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Blog Central

Choosing a Baseline AoIP Protocol

Posted by Marty Sacks on Mar 22, 2017 1:45:00 PM

Since the AES67 standard was ratified nearly three years ago, a paradigm shift has occurred in the broadcast indus­try with AoIP becoming the topic both around the water cooler and in facilities around the globe.

By now, you probably already know and understand AoIP's benefits: It saves money. It makes for more efficient work­flows. It reduces the amount of equip­ment you need. It eliminates massive amounts of wiring. It leverages “off the shelf” IP-based components from the larger IT industry for easy integration.

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Topics: AES67, Audio over IP, aoip

Can I Use You as a Reference?

Posted by Jim Kuzman on Mar 22, 2017 1:40:00 PM

Everyone knows a bad reference can cost you a promotion or a job opportunity, but it can also be the source of frustrating intermittent television audio problems.

The widespread use of embedded SDI signals in lieu of discrete AES I/O makes dealing with clock reference a bit easier since the reference is an inherent part of the SDI bundle, but it doesn’t eliminate clock-related issues altogether.

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Topics: Audio Processing, Linear Acoustic, Television Audio

xNodes Mark the Spot on Florida's Gulf Coast

Posted by Tom Vernon on Mar 22, 2017 1:00:00 PM

Fans of public broadcasting outlets PBS and NPR living in southwestern Florida are served by WGCU, where the TV-FM public broadcaster has operated from the campus of Florida Gulf Coast University in Fort Myers for two decades. The station's Director of Engineering, Kevin Trueblood, has likewise been in the broadcast industry for 20 years, though only the last two of those years have been spent at WGCU.

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Topics: IP Audio Network Routing & Control, Omnia Audio, xNodes

Make a Proper IP Address Scheme for Your Livewire Facility

Posted by Jeff McGinley on Mar 15, 2017 11:49:17 AM

Want to get the most out of your Livewire facility? Axia Support Engineer Jeff McGinley offers up an important tip for optimal operation.

Something to consider during the planning stages of an installation is a proper IP address scheme for the entire facility. We recommend reserving a block of IP addresses per room, and then assigning the same IP address to identical devices. For instance, the IP address subnet is 192.168.2.X, then each room would have a certain amount of addresses per room. Typically the rack room would be assigned 20 addresses, start at the beginning of the subnet, with the switches taking the lowest IP address. Then each studio could get a block of 10 addresses or so. So the devices in the rack room would be addressed from through Each studio would get 10 addresses, so Studio A would be from to Studio B would be assigned to

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Topics: Audio over IP, Livewire, aoip, IP Studios

5 Tips for Converting to an AoIP Studio

Posted by Addison Burnside on Mar 15, 2017 11:20:00 AM


If you’re a general manager, considering an Audio over IP network for your facility makes sense. The technology is faster, cheaper, and better than previous methods to build broadcast facilities. By converting to AoIP, you not only tap into the power of current technology, you allow your facility to leverage the enormous universe of “off the shelf” IT devices that are used worldwide, and not just in the broadcast industry. Here are our top five considerations for general managers thinking about a move to Audio over IP. 

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Topics: Audio over IP, VoIP, aoip

TWiRT 340 - War Stories with Robbie Green

Posted by Kirk Harnack [TWiRT] on Mar 10, 2017 1:00:00 PM

Move 4 radio studios across town.  You’ve got two weeks.  Go!  Oh, and scrounge some equipment to make the STL systems work with an old T-1 circuit.  And, find some time to replace seven FM transmitters with new, solid-state units and full HD Radio. That’s the world of engineer, Robbie Green. Robbie joins Chris Tobin and Kirk Harnack on This Week in Radio Tech.


Chris Tobin, IP-Solutionist
Kirk Harnack, The Telos Alliance, Delta Radio, & South Seas Broadcasting


Robbie Green - Market Chief Engineer, CBS Radio, Houston

Show Links:

Studio Technologies Model 214 Talent Console

Soundcraft Si Expression 1 audio mixer

Ethernet Private Line (Carrier Ethernet)

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Topics: Broadcast Engineering, audio, audio quality

Audio Monitoring Within the Transition to AoIP

Posted by Shane Toven on Mar 9, 2017 11:25:28 AM

As signal chains have become increasingly complex, the challenges involved in managing and monitoring these paths have multiplied exponentially. Over the past few decades, we've migrated from handling a single channel of content using composite video and analog audio pairs, to elaborate multi-channel facilities routing HD video with embedded audio over SDI or in many cases discrete AES pairs. These audio signals are often a mix of 5.1 and stereo programs and in many cases encoded to or decoded from Dolby® at some point in the chain.

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25-Seven Launches TVC-15 Broadcast Audio Watermarking Monitor

Posted by Krissy Rushing on Mar 8, 2017 2:59:13 PM

The Telos Alliance this week announced the launch of the 25-Seven TVC-15 Broadcast Watermark Analyzer & Monitor, the first modulation monitor for watermarking. With TVC-15, radio stations in electronically measured markets can now monitor how each element in their programming supports audio watermarking.

Measurements happen in real time, without the need of a watermark encoder. Every 400 milliseconds, TVC-15 detects watermarks in any audio you feed it. This could be your own station's audio, or that of a competing station in your market. You can monitor any source, live or recorded.

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Topics: Audio Quality Monitoring & Analysis, ratings, audio watermarking

TWiRT 339 - Securing What Matters

Posted by Kirk Harnack [TWiRT] on Mar 3, 2017 1:00:00 PM

More hackers, more breaches, more ways for broadcast engineers to have a really bad day! Chris Tobin relates what can happen and the steps you need to take to patch your IT security holes. Plus, Les Kutasi joins us with news from Kathrein and the world of broadband antennas.


Chris Tobin, IP-Solutionist
Kirk Harnack, The Telos Alliance, Delta Radio, & South Seas Broadcasting


Show Links:

Shields UP! Internet Port Test (Click on Services, then Shields UP!)

IT Security podcast, “Security Now”

A Primer on Encryption for Policymakers (and a quick read for all of us)

VPN Technology Primer

Kathrein USA information

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Topics: Broadcast Engineering, audio, audio quality

Saving Sounds from the Dumpster

Posted by Tom Vernon on Mar 2, 2017 12:00:00 PM

As the Twentieth Century is rapidly receding in the rear-view mirror, historians, archivists and collectors furiously gather artifacts and documents before they all disappear. Forgotten by many, but not all, are the soundscapes of the past; both technological and natural in origin.

If you've worked in radio long enough, you already know something about changing soundscapes. The clattering of a teletype machine in the newsroom, the sound of records and reel tapes being cued and the once per second chunk-chunk-chunk of the Western Union master clock as it counts down the time remaining till the next hourly newscast, are all gone but not forgotten.

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Topics: Broadcast History, audio