<p>This device extracts the digital audio signal from the HDMI input and converts it to 2 channel analog stereo output or 5.1 channel Audio outputs. </p> <p>To improve our customers experience, we posted the following three methods if you experience no sound from output. </p> <p>1. The EDID-Option Switch: Switch the EDID-Option buttom in the front, change it between 2CH, 5CH or pass. </p> <p>2. Turn Off Dolby Digital Plus: TOSLINK (SPDIF) does not support Dolby Digital Plus, you need to turn off Dolby Digital Plus function, then the sound can go through the extractor. </p> <p>a: Amazon Fire TV or Amazon Fire TV Stick </p> <p>Settings - Display Sound - Audio - Dolby Digital Output - Dolby Digital Plus off </p> <p>b: Apple TV </p> <p>Settings Audio Video - Dolby Digital - on </p> <p>c: Chromecast </p> <p>Chromecast plays the contents from your video source, please make sure to turn off the Dolby Digital Plus on the video source through the play devices.</p> <p>3. Do Not use HDMI to DVI or HDMI to VGA cable, will result in no audio come out. Instead, please use HDMI to HDMI cable.</p>