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This report is intended to accompany AES50-2005 High-resolution multi-channel audio interconnection (HRMAI). It provides additional background, rationale and implementation advice. It should be read in conjunction with AES50-2005. In particular, the first section of this document provides an overview of the technology, which may aid understanding of the context of the standard.
HRMAI provides a professional multi-channel audio interconnection with a number of distinctive characteristics:
\95 Support for a wide range of commonly-used digital audio coding formats
\95 Low and deterministic latency
\95 Use of ubiquitous ?Category-5? data cable
\95 Interconnect span up to 100 m
\95 High-quality full-duplex clocks transmitted in parallel with audio data
\95 Full-duplex audio interconnection
\95 5 Mbit/sec full-duplex
auxiliary data connection, compatible with Ethernet networks.
HRMAI is a high-performance point-to-point audio interconnection rather than a network, although the auxiliary data
may operate as a true network, independently of the audio.
Companion document AES-R6-2005 provides additional background information and implementation guidelines.
The shielding (or screening) of audio equipment, cables, and microphones can be critical for EMC. The improper connection of these shields can cause common-impedance coupling in equipment. From XL connector usage, where Pin 1 is standardised as the designated shield contact, this has been identified as the Pin 1 problem
The 2006 revision specifies an Organisationally Unique Identifier, and simplifies the minimum requirements to ensure interworking. (26 pages)
Report AES R4-2002, also available from this site, is a useful explanatory supplement
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