1)this is an HDMI EARC adapter instead of hdmi audio extractor as it comes with no normal audio ports such as toslinkcoaxialL/R.
2)It outputs audio via an hdmi audio ports instead.
3)your audio system must be capable of accepting hdmi audio input.
4)under some cases and some AV receiver the hdmi out of the receiver must be connected to a display(it will be a 720p black screen).Otherwise there wont be sound.
5)to Use Earc function pls make sure your TV comes with HDMI E-ARC port.
6) when E-ARC is on basiclly you can not control the volume by your TV remote.Tested with LG 65NANO95CNA 8K TV seems no luck.
Descriptions:
The 18Gbps HDMI eARC audio extractor supports a dedicated HDMI output only for audio extraction. It allows users to use existing AV receivers to receive 4K2K at 60Hz HDCP 2.3 content audio. The product also supports HDMI loop-out and 10-bit HDR (high dynamic range) pass-through and eARC / ARC.
Features-specifications:
Compatible with HDMI 2.0b and HDCP 2.3 / 1.x.
Support 18Gbps video bandwidth.
Supports video resolutions up to 4K2K at 60Hz.
24-bit RGB/YCBCR 4:4:4.
Support VESA format up to QSXGA at 60Hz.
HDR HDR10 HDR10- Dolby Vision pass-through.
Support PCM 2.0 LPCM 5.1 / 7.1 Dolby Digital Dolby Digital Plus Dolby True-HD Dolby Atmos DTS 5.1 DTS ES 6.1 DTS HRA DTS HD Master DTS: X.
Built-in equalizer retiming and driver.
Dedicated HDMI-compatible out for audio only with 720p black screen.
Support eARC/ARC audio (from TV) extraction to HDMI-compatible audio output.
Support CEC function and advanced EDID management.(not for volume cotrol)