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AES10-2020: AES Recommended Practice for Digital Audio Engineering - Serial Multichannel Audio Digital Interface (MADI)

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AES10-2020: AES Recommended Practice for Digital Audio Engineering - Serial Multichannel Audio Digital Interface (MADI)
Printing Date: 2020-11-27
Publication History: Pub. 1991; Revised 2003; Revised 2008; Addendum 2010-02-19; Reaffirmed 2014; Reaffirmed 2019; Revised 2020

This standard describes the data organization for a multichannel audio digital interface. It includes a bit-level description, features in common with the AES3 two-channel format, and the data rates required for its utilization. The specification provides for the serial digital transmission of 32, 56, or 64 channels of linearly represented digital audio data at a common sampling frequency within the range 32 kHz to 96 kHz, having a resolution of up to 24 bits per channel. The format makes possible the transmission and reception of the complete 28-bit channel word (excluding preamble) as specified in AES3, providing for the validity, user, channel status, and parity information allowable under that standard. The transmission format is of the asynchronous simplex type and is specified for a single 75-ohm coaxial cable point-to-point interconnection or the use of fibre-optic cables.

This revision includes minor changes to conform to recent revisions of AES3 and AES5 and provides clarifications of sync reference signals and link transmission-rate tolerance, and references for 'NRZI' and the 4B5B coding scheme. (18 pages)

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