Tag Archives: Ravenna

Calrec Stands For Freedom Of Choice In IP Transport

Why does IP transport have to be an either/or sort of thing? That’s what Calrec Audio has asked itself and, as a result, is taking steps to enable one video-over-IP and three audio-over-IP approaches.

Calrec will show support for multiple IP transport formats and protocols at NAB 2016.

Calrec will show support for multiple IP transport formats and protocols at NAB 2016.

“We had held back on publicly stating Calrec’s formal direction on AoIP until we had properly assessed the market and talked to our customers,” said Dave Letson, company VP of sales in a press release. “We strongly feel that it is not the role of a manufacturer to dictate which route to take, but to facilitate the broadcasters’ choices”

In keeping with that philosophy, Calrec at the 2016 NAB Show will feature support for three audio-over-IP protocols via an AES67/Ravenna interface, an AVB interface, and a modular I/O Dante card with AES67 compatibility, as well as the SMPTE 2022-6 video IP transport standard.

Calrec’s approach will enable gateway functionality, allowing audio-over-IP in one standard to be translated into another, the release said.

For instance, and AES67 signal can be sent out as SMPTE-2022, AVB, Ravenna, Dante or AES67, it said.

“Each signal also benefits from the management facilities inherent in Hydra2. This benefit is especially powerful in remote environments where multiple trucks are connected. It means that different units can operate across multiple formats in the field, and Calrec always has them covered,” said Letson in the press release.

See Calrec Audio at NAB Show booth C1745.

AES67: Are Two Ships Passing In The Night?

“Ships that pass in the night, and speak each other in passing,
Only a signal shown and a distant voice in the darkness…”
— Henry Wadsworth Longfellow, Tales of a Wayside Inn

A funny thing happened on the way to IP audio interoperability. The Audio Engineering Society committee that developed the AES67 standard for IP audio couldn’t agree on a discovery mechanism, so it included four optional methods, says Aidan Williams, CTO of Audinate, developer of the Dante networking tech used by more than 200 OEMs in products for the professional audio and broadcast markets.

Just to review, AES67 is supposed to provide a way for audio equipment with an IP connection from one manufacturer to hook up to a piece of IP-enabled audio gear from another and communicate.

At a very basic level, before that sort of IP communications can happen, each device needs to know what it’s connected to — a process known as system discovery.

In a pure sense, AES67 provides for interoperability because all a user or vendor has to know is which system discovery options manufacturers have chosen, write some custom code to translate between the different discovery options in use and voila, the devices can communicate.

Read On

MNA To Host AES67 Panel At InfoCOMM15

The Media Networking Alliance will hold a panel discussion Thursday, June 18, at InfoComm15 in Orlando, Fla., on the new AES67 audio-over-IP standard.

Entitled “How is AES67 going to change our industry?” the panel will be moderated by Rich Zwiebel, VP of systems strategy at QSC and chair of the alliance.

Other panelists will include:

  • Johan Wadsten, software product manager, Merging Technologies
  • Phil Wagner, president of Focusrite Novation
  • Ethan Wetzell, platform strategist and Bosch Communications Systems
  • Andreas Hildebrand, senior product manager for Ravenna technology.

Click to learn more about InfoComm15.

Calrec Audio Commits to AoIP Interface Support

Calrec Audio has committed support to AoIP networking by announcing its membership in the RAVENNA community. The company has entered into a partnership agreement with ALC NetworX, the company behind RAVENNA.Calrec

Calrec has committed to developing RAVENNA- and AES67-compatible AoIP interfaces for its range of audio consoles through the Hydra2 network.

“MADI continues to serve the industry extremely well, but we expect to see AoIP interconnections providing a more flexible and elegant replacement in the near future. AoIP offers greater capacity, flexibility and multicast possibilities, all on an infrastructure shared with other services,” said Patrick Warrington, technical director of Calrec Audio.

Patrick Warrington“The excellent work by the AES’s X192 committee in its publication of AES67, the AoIP interoperation standard, has given the AoIP project a huge boost,” said Warrington. “Now manufacturers can design interfaces that they are confident will work with other manufacturers’ equipment. ALC NetworX’s involvement in drafting AES67 means RAVENNA interfaces will be directly compatible with other AES67-compatible equipment.

“While non-proprietary AoIP solutions are commonly not able to offer the low latency, determinism, capacity and broadcast feature-rich audio networking that Calrec’s Hydra2 provides, we think that AES67 and its compatible brethren are a perfect companion technology for wider connectivity to third-party equipment in a broadcast facility,” he continued.

“RAVENNA, with its open technology approach and scalable performance capabilities, is a perfect way to implement a powerful and flexible gateway between Hydra2’s unsurpassed performance and AES67’s broader connectivity.”Ravenna

Calrec has also announced the development of Audinate’s Dante AoIP network interface, available later this year, which will provide 64 inputs and outputs to the Hydra2 network on a Gigabit interface.

Calrec said it also remains committed to the development of an AVB (Ethernet over IP) interface, announced last year. The company sees the benefits and applications of AoIP solutions and Ethernet-based AVB proceeding on separate tracks, with distinct applications for both technologies.