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Simplecom HDMI Audio Extractor 4K HDMI to HDMI and Optical SPDIF + 3.5mm Stereo (CM423v2)

Simplecom HDMI Audio Extractor 4K HDMI to HDMI and Optical SPDIF + 3.5mm Stereo (CM423v2)
  • Audio-Cables-Simplecom-CM423v2-HDMI-Audio-Extractor-4K-HDMI-to-HDMI-and-Optical-SPDIF-3-5mm-Stereo-3
  • Audio-Cables-Simplecom-CM423v2-HDMI-Audio-Extractor-4K-HDMI-to-HDMI-and-Optical-SPDIF-3-5mm-Stereo-1
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  • Product Name:
    Simplecom HDMI Audio Extractor 4K HDMI to HDMI and Optical SPDIF + 3.5mm Stereo (CM423v2)
  • Model Number:
  • Brand:
  • Manufacturer Warranty:
    1 Year


Simplecom CM423v2 HDMI Audio Extractor 4K HDMI to HDMI and Optical SPDIF + 3.5mm Stereo
HDMI is capable of transmitting both video and audio signals through a single cable. However, in cases where we need to output audio to an external speaker system that has analog or optical input, this audio extractor serves as an ideal solution.

This adapter allows the user to extract the embedded audio from an HDMI source and output it separately through an analog 3.5mm audio jack or a digital optical SPDIF connector. The video stays within the existing HDMI signal and can be sent on to the HDMI display.  

You can easily place this compact adapter behind your AV equipment, and power it through a USB cable that can draw power from either a USB charger or an available USB port on your TV, media player, or PC. It is compliant with both HDMI 1.4b and HDCP 1.4 standards.

  • Optical SPDIF and 3.5mm audio output extracted from HDMI input

  • One HDMI output for HDMI pass-through

  • Ideal solution for connecting external speaker system with analog or optical input

  • SPDIF and 3.5mm jack can output audio simultaneously for 2.0CH audio

  • HDMI 1.4b and HDCP 1.4 Compliant

  • Supports HDMI resolution up to 4K Ultra HD

  • Powered by USB, plug and play

  • Supports compressed and uncompressed audio format, such as DTS-HD, Dolby TrueHD, Dolby Digital, PCM, LPCM


HDMI Version

HDMI 1.4b

HDCP Version

HDCP 1.4

EDID Support

EDID 1.4


1x HDMI Female

Audio Outputs

1x SPDIF (Optical), and 1 x 3.5mm Stereo Audio (Analog)

Video Output

1x HDMI Female (HDMI pass-through)

HDMI Resolution Support

480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p

Audio Format Support

DTS-HD, Dolby TrueHD, Dolby AC3, PCM, LPCM, DTS, DSD

Max Bandwidth

400 MHz

Max Baud Rate

10.2 Gbps

Input/Output TMDS signal

0.5~1.5Volts p-p (TTL)

Input/Output DDC signal

5Volts p-p (TTL)

Max working current


Operation Temperature

-10°C ~ 50°C


75 x 55 x 25mm (LxWxH)



Package Contents

1x HDMI Audio Extractor

1x 0.5M HDMI Cable

1x USB Power cable

1x USB Wall Charger

1x User Manual


Support video resolution up to 4K@60Hz (YUV 4:2:0)

USB-C port is for power input only

About 3 Audio Modes

TV: It will detect audio setting automatically from TV EDID

 (3.5mm jack will be disabled   if 5.1 audio is detected)

2.0: Both SPDIF and 3.5mm jack will output 2CH stereo audio

5.1: SPDIF will output 5.1 channel audio, 3.5mm jack doesn’t support 5.1 channel and it will be disabled


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