An essential audio requirement at any major racetrack is reliable race-control communications. One such track is America’s – a 740-acre park located just east of Birmingham, Alabama, which features a 16-turn, 2.38-mile course serving Grand-Am, Nascar and AMA Superbike events. The Indy Grand Prix of Alabama is a major attraction.

The track features 25 curves, each with a corner station where volunteers post flags when issues arise, and it’s crucial that the people staffing these stations be in touch with each other and with Race Control. To ensure clear, properly prioritised communications in an extremely noisy environment, system integrators Data Plus Security installed a custom system based on a Symetrix Prism 8x8 DSP unit.

‘The track used to have a jury-rigged system made out of telephone parts, and it was a disaster,’ says Data Plus owner Jonathan Curelar. ‘They also had two-way radios but only one person could talk at a time. They have 30 people on a conference who each need to talk. It was a big issue.’

Data Plus had previously installed a camera system at the site: ‘They wanted two-way conversations including all stations, using equipment that did not need batteries. They needed noise cancelling mics and headphones because Indy cars roar by, putting out 140dB of noise just a few feet away from the corner stations. The products had to be able to withstand weather, too.’

Curelar’s team designed custom weather-resistant enclosures to house the gear and selected the connectors, amps, and noise-cancelling microphones and headphones. Then they took advantage of preexisting Cat6 wiring between Race Control and the corner stations to implement a Dante-based digital communications system, managed with the Symetrix Prism 8x8.

‘We use Symetrix DSPs in a lot of projects,’ Curelar explains. ‘We’ve installed Symetrix-based conferencing systems in a variety of courthouses, for instance. Symetrix has awesome products and continuously improves them. I knew Prism had everything I needed to tie together and manage the track’s station communications.’

The Barber Motorsports system not only had to enable 30 people to conference together, it had to enable Race Control to manage the conversations so key communications could be heard. ‘The Race Control director only talks when it’s important, so that has to take priority over the individual stations,’ Curelar says. ‘Indy races have a race director, and nobody can talk over them. And at the smaller races, many of the people at the stations are volunteers who sometimes chat, which may not interfere with important announcements. We also needed controls for the individual stations because you don’t always have the same person at the same station, and some people don’t hear as well, or speak very loudly, or are soft spoken.’

Curelar’s team used Symetrix Composer to create the controls and showed the track staff how to monitor and control each station. They created different paths and priorities, including a ducking routine that lowers all microphones except Race Control. ‘We are there live with the Composer software on race day, too, so we can do on-the-fly adjustments as the race goes on,’ he says.

The Symetrix-based system proved reliable from the start. ‘We installed it just a week before an Indy event, and it was all ready to go by Thursday, when we did the first full check with Indy cars on the track,’ he recalls. The new communications system performed so well throughout the event that the Indy coordinator proclaimed it by far the best she had seen and took Data Plus’ contact information to pass to other tracks.

Although the quality and features of the Prism 8x8 were major reasons Curelar chose Symetrix, he also cites his experiences with the manufacturer’s staff. ‘The people at Symetrix are some of the best I’ve ever worked with,’ he says. ‘We are not a big company but when I approached Symetrix about becoming a dealer, they did not ask how much I was going to sell; they just cared that their product was going to work for me. The customer support is awesome, and the guys in tech support are phenomenal. So I feel comfortable with Symetrix, and I’m not going to anybody else.’

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