metadata ScrollDolby MetadataChannel Touch Selection Area
-00
-60
-40
-30
-20 -20
-30
-40
-00
-20
-30
-40
-60
-00 P
1
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C C C C C C C C L R
Dolby Program Exit DolbyDolby E
All Programs Program - 1
<- <<- ->> ->
1 of 2
Dolby Mode
Program - 2
SDI-1 – (Pair : 4)
Stream Type
Dolby E
Program Configuration
8x1
Frame Rate
29.97 fps
Original Frame Rate
29.97 fps
No. of Program/s
Program - 4
Program - 3
Program - 5
-60
P
2
M
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3
M
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M
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When the Dolby Zoom screen appears, the speakers will automatically begin
monitoring the downmix audio. As shown in the figure above, SDI-1 – (Pair : 4)
indicates that the meter bar graphs and metadata are derived from the Dolby
bitstream on the fourth pair of input SDI-1. However, you may solo or mute the
individual channels for troubleshooting or other purposes. Use the left screen to
select other Dolby channels to be monitored. Touch and slide the control on the
Dolby Metadata screen to scroll through multiple lines of metadata.
A wide range of Metadata is available, which can help you diagnose possible
problems. It will vary according to the type of Dolby signal. For example, for
checking Guard Band, the iAM-AUDIO-1 PLUS will display the Line Position of each
Dolby bitstream in the Dolby signal.
Touching the Exit Dolby button returns you to the monitoring screen from which
you came.

Page 19
Menu / Option Touchscreen
You may set most options or view a variety of system information using the self-
contained menus. To access this, touch the Menu button which appears on the
right of the level meter screen. Figure 2-10 is a diagram of the menu arrangement,
a tree showing how to reach any menu from the Main Menu. Hold the Source
knob pressed for two seconds to access the Main Menu. Figure 2-11 shows the
Main Menu.
Figure 2-10: Menu Tree
System Options
Loudness Menu
System Details
Screen
Main Menu
Loudness Menu
Preset Favorites
Unit Settings
Spea er Options
Screen
Networ Settings
Screen
Factory Reset
Screen
Source Selection
Screen
Unit Settings
Spea er Options
Unit Configuration
Meter Scales
System Update
Screen
System Reboot
Screen
System Options
System Details
Unit Configuration
Screen
Networ Settings
System Reboot
System Update
Factory Reset
Meter Scales
Screen
Phase Configuration
Screen
Phase Configuration
Source Select
All Presets
Loudness Meter
Screen
Loudness Settings
Screen
Loudness Meter
Loudness Settings
All Presets
Selection Screen
Preset Favorites
Selection Screen

Page 20
Main Menu
Hold the Source knob pressed for two seconds to access the Main Menu. The
Main Menu is shown in Figure 2-11.
Figure 2-11: Main Menu
Loudness Menu
Touch the Loudness Menu button to reach the Loudness Menu Screen, which allows
you to make a selection of either the Loudness Meter Screen or the Loudness
Settings Screen. The Loudness Menu Screen is shown in Figure 2-12.
Figure 2-12: Loudness Menu Screen
Loudness Meter
Touch the Loudness Meter button on the Loudness Menu screen to reach the
Loudness Meter Screen. The Loudness Meter Screen is a more detailed view of the
Loudness Measurement. It is displayed along with the channel meter screens and is
shown in Figure 2-13.
As shown in Figure 2-13, the Source knob is positioned to the lower left of the
Loudness Meter Screen. If the Source Knob Select setting in the Unit Config
menu is set to Cluster Select, then rotating the Source knob will adjust the