※ Brand new, unused 【HDMI Audio Extractor】This HDMI audio extractor separates audio signals from HDMI signals of computers and HDMI video devices, converting them into optical digital signals and analog audio signals for output. While outputting the original HDMI signal (video and audio) to a display or projector, it separates the HDMI audio and outputs it to an AV amplifier or speakers, allowing you to enjoy powerful sound. 【Supports ARC function for high-quality audio output from TV】Supports ARC (Audio Return Channel), extracting audio from the TV to a soundbar or amplifier. Connect the TV HDMI (ARC) port to this switch's HDMI output port with an HDMI cable, and connect to a soundbar, speakers, home theater, AV receiver, etc. using optical toslink or 3.5mm. When using the ARC function to output audio to an external amplifier, a TV that supports ARC is required. ※ When using the ARC function, the output is only optical digital. 【3 audio output modes available】The HDMI audio extractor has three audio pass-through modes to suit your needs, allowing you to switch according to your equipment. PASS: Outputs the HDMI audio source from the source device directly through the product as an HDMI signal. 2CH: If your monitor/amplifier/speaker does not support 5.1CH, it is necessary to set the audio output mode of the source device to PCM/LPCM. By setting the product's audio mode to 2CH, PASS, you can output audio. 5.1CH: If your monitor/amplifier/speaker supports 5.1CH, and the audio source of the source device is also 5.1CH, by setting the product's audio mode to 5.1CH, PASS, you can output audio.