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The 8685 is Orban’s second-generation surround/2.0 processor. In addition to the effective automatic loudness control of its predecessor, the 8685 offers new input/output capabilities that include support for SDI and HD-SDI and for Dolby E. Dual redundant power supplies help ensure maximum uptime. In addition to surround processing, the 8685 can simultaneously provide up to four channels of 2.0 processing, allowing it to provide all the audio processing necessary for a typical ATSC broadcast with multiple subchannels. Like the 8585, the 8685 is dialnorm-aware. Loudness control is excellent when measured by the ITU BS.1770-2 and EBU R-128 standards or by the 8685’s built-in CBS Loudness Meters, allowing stations to comply effortlessly with the requirements of the CALM act. An included logging application allows time-stamped indications of the 8685’s built-in BS.1770-2 short-term and integrated loudness meters to be written to a Windows PC’s local or network storage.