Category Archives: Meetings

October 18th Meeting: Wheatstone HD Audio Alignment and Other Tricks

Keeping your FM station’s IBOC digital audio time-aligned with your analog audio has been a source of frustration since digital was introduced. At one time, this meant manual adjustments until you could no longer perceive the difference, perhaps using a headphone with one stereo side in digital and the other in analog. Then along came separate boxes to attempt alignment, but that introduced another single point of audio failure into your system.

Wheatstone’s Mike Erickson, one of the country’s most renowned processor experts, comes to Chapter 36 to talk about the AirAura processor and how it addresses HD time alignment and other FM challenges with a correction input from a Belar monitor. He can also answer some of your processor set-up questions.

Join us Wednesday, October 18th at noon at iHeartMedia, 9660 Granite Ridge Drive, San Diego for lunch courtesy of Wheatstone and a presentation. Lunch and learn with us.

About Mike Erickson

Since 2010 Mike Erickson has been Wheatstone’s system and support engineer for their line of broadcast and studio processors. Before working at Wheatstone, Mike spent 15 years at CBS New York, the last 4 years as the chief engineer of WCBS FM.

September 20 Meeting: Ground is a Myth!

Ground is something you stand on, but in an electrical sense, the meaning is much less clear. When it comes to broadcasters and ground, things get really confused. We drive rods into the earth, but why? Let’s take a look at whether any of this makes sense, and what theory tells us about “ground”, and if it exists in any sensible way at all. We’ll talk about DC grounds, RF grounds, and even about gravity.
Join us Wednesday, September 20th, 2017 at noon at iHeartMedia, 9660 Granite Ridge Drive, San Diego. Chapter 36 will provide pizza for this great lunch ‘n’ learn session.

About Our Speaker

Kristen McIntyre, K6WX, has been interested in radio since she was about 5 years old.  She started in Amateur Radio in 1979 getting her ticket while at MIT.  Kristen has worked in many diverse areas from analog circuit design to image processing to starting and running an ISP.  She is currently working at Apple in Core Networking, and spent many years at Sun Microsystems Laboratories where she was researching robustness and emergent properties of large distributed computer systems.  She is a long time denizen of Silicon Valley and has worked at or consulted for many of the usual suspects.  Kristen is an active ham and loves to chase DX on HF with her Elecraft K2 which she built while visiting her mother in Florida.  She is an ARRL Technical Coordinator for the East Bay Section, president of the Palo Alto Amateur Radio Association, the Q&A columnist for Nuts and Volts magazine, and is active in many local clubs.  Kristen was recently inducted into the CQ Amateur Radio Hall of Fame.

July 19 Meeting at iHeart: Orban Processing

Bob Orban will teleconference in to discuss analog and digital radio audio processing, including techniques for processing bass (including subharmonic synthesis), the uses and pitfalls of de-clippers, use of multidimensional phase correction to minimize mono reception while minimizing multipath distortion, and use of parallel compression for pre-processing. He’ll also touch on loudness management of digital radio and streaming using both the BS.1770 and the Jones Torick (CBS) algorithms, with particular consideration given to the 2015 AES TD1004.1.15-10 “Recommendation for Loudness of Audio Streaming and Network File Playback” publication. Bob will show measurements assessing how effectively conventional radio-style audio processing controls loudness, and will include practical suggestions about loudness management, and will wrap up with a brief discussion of two recent Orban products for radio and streaming.

Members and guests are welcome to our monthly meeting Wednesday, July 19th at 12 noon at iHeart Media, 9660 Granite Ridge Drive in San Diego. Orban will buy pizza for the occasion. Continue reading July 19 Meeting at iHeart: Orban Processing

June Meeting: SSL, IP Audio and Their Console-less Mixer

Says George Horton of SSL:

Audio-over-IP solutions are now in regular use around the world and in a wide range of critical applications. The installed sound market has been relying on IP transport for many years already, and now many broadcasters are implementing facility-wide AoIP technologies. This presentation covers how we are have reached the current technologies and how they are evolving. We will cover the current alphabet soup of acronyms and standards and finish up with a real word example of the technology in use.

For attendees’ interest, there will also be a range of Network IO solutions and the new ‘Console without an actual console’- SSL TCR- Tempest Control rack. A solution for remote flypack productions or fully automated broadcast facilities.

Join us for our regular monthly meeting Wednesday, June 21, at 12 noon at iHeartMedia, 9660 Granite Ridge Drive in San Diego. SSL will pick up the tab for pizza. As always, everyone is invited.

About George

George Horton, Vice President Western Region, Solid State Logic. Originally hailing from Oxford England, the hometown of Sold State Logic and has been with SSL for 29 years. From building consoles to testing, servicing, installing, training and now the commercial aspects of the Western United States.

About SSL

From groundbreaking audio consoles to innovative software and hardware solutions, Solid State Logic has evolved to become the world’s leading manufacturer of analog and digital audio consoles and provider of creative tools for Broadcast, Music, Film and Live Sound professionals.

With more than 3000 SSL-equipped studios and facilities operational today, the excellence of SSL consoles is universally recognized for unrivaled sonic quality, superb ergonomics, outstanding automation and an international support infrastructure second to none.