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'''Architecture for Control Networks''' ('''ACN''') is a suite of [[network protocol]]s for theatrical control being developed by [[ESTA (Entertainment Services and Technology Association)]]. The first official release is formally referred to as ANSI E1.17 - 2006 - Entertainment Technology - Architecture for Control Networks.
It may replace [[DMX (lighting)|DMX]] as the control protocol for lighting systems and will be used for controlling more complex devices like video playback servers (media servers) and [[audio mixer]]s and has been proposed as the sole or primary transport for [[Midi#HD-MIDI|HD-MIDI]]. The protocol is designed to be layered on top of [[User_Datagram_Protocol|UDP/IP]] and therefore will run over standard, inexpensive [[Ethernet]] and [[802.11]] (Wi-Fi) network links.
ACN relys on [[User Datagram Protocol|UDP]] in order to pass its messages. Where reliability is required, the Session Data Transport sub protocol allows semi-reliability of only the latest value for a particular "channel".
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