The AP-536 is a compact device that allows you to extract embedded audio from an HDMI signal. Some video displays accept an HDMI video signal but do not provide a way to process the embedded audio. The AP-536 will extract, process and present for distribution virtually any of the standard embedded audio formats and provide both optical and analog outputs for connection to your audio amplification system. AV Toolbox offers a wide range of video, audio and multimedia products.