Hall Research Technologies HD-AUD-IO User manual

User’s Manual
HD-AUD-IO
HDMI 2.0 Audio Inserter & Extractor
Order toll-free in the U.S. 800-959-6439
FREE technical support, Call 714-641-6607 or fax [phone]
Mail order: Hall Research, 1163 Warner Ave. Tustin, CA 92780
Web site: www.hallresearch.com E-mail: [email protected]
CUSTOMER
SUPPORT
INFORMATION
UMA1278 Rev NC

HD-AUD-IO
2
© Copyright 2019 Hall Research, Inc.
Table of Contents
1.0 Introduction .................................................................................3
Features .................................................................................................4
2.0 Package Contents ........................................................................4
3.0 Setup ..............................................................................................5
Installation .............................................................................................5
4.0 Connector and Indicator Functions.........................................6
5.0 RS-232 commands ......................................................................8
6.0 Windows Graphical User Interface........................................10
7.0 Troubleshooting........................................................................13
Contacting Hall Research....................................................................14
8.0 Specifications.............................................................................14

HDMI 2.0 Audio Inserter & Extractor
© Copyright 2019 Hall Research, Inc. 3
1.0 Introduction
The Hall Research HD-AUD-IO is an all-in-one HDMI audio manager capable of
extracting audio from (de-embedding) and inserting audio into (embedding) an
HDMI video signal. The product also provides EDID management features.
The product provides one HDMI input with a corresponding HDMI output. The
HDMI input audio signal simultaneously extracts to both 2-channel L/R analog
and Digital SPDIF (TOSLINK).
The product provides two audio inputs (analog and digital). Users can select
which audio to embed in the HDMI output. It can be the same as the original
HDMI audio (pass-thru), SPDIF digital, or 3.5mm L/R analog.
Advanced EDID management allows users to control the video portion as well
as the audio part of the EDID. The EDID presented to the video source
connected to the HDMI input can pass from the downstream device or emulate
an EDID from internal memory. The device can also “Learn” the EDID connected
to its HDMI output.
The product has a video bandwidth of 18 Gbps and supports resolutions up to
4K @ 60 Hz 4:4:4 with HDR. It supports HDCP 2.2 as well as HDCP 1.4 if needed.
The device has the ability to generate and output a blank HDMI signal with
audio embedded even if there is no HDMI input; often referred to as “HDMI
Audio Bridging”. This is a convenient means to distribute audio only signals
over an HDMI network.
The HD-AUD-IO has a configurable digital input terminal that can mute the
audio and/or video.
Typical Connection Diagram

HD-AUD-IO
4© Copyright 2019 Hall Research, Inc.
Features
•Supports 4K/60 4:4:4, HDR, HDCP 2.2 & 1.4
•18 Gbps bandwidth for compatibility with both HDMI 1.4 and 2.0b
•Supports multi-channel digital and 2-channel analog audio
•Extracts both LR analog and digital audio embedded in the HDMI input
•Embeds either LR analog or digital audio into the HDMI output
•Generates HDMI output with embedded audio with no HDMI input
•EDID management
•Can pass-thru or emulate EDID
•RS-232 controllable
•Configurable digital input for muting audio and/or video
2.0 Package Contents
HD-AUD-IO
(1) Model HD-AUD-IO
(2) Rack mounting brackets
(1) 4 position terminal block
(1) 5 Volt power supply with locking connector
(4) Power supply plug universal adapters
(1) Web documentation card

HDMI 2.0 Audio Inserter & Extractor
© Copyright 2019 Hall Research, Inc. 5
3.0 Setup
Installation
•Optionally, connect an HDMI source to the HDMI IN connector. Note that
a source is NOT required to embed audio onto the HDMI output. If there is
no HDMI source signal, the HDMI Output will be a 640x480 black screen.
•Optionally, connect an HDMI compatible sink to the HDMI OUT connector.
A sink is not required to extract the HDMI Input Audio.
•Optionally, connect the SPDIF OUT audio output to a compatible audio
device.
•Optionally, connect the L/R OUT analog audio output to a compatible
device (e.g., headphones, assistive listening devices).
•Optionally, connect the audio to embed to the SPDIF IN and/or L/R IN
connector(s).
•Optionally, Connect the TX, RX and GND contacts on the Control terminal
strip to a compatible controller (e.g., PC or RS-232 controller).
•Optionally, Connect the DI contact on the Control terminal strip to a
compatible normally open dry contact. This can be configured to mute the
audio and/or video. Factory default is to mute the audio output. (Closed =
MUTE)
•Optionally, use the included rack mount brackets and hardware. The
brackets are configurable for different mounting orientations.
•Connect the included power supply to the 5V DC connector.

HD-AUD-IO
6© Copyright 2019 Hall Research, Inc.
4.0 Connector and Indicator Functions
1) Mini-USB Port
a. Used by Windows GUI and to update system firmware.
2) CONTROL Terminal Strip -
a. RX, GND and TX - RS-232 Port
i. Connect to an external RS-232 controller to control the
HD-AUD-IO.
b. Digital Input
i. Connect to an external control for system output muting
control based on the configured 'Digital Input Action'.
3) HDMI IN
a. Connect to a compatible HDMI Source
4) EXTRACTED AUDIO - SPDIF Out
a. Connect to other compatible digital audio equipment.
5) EXTRACTED AUDIO - L/R Out
a. Connect to other compatible line-level audio equipment.
6) 5V DC
a. Connect to the included power supply.
#2
#1 #3 #4 #5 #6

HDMI 2.0 Audio Inserter & Extractor
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7) AUDIO TO EMBED - L/R IN
a. Connect to compatible line-level audio source
8) AUDIO to EMBED - SPDIF IN
a. Connect to compatible digital audio source
9) HDMI OUT
a. Connect to a compatible HDMI SINK
10) EMBED SOURCE Button and LEDs
a. L/R - Audio on HDMI OUT connector comes from L/R IN connector
b. SPDIF - Audio on HDMI OUT connector comes from SPDIF IN
connector
c. Pass - Audio on HDMI OUT connector comes from HDMI IN
connector
11) AUDIO EDID Button and LEDs
a. 2 CH - Alters EDID to include only 2CH audio settings
b. Multi- Alters EDID to include only Mult-Channel audio settings
c. Pass - Pass EDID to source from SINK
12) VIDEO EDID Button
a. Single button press - Toggle between EMULATED and PASSTHRU
EDID modes
b. 1 Blink - HOLD FOR 3 SECS - LEARN EDID
c. 2 Blinks -HOLD FOR 7 SECS - FACTORY DEFAULT
13) VIDEO EDID LED
a. OFF = PASS-THRU EDID
b. ON = EMULATED EDID
c. This LED blinks when VIDEO EDID button is pressed AND HELD to
show function selected when button is released.
#7 #8 #9 #10 #11 #13#12

HD-AUD-IO
8© Copyright 2019 Hall Research, Inc.
14) EDID Handling
a. With no SINK attached to the HDMI OUT connector, the EDID
presented to the SOURCE will be emulated from the current EDID
stored in the system.
5.0 RS-232 commands
•The following table lists the available RS-232 commands:
oA single carriage return character (hex 0x0D) terminates each command.
oInvalid input, space and linefeed characters (hex 0x0A) are ignored.
•RS-232 communication on the RS-232 terminal strip is:
o115200 bps, 8 Bit, No Parity, 1 Stop bit.
•<CR> symbols in the table below refer to a single carriage
return character (0x0D)
•“Invalid Command” is sent in response to invalid RS-232
commands
•Other possible responses
o"ERR1" - Internal I2C error
o"ERR2" - TX HPD read error
o"ERR3" - Chip Signature error
Command Response Function and Example
FW FWx.y<CR> Returns the firmware version.
FW1.1<CR> -- X and Y represent the firmware version numbers. (V1.1)
CVx CVx<CR> Sets/Returns the current HDMI Output video status
CV?<CR> -- Returns the current HDMI Output video status
CV1<CR> -- HDMI Output video is ON
CV0<CR> -- HDMI Output video is OFF
DI DIx<CR> Returns Digital Input Status
DI1<CR> -- Digital Input terminal is not grounded.
DI0<CR> -- Digital Input terminal is grounded.
DIAx DIAx<CR> Sets/Returns Digital Input Action
DIA?<CR> – Returns current Digital Input Action
DIA3<CR> -- HDMI Output Audio is muted when digital input is grounded. (Factory
Default)
Where 'x' is one of the following:
0 -- No Action
1 -- Mute HDMI Output Video and Audio
2 -- Mute HDMI Output Video
3 -- Mute HDMI Output Audio
4 -- Mute Both External SPDIF and L/R Outputs
5 -- Mute External LR Output
6 -- Mute External SPDIF Output
ES
x
ESx<CR> Sets/Returns the current EDID setting
ES?<CR> -- Returns the current EDID setting
ES1<CR>-- Pass-Thru EDID (Factory Default)
ES0<CR> -- Emulated EDID
EL EL OK<CR>
EL ERR<CR>
Learns the connected SINK to the selected EDID (LR or Multi)
EL OK<CR> -- The EDID learning process was completed
EL ERR<CR> -- The EDID learning process was not completed.
Failures can occur from:
No SINK attached
Attempting to learn while in EMULATED EDID mode
Attempting to learn while in AUDIO EDID Pass-Thru mode
FD FD<CR> Resets device to Factory Defaults
Unit will reboot

HDMI 2.0 Audio Inserter & Extractor
© Copyright 2019 Hall Research, Inc. 9
Command Response Function and Example
HDI HDIx<CR> Returns HDMI Input HDCP status
HDI?<CR> -- Returns the current HDMI Input HDCP Status
HDI2<CR> -- HDMI Input is HDCP 2.2 encrypted
HDI1<CR> -- HDMI Input is HDCP 1.4 encrypted
HDI0<CR> -- HDMI Input is not encrypted
HDOx HDOx<CR> Returns the HDMI Output HDCP Mode
HDO?<CR> – Returns the current HDMI Output Mode
HI HIx<CR> Returns HDMI Input +5V Status.
HI1<CR> -- Source +5V connected.
HI0<CR> -- Source +5V disconnected.
HO HOx Returns HDMI Output HPD Status.
HO1<CR> -- Sink HPD connected.
HO0<CR> -- Sink HPD disconnected.
IAx IAx<CR> Sets/Returns the current Audio EDID Source
IA?<CR> – Returns the current Audio EDID Source
IA2<CR> -- L/R
IA1<CR> -- Multi-Channel
IA0<CR> -- Pass-Thru (Factory Default)
MUTx MUTx<CR> Sets/Returns the current muting state
MUT?<CR> -- Returns the current muting status
Where 'x' is one of the following:
0 -- No Muting (Factory Default)
1 -- Mute HDMI Output Video and Audio
2 -- Mute HDMI Output Video
3 -- Mute HDMI Output Audio
4 -- Mute Both External SPDIF and L/R Outputs
5 -- Mute External LR Output
6 -- Mute External SPDIF Output
OAx OAx<CR> Sets/Returns the current HDMI Output Audio status
OA?<CR> – Returns the current HDMI Output Audio Status
OA1<CR> -- HDMI Output Audio is ON (Factory Default)
OA0<CR> -- HDMI Output Audio is OFF
SA
x
SAx<CR> Sets/Returns the current Embed Audio Source
SA?<CR> – Returns the current Embed Audio Source
SA2<CR> -- L/R
SA1<CR> -- Multi-Channel
SA0<CR> -- Pass-Thru (Factory Default)
ST Returns the current system status
ST<CR> -- Returns the current system status
UPGRADE One Moment...<CR>
Run Firmware Upgrade tool now<CR> Used to place system into the firmware upgrade mode.

HD-AUD-IO
10 © Copyright 2019 Hall Research, Inc.
6.0 Windows Graphical User Interface
The HD-AUD-IO is controllable via free Windows® based software available
from the Hall Research website at:
http://hallresearch.com/page/products/HD-AUD-IO
1.1. Software Installation Prerequisites
•A PC with Windows XP® OS or later
•USB port
•Microsoft® .NET Framework 2.0 or later (most recent OS including Windows 8
and later include this software and no action is required). If the .NET
Framework 2.0 or later is not installed on your PC, the Microsoft™ website has
free downloads available.
1.2. Software Installation
If an earlier version of this particular software was previously installed, UNINSTALL
the program first from either the Add/Remove Programs section of the control panel
or by running the previous installation’s SETUP.EXE and selecting “remove
application”.
•Install the software by executing the SETUP.EXE program from the installation
source directory
•Accept the default settings, but if you want to specify a particular installation
directory other than the default, you may do so.
•Once the HD-AUD-IO software installation has completed, either click the
desktop icon or navigate the Start Menu to
Start -> Programs -> Hall Research -> HD-AUD-IO
1.3. General
In most installations the use of the
software GUI is not required as most
functions can be performed using the
front panel buttons on the product.
You can use the software to export
EDID files from the device.
It is possible to connect more than one HD-AUD-IO to the PC (using several USB
ports of the PC). The same software GUI detects all connected devices and allows
control from the same application.

HDMI 2.0 Audio Inserter & Extractor
© Copyright 2019 Hall Research, Inc. 11
1.4. USB Device Detection
The HD-AUD-IO software uses standard Windows® drivers, which automatically
configure the USB port after connection and do not require the installation of any
special USB drivers.
The first time you connect the HD-AUD-IO to the PC, you may experience a short
delay and a windows notification pop-up message may display.
1.4.1. The software GUI scans the HD-AUD-IO
settings continuously in real-time, all
changes to the system are reflected in
the software GUI.
1.4.2. If no HD-AUD-IO device is attached to
the system, the on-screen fields are
disabled (grayed out).
1.4.3. Only one instance of the software GUI can run at a
time. Executing the application more than once will
result in a warning message.
1.5. Tool Bar Menu
1.5.1. EXIT
Exits the application
1.5.2. TOOLS
Factory Defaults
Restore the device to factory default settings.
The user must confirm the action.
Export EDID
Save the currently selected EDID as a 256-byte binary file.
Firmware Update
Allows users to field upgrade the device application firmware. Application
firmware that does not support this function will disable this option.
ABOUT
Displays screen with software versions, website
link, legal disclaimer and copyright information.
The new device detection and driver auto installation typically only occurs
once. Thereafter, devices that are reconnected detect with no delay or
messa
g
e.

HD-AUD-IO
12 © Copyright 2019 Hall Research, Inc.
1.6. Status Bar
The bottom bar of the screen shows the current USB status as follows:
“Scanning for Hardware…”
The GUI software is looking for HD-AUD-IO devices.
The screen controls are disabled until a HD-AUD-IO device attaches.
“Connected – XX”
Where XX is the number of HD-AUD-IO devices connected to the PC.
1.7. Controls
Embed Source
This button selects which audio source to embed; either 3.5mm L/R IN,
SPDIF IN or HDMI IN.
Audio EDID
This button selects how the EDID is altered; either L/R (2 Channel), Multi
(Multi-Channel) or Pass-Thru from the HDMI output.
Video EDID Emulate/Pass-Thru
Pressing this button quickly selects whether the EDID given to the source
is from a previously stored EDID or from the HDMI OUT display.
Press and hold the button for more than 3 seconds. After the LED blinks
once, release the button to LEARN the EDID connected to the HDMI OUT
connector. If there is an error learning the EDID, the VIDEO EDID LED will
blink 10 times.
Press and hold the button for more than 7 seconds. After the LED blinks
twice, release the button to factory default the device.

HDMI 2.0 Audio Inserter & Extractor
© Copyright 2019 Hall Research, Inc. 13
1.8. Digital Input
This area controls and shows the desired mute setting which occurs when
the DI (digital input) terminal connects to ground.
The indicator will be 'RED' when the DI is un-grounded and 'GREEN'
when the DI input connects to ground.
The factory default setting is to mute only the HDMI audio output.
Click the desired setting to change the factory default.
Setting Functionality
OFF No muting occurs
AV Out Both HDMI Audio and VIDEO are muted
Video Out Only HDMI Video is muted
Audio Out Only HDMI Audio is muted
Both Ext Both L/R Out and SPDIF Out are muted
Ext L/R Only L/R Out is muted
Ext SPDIF Only SPDIF Out is muted
1.9. Audio Muting
This area controls and shows the current system muting state. This setting
can be different from the setting above for when the Digital Input.
For example,
With 'Audio Muting' set for AV Out and the Digital Input setting is OFF.
When the Digital Input terminal connects to ground, the Audio and Video
muting turns off.
7.0 Troubleshooting
If you are experiencing problems getting the system to work properly, please
use the following troubleshooting suggestions.
•Ensure that all connections to the device are solid. Loose connections
are the number one cause of issues.
•Try resetting the system by unplugging BOTH the power supply and
HDMI IN connectors, waiting 5 seconds and plugging them back in.
oThe front panel LEDs cycle several times at power up; after
~15 seconds, audio and video should be passing through the
device.
•Try restoring factory defaults using the front panel VIDEO EDID button
(hold for 7 seconds) or via RS-232 command.
•Cycle the EDID mode with the front panel VIDEO EDID button.

HD-AUD-IO
14 © Copyright 2019 Hall Research, Inc.
Contacting Hall Research
If you determine that the HD-AUD-IO is malfunctioning, do not attempt to repair
the unit yourself.
Instead, contact Hall Research Technical Support at 714-641-6607. To return
the unit to Hall Research you must first get a Return Authorization (RMA)
number. Package the unit carefully, if returning. We recommend that you use
the original container.
8.0 Specifications
Video
Standards DVI (single link)
HDMI 1.4 and HDMI 2.0b video specifications including 12 bit color depth, 3D video
HDCP 2.2
Connectors HD-AUD-IO
(1) HDMI Input
(1) HDMI Output
Resolutions DVI signal VGA (640x480) thru WUXGA (1920x1200)
HDTV signal 480p through 4K 60 Hz 4:4:4
Audio
Formats LPCM 2CH Audio (32, 44.1 and 48 KHz sample rate)
Digital Audio multi-channel 2.1, 5.1, 7.1
Other Signals
RS-232 (1) RX, TX and GND on Terminal Strip
RS-232 Baud Rate: 115200, N, 8, 1
Digital Input Dry Contact, connect to ground to trigger configured action
General
Power Supply 100 VAC to 240 VAC, 47-63 Hz, External; 5 VDC 1.0 ADC
Temp/humidity Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, non-condensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, non-condensing
Current Draw @5 VDC - 85 mADC (typical), 200 mADC ( fully loaded)
Cooling Convection
Enclosure type Metal (Steel)
Dimensions
Model
Shipping
0.9" H x 4.47" W x 2.53" D
(23 mm H x 114 mm W x 64 mm D)
4.0" H x 10.0" W x 8" D
(101.6 mm H x 254 mm W x 203.2 mm D)
Product weight Model Only HD-
A
UD-IO - 0.5 lb (0.227 Kg)
Shipping HD-AUD-IO - 1.6 lb (0.726 Kg)
Safety CE
EMI/EMC CE, FCC Class A
MTBF 90,000 hours (estimate)
Warranty 3 years parts and labor
Specifications are subject to change without notice

HDMI 2.0 Audio Inserter & Extractor
© Copyright 2019 Hall Research, Inc. 15

© Copyright 2019. Hall Research, Inc.
All rights reserved.
1163 Warner Ave., Tustin, CA 92780
Ph: [phone]