The AJA HD10AMA HD/SD 4-Ch Analog Audio Embedder / Disembedder with DWP per user-selection, on a channel pair basis, either passes or embeds input audio. An XLR breakout cable comes included for inputting 4 analog channels. Audio levels are selectable too. The unit is constantly functional providing 4 outputs. As for video, the unit automatically detects whether input video is HD or SD and configures to either.