The CD-DAP-HD is a modular HD/SD-SDI digital audio loudness processor. It is used in 1RU or 2RU CD SERIES platform. Dynamic audio processing including compression, limit, expansion, enhancement and gain control is available for audio signals associated with the HD/SD-SDI inputs. Compression/expansion threshold can be selected according to audio VU value or loudness. The module supports 1 program input and provides 2 program outputs. Audio signals associated with the program input can dynamically and fully controlled. By-pass protection is supported on the program input so that the program can be output without any interruption. Auto cable equalizing is up to 1000 ft (300 m) for SD-SDI input and 500 ft (160m) for HD-SDI input. A RJ-45 connector is provided for control of dedicated control panel remotely. Audio signals associated in program input can be monitored. A programmable GPI interface is provided to trigger bypass protection. Additionally, control of CD-MASTER application is supported.