BBC World Service production staff recently utilised Dante networking from Audinate to manage and deliver live coverage of the United States Presidential election to radio audiences worldwide.
On 8 November, the BBC World Service established a temporary production and distribution facility within its Washington DC bureau, providing coverage to as many as 250 million listeners including those of NPR partner stations, BBC Radio 4 and BBC 5 Live networks (as well as BBC local radio in the UK) as the events unfolded over a 12-hour period.
In a clear sign of the shift to digital, the use of Dante by the BBC World Service contrasted with their use of a legacy contribution and distribution architecture for live US Presidential election coverage four years ago. The transition to audio-over-IP using Audinate’s Dante networking technology massively improved efficiency across all business and technical aspects.
“It’s a big difference when you remove the labor of running hundreds of copper analogue audio circuits,” said Matthew Page, engineering manager at the BBC. “Four years ago, we had three broadcast studios sharing contribution sources, all connected by copper multicores, analogue talkbacks and analogue audio routers to switch mix-minus feeds. That was a lot of equipment and heavy cable, all of which had to be connected on site.
“This year, we configured most of the equipment in London, then connected it on site with readily available and inexpensive network cabling. We saved hundreds of hours of rigging and testing on location, and thousands of British Pounds overall. It was lightweight enough to mostly carry on the plane, which reduced our shipping costs by 80 percent.”
The complete system featured 17 Dante-enabled devices including 128×128 intercom/IFB, AES & analogue I/O and broadcast mixing consoles, all enabling the distributed routing of hundreds of circuits with built-in redundancy for immediate failover to a secondary network.
Inside the facility, the Dante network supported connectivity between the temporary studio in the basement-level conference room, and smaller studios in the main bureau on the eighth floor. Dante was also used to route over 30 incoming contribution feeds, with associated mix-minus, from variousIP and ISDN codecs. The AoIP network provided further efficiency, allowing simple off-the-shelf fibre Ethernet connectivity between the nine floors to be used.
The flexibility of the Dante network proved to be especially useful for communications across the bureau and election coverage production. Dante’s very low latency provided an additional benefit to presenters and guests, allowing each to listen to any live feed available on the audio network on headphones in one ear and studio output in the other without any programme delay.