The ALF-MUK44N is a 4×4 compact HDMI matrix switcher which is specially designed for cost conscious projects and buyers. It features not only basic functions like cross-point switching and control (IR, RS-232 and IP), but also advanced functions such as auto-downscaling for each HDMI output when it is connected to 1080P display. There is a SPDIF audio breakout for each HDMI output, to provide more audio feeds to a multi-zone audio system.

Product Features

  • 4 HDMI Inputs and 4 HDMI Outputs
  • All HDMI inputs and outputs support HDMI with HDR formats, including HDR 10, HLG
  • HDCP 2.2 compliant
  • Built-in 4K-1080P downscaling for each HDMI Output; the matrix can downscale 4K@60Hz 4:4:4 to 1080P@60 4:4:4
  • 4K downscaling works automatically when the matrix is connected to a 1080P display and can be set to ON/OFF via the API commands
  • Each HDMI output has a SPDIF audio breakout and supports formats up to 5CH HBR (High Bit Rate) or 2CH PCM audio
  • Supports smart EDID; each input can be assigned to smart EDID mode
  • Supports EDID presets, EDID copy, and EDID write
  • By default, each input EDID is set as 4K@60 4:4:4 HDR with 5.1CH encoded audio
  • Supports audio mute as the four SPDIF outputs can be muted separately by API commands
  • Supports upgrading firmware via both micro-USB and web UI (for MCU and web module)
  • Rich control options, including RS-232, IR, IP Control and front panel buttons control



Input/Output Port

4 x HDMI In, 4 x HDMI Out, 1 x RS-232,

1 x IP Control (RJ45), 4 x SPDIF Out (Digital), 1 x FW (Micro USB), 1 x DC 12V IN



Input/Output Signal Type

HDMI with 4K@60Hz 4:4:4, HDR 10, HLG &

Dolby Vision, HDCP 2.2

Note: Dolby vision is not supported in down scaler mode.

800×6008, 1024×7688, 1280×7688, 1280×8008,
1280×9608, 1280×10248,1360×7688,
1366×7688, 1440×9008, 1600×9008,

Input/Output Resolution Supported

1600×12008, 1680×10508,1920×12008 SMPTE:

720x576P6, 1280x720P6,7,8,

1920x1080P2,5,6,7,8, 3840×21602,3,5,6,8,
2 = at 24 Hz, 3 = at 25 Hz, 5 = at 30 Hz, 6 = at
50 Hz, 7 = at 59.94 Hz, 8 = 60 Hz



Audio Format

HDMI IN/OUT: Fully supports audio formats in HDMI 2.0 specification, including PCM 2.0/5.1/7.1, Dolby TrueHD, Dolby Atmos, DTSHD Master Audio and DTS:X

S/PDIF OUT: Supports PCM 2.0/5.1, Dolby

digital and DTS up to 5.1 Channel

Maximum Data Rate 18Gbps
Control Method Front Panel Buttons, RS-232, IR, IP (Telnet,

Web UI



Technical sheet

User Manual

API Guide


Software Instructions

Step 1:

Unzip folder and open the folder called SmartSetGUI.

Step 2:

Launch the SmartSetGUI.exe file

Step 3:

Click on Language and select English

Step 4:

Close and restart the software for the change to take effect.

Step 5:

Click search and the device will be discovered.


1) Q -What is the Josawa ALF-MUK44N?

A – It is a four HDMI input by four HDMI output cost-conscious matrix switcher.

2) Q – Can I route the audio out?

A – Yes, each HDMI output has a SPDIF audio breakout.

3) Q – How is the unit controlled?

A – Via the front panel buttons, the IR remote, RS232 and IP Control.

4) Q – Does the unit support 4K down scaling?

A  – Yes, It can downscale 4K@60Hz to 1080P@60Hz. Works automatically when connected to a 1080P display.

5) Q – Does this unit have CEC built-in?

A – Yes, CEC needs to be activated via the Web GUI.