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FEATURE: STADIUM AUDIO


Clear-Com Eclipse matrix systems, 4-wires and intercom control panels enter the fibre-optic world and stadiums, in particular, stand to benefit from the union. Montoya outlines the case


for advanced DSP. “The size of world-class stadiums means that traditional audio cabling is inefficient,” he says. “For this kind of project you need something like Bosch’s OMNEO media networking architecture: transport of audio and control in one single cable using TCP/IP infrastructure.” “Dual redundant AES67


networking ensures compatibility with standard IT infrastructure,” adds Barbour, “so the audio system can leverage the site-wide, converged network that facilitates all other networked components in the venue. Our Q-Sys Core processors provide complete, automated processing redundancy allowing virtually zero downtime. Critical I/O can be connected to dual redundant I/O devices, ensuring that important audio inputs and outputs are always available. GPIO on all of the networked I/O


and Core processors ensures that integration with VA systems at any location in the building is simple, while network-connected and monitored paging stations allow distribution of paging capability throughout the stadium. “Standards-based,


networked audio and control integration with digital video distribution systems such as Cisco StadiumVision and SVSi ensures that the audio, video and control components in the venue are truly tied together in one networked, integrated package. Native AES67 support ensures compatibility with any Ravenna-, Telos- or Livewire- based broadcast system that should arrive for an event. Dante and CobraNet I/O cards enable the designer to breakout to third-party networking protocols at the edge, as required, for integration with touring and production audio systems.” Dave Howden, director of technical services for Community Professional Loudspeakers, agrees that fully integrated audio across the main bowl, the ancillary zones and the broadcast


[JUNGLE TELEGRAPH]


According to Dave Howden of Community Professional Loudspeakers (pictured), a spirit of integration already exists between the live and broadcast interests vested in the world-class stadium – and Community has latterly installed a large inventory at the Arena da Amazonia in Manaus, Brazil for this summer’s World Cup. Put simply, it’s a case of share and share alike… “The routable programming


sources may include PA announcer only; full programme; local radio or TV audio, un-delayed; press box announcements; and advertising – either audio or audio plus video to promote


infrastructure is now possible (see boxout above). “It’s also very desirable for commercial purposes,” he says, “and essential for life safety when a venue has to take responsibility for the security of large numbers of people. It’s also assumed that all sound systems will achieve the expected intelligibility, SPL and coverage.


events and sponsors,” he explains. “AV interfaces to the broadcast bays are critical and must be versatile to enable signals to flow in either direction depending on the event needs. Copper remains the easiest interface, as many broadcast trucks – usually hired for a single event – are not fully digital. “Broadcasters often share their camera angles with in-house production, and some stadiums don’t have their own cameras – they rely on the broadcasters. They also often share their audio effects feed with the facility, which in turn distributes the ‘sounds of the game’ to other radio or internet broadcasters


“For all systems,


interconnectivity by a reliable digital and redundant link to amplifier rooms is greatly desirable. Amplification is expected that provides continuous monitoring of key amplifier and speaker parameters back to the operator’s position. This is especially important for systems that fall under,


via analogue distribution through the press areas of the facility.”


or double as, life safety systems. They must be able to interface to the command centre, which may take control of AV systems if a situation warrants it.” Zoning is another fundamental requirement. “The ability to zone off main seating areas is also desirable,” adds Howden. “If an upper deck is not in use


22 June 2014


www.installation-international.com


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