Key Digital KD-MS8x8G-2 User manual

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
1
KD
-
MS
8x8
G
-
2
8x8 4K 18G HDMI Matrix Switch with Independent Audio
Routing, Digital Optical and Analog Balanced / Un-balanced
Audio De-Embedding, Web Control UI

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
2
Table of Contents
About KD-MS8x8G-2 3
Quick Setup Guide 8
Connect 8
Configure Using KDMS Pro 8
Control 6
Application Example 10
Connections, Buttons, and LEDs 10
TCP/IP and RS-232 Commands 13
Specifications 17
Warranty Information 18
Product Warnings & Safety Instructions 18
Operation Manual
Please visit www.keydigital.com for the latest product documentation,
firmware, control drivers and software downloads. Product features and
specifications are subject to change without notice
Always follow the instructions provided in this Operating Manual.

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
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About KD-MS8x8G-2
Key Digital’s KD-MS8x8G-2 is a 4K matrix switcher with support of 18Gbps signal bandwidth and HDCP 2.2 for
routing and distributing 8 HDMI source signals to 8 displays. KD-MS8x8G-2 features 8 analog
balanced/unbalanced and optical digital audio outputs which may be independently controlled to follow the
HDMI output selection or separately switched to accommodate a wide variety of usage applications in
professional AV systems integration. KD-MS8x8G-2 supports all SD, HD, VESA and Ultra HD/4K video
standards up to and including UHD/4K 18G and 1080p. All UHD/4K EDID handshake files include HDR header
information.
Key Features
•HDMI Matrix Switching: 8 HDMI sources to 8 HDMI outputs
•Ultra HD/4K Support: 4096x2160 or 3840x2160 24/25/30/60hz at 4:4:4 (signals up to 18Gbps
bandwidth)
•HDCP Licensing: Fully licensed and compatible with HDCP 2.2
•HDR10 and Dolby Vision®: More life-like images through a greater range of luminance levels
•Resolution Support: Supports all SD, HD, and VESA (VGA, SVGA, XGA, WXGA, SXGA, UXGA) up to
8096x2160p
•Deep Color Support: Up to UHD/4K 60Hz 4:2:0/12 bits, 60Hz 4:2:2/12 bits
•Audio De-Embed: 6 pin balanced / un-balanced and digital optical outputs
•Independent Audio and Video Matrix: Output HDMI and Audio ports may route together or
independently
•Full Buffer System™: Manages TMDS re-clocking / signal re-generation, HDCP authentication to
source & display, and EDID Control handshake
•EDID: Internal library with 15 internal EDID configurations per input, in addition to native EDID data for
any Output/Display
•TMDS re-clocking: Support for long HDMI connectivity using Key Digital® HDMI cables
•Dolby Digital® & DTS™Audio: Supports 2-channel and multi-channel surround formats up to DTS-HD
Master Audio™, DTS:X®, Dolby® TrueHD, Dolby Atmos®
•Control: Front panel buttons/LEDs, Serial IR, Optical IR, RS-232 Control, and TCP/IP Control
•Web UI: Control AV routing and other basic functions from any web browser
•Control System Support: Key Digital® app ready, Compass Control® Pro ready. Fully controllable by
all IR, RS-232, and TCP/IP supported control systems via open API.
•Key Digital® App & KDMS® Pro Ready: Scan & detect population for pre-built GUI and TCP/IP control
via Key Digital® App and Key Digital Management Software™Pro (KDMS™Pro) PC setup Software
Accessories
•Power supply, KD-PS60W12VC 12V/5A
(60W) DC Power Jack, Screw In Type
•(2) Rack ears
•IR Remote Control, model KDRMSG
•(9) 6-pin terminal block
•USB Setup Cable, USB Micro to USB A

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
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Quick Setup Guide
Begin with the KD-MS8x8G-2, all source, display devices, audio system, and any other connected
peripherals powered off.
Connect
1. Connect HDMI sources to the input ports
2. Connect HDMI displays to the output ports
3. Connect analog audio outputs to amplifiers/receivers via the analog 6-pin phoenix terminals
4. Connect digital audio outputs to amplifiers/soundbars/receivers via the Optical outputs
5. Connect Control System. For KD-App control and/or IP control from a control system or PC, connect
TCP/IP port to network. RS-232 and IR control may also be utilized
6. Connect Power Supply. Screw-in the power supply to KD-MS8x8G-2, then plug-in to power outlet
7. Connect to KD-MS8x8G-2 from your PC using the USB micro port on the face of the unit
Configure
Configure KD-MS8x8G-2 with Key Digital Management Software Pro (KDMS Pro). Download HERE
1. With the USB cable connected as instructed above, open the KDMS Pro software and perform a USB
scan (fig. 1a). Choose “NO” and Start Scan when the USB Device Scan prompt appears (fig. 1b)
2. Choose the detected device from the Devices window (fig. 2)
3. Enter the desired unit name (fig. 3a), IP address (fig. 3b) and IP gateway (fig. 3c) settings for the unit
4. Save (fig. 8)
5. Select the desired EDID handshake for each video source (fig. 5)
6. Enter the desired Input and Output names and press Update Names (fig. 6)
7. Your unit is now ready to control from the web UI, KDMS Pro control panel, KD-App, or by professional
control system. Full access to all settings/commands is achieved via terminal session using Tera Term
or PuTTy software.
8. Power on video sources and displays / output devices to use system
.

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
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521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
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Control
Option 1: Control via Remote Control
•Matrix Switching –Video and Audio together
oIR Button Sequence = A, B
oA = Output # [1-8], B = Input # [1-8]
•Matrix Switching –HDMI AV ONLY
oIR Button Sequence = R1, A, B
oA = Output # [1-8], B = Input # [1-8]
•Matrix Switching –Audio ONLY
oIR Button Sequence = R2, A, B
oX = Output # [1-8], Y = Input # [1-8]
•Assign EDID Handshake to Input from EDID Table
oIR Button Sequence = R3, B, CC
oB = Input # [1-8], CC = Device Select # [01-15]
•Assign EDID Handshake Copy from Output A to Input B
oIR Button Sequence = R3, B, A

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
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Option 2: Control via KD-App, KDMS Pro™
KD-MS8x8G-2 is controllable by Key Digital’s user-friendly iOS App (downloadable in
the App Store) or Key Digital® Management Software™Pro (downloadable here).
1. Connect and Configure your KD-MS8x8G-2 as described in the Connect &
Configure sections
2. Download and open KD-App and/or KDMS™
3. Ensure the iOS device and/or PC computer are on the same network with KD-
MS8x8G-2
4. Perform a network scan in the KD-App/KDMS™and select the unit.
5. To control, first select the display / output,
then the source / input
6. Use the buttons at the bottom of the screen
to choose HDMI + External Audio (6a),
HDMI AV only (6b) or External Audio only
(6c) routing.
7. To enter KDMS Pro end-user mode, key
CTRL + ALT + N after selecting the unit in
the devices tree.
Option 3: Control via web UI
Access KD-MS8x8G-2’s web UI from any phone,
tablet, or PC. The web UI shows the input, output,
and unit name, for a user-friendly experience.
1. Connect and Configure your KD-MS8x8G-2
as described in the Connect & Configure
sections
2. Ensure the PC, phone, or tablet are on the
network with KD-MS8x8G-2
3. Enter IP Address of KD-MS8x8G-2 unit into
the web browser search bar
4. Enter password. Default password is
“admin”
5. Use the web UI to control video + external
audio routing (5a), HDMI AV routing only (5b), or External Audio routing only (5c). Audio muting is also
available for the HDMI and/or External Audio ports (5d).

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
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6. Use the Web UI Settings Menu (6a) to update names of the device, inputs, and outputs (6b), as well as
updating the network settings and Admin password (6c).

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
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Option 8: Control via professional control system
KD-MS8x8G-2 allows control over serial interface for bi-directional communication.
•For RS-232 control use pins 8, 5, and
6 of the Unit Control port. Baud Rate is
57,600
•For TCP/IP control the default static IP
address is 192.168.1.239, with port 23.
•KD-MS8x8G-2 supports KD’s standard matrixing protocol, so if you have controlled a KD matrix with a
third-party control system before, you will likely have success with the same driver/module.
a. Switching HDMI AV + External Audio together
i. SPOxxSIyy xx = output (01-08), yy = input (01-08)
b. Switching HDMI AV Only
i. SPOxxSByy xx = output (01-08), yy = input (01-08)
c. Switching External Audio only
i. SPOxxSAyy xx = output (01-08), yy = input (01-08)
•A carriage return is required at the end of each string. See the TCP/IP and RS-232 Commands
section for full command set and protocol.
Test for proper operation of the unit and cables in your system before permanently securing the
unit for final installation. Ensure that you leave enough ventilation space to provide sufficient
airflow and cooling

521 East 3rd Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1 –Nov, 2023
10
Application Example
Office AV HDMI matrix system with HDMI and de-embedded audio to each zone. The viewer can choose any of
the connected HDMI sources, with audio and video going to the display and independent selection of the audio
sources sent to the soundbar and multi-zone audio system. Web UI control from any smart tablet or phone.