This HDMI audio extractor decoder can auto convert HDMI input to 5.1 channel analog audio output, supporting decoding Dolby AC-3/DTS. It is widely used in families, schools, squares, concert halls, cinemas, and other public places to enjoy the shock effect of DTS or Dolby. The device has a fast start time of about 3 seconds and supports input resolutions up to 3840x2160@30Hz. It also features a metal case, anti-interference, and supports 6CH volume synchronous adjustment.