The AU-11PRO is a Full 4K HDMI Audio Embedder/De-embedder with ARC functionality. It extracts audio from HDMI, ARC (from HDMI Output 1), optical, or analogue sources and outputs it simultaneously via HDMI, optical, and analogue outputs. The device supports resolutions up to 4K@60Hz (4:4:4, 8-bit) with HDR and 10-bit color. Compliant with HDMI 2.0, DVI 1.0, and HDCP 1.x/2.2 standards, it features 1 HDMI input and 2 mirrored HDMI outputs supporting 4K UHD+ (18Gbps). Video pass-through includes 10/12-bit HDR sources. Audio pass-through supports LPCM (up to 8 channels), Bitstream, and HD Bitstream formats. The optical output is limited to LPCM 2.0 and standard Bitstream sources, while analogue audio output is limited to LPCM 2.0 sources. EDID management provides bypass, pre-made EDIDs, and user-modifiable EDID options. Control is available via front panel selector dials and RS-232 style control through USB-C.