Your browser is out-of-date!

Update your browser to view this website correctly. Update my browser now


APT Horizon NextGen Delivers Mike

They’re 200 miles apart; an IP codec brings them together seamlessly

WICC(AM) in Bridgeport, Conn., has been a fixture in the southern part of that state for generations. Recently long-time news director and morning show co-host Mike Bellamy relocated to central Pennsylvania due to family commitments. We needed an engineering solution that would enable him to continue his role on the station and stay on the show.

We wanted to ensure that while working out of the Cumulus studio in Harrisburg, Mike was able to interact seamlessly with fellow host Tony Reno back in Bridgeport. Low latency and a high degree of reliability would be critical in order for the audience not to notice that the hosts were actually more than 200 miles apart.


In the past, the only viable solutions to achieve this would have been an ISDN line or dedicated telco T1 link, both expensive options. We discovered an alternative in APT’s Horizon NextGen IP audio codec with SureStream technology.

For us, this delivers a more economical alternative, as the APT codec simply utilizes the existing house Internet links so we didn’t need to install or pay for any new lines. On the Harrisburg side we have both a 20 Mbps Internet connection from Frontier and a Comcast cable modem. We have a similar arrangement in Bridgeport using our dedicated business Internet service and a second, less expensive connection, primarily used for backup purposes.

Having looked at a few other codecs from various manufacturers, we felt that the APT box offered the best combination of low latency and robustness and at an affordable price. It also helped that we have had positive results at other Cumulus markets with APT codecs. One example is for network origination from our Nashville studios to the Westwood One Networks satellite distribution facility in New York.

In order to get the full benefit of APT’s SureStream data signal redundancy technology, we connect the APT codecs at each studio to both the primary dedicated Internet and secondary Internet links, which protects the content against any dropouts and outages.

When we installed the units in the fall of 2013, all went well but we did notice some occasional dropouts on the line. A quick investigation uncovered that one of the codecs was only connected to a single link and so we weren’t actually using SureStream to its potential. Since we fixed this issue, the system has worked flawlessly without a dropout in the last six months.

To achieve the low-latency connection that we need, we use the Enhanced aptX algorithm on the APT codec, which keeps delay to a minimum and the audio quality at a high level. With SureStream, we can also keep the latency consistent throughout the broadcast so that the hosts do not have to deal with any drift, which could cause them unnecessary distraction.

Some of the AoIP codecs that I reviewed offer methods to deal with the constantly changing behaviour and latency of the Internet, but many involved scaling back the audio quality and/or altering the latency in order to keep the link alive. For a live, interactive broadcast, this doesn’t work for us, so consistently low latency was a critical factor.

The APT codecs and SureStream have enabled us to continue to deliver “Tony & Mike in the Morning” on WICC without the audience noticing that anything has changed. Perhaps the greatest testament to just how well it works is the fact that members of the public often drop by the Bridgeport studio to see the hosts. We just tell them that Mike is in the bathroom!

For information, contact Tony Peterle at APT/WorldCast Systems in Florida at (305) 249-3110 or visit