Audio Over IP – New Developments and Directions for AES67

What: Audio Engineering Society (AES) Meeting, Central Indiana
When: 7:00pm – 9:00pm, September 27, 2018
Where: Sensory Technologies, 6951 Corporate Circle, Indianapolis, IN 46278

Josh Arnold and Mike Sims, from Attero Tech in Fort Wayne, will present an update on new developments around the AES67 AoIP standard. There has been surprisingly rapid market acceptance and uptake of AES67, and a number of industry groups and manufacturers in the Pro AV space are using the standard. Many are using a variety of device discovery and audio connection management protocols to extend the utility of AES67 past basic AoIP bridging towards more comprehensive AoIP solutions. We’ll talk about these efforts, demonstrate AES67 interoperability on some real gear, and give a sneak peek at some of Attero Tech’s AES67 roadmap.

Josh Arnold is Attero Tech’s AV Product Manager. He’s responsible for defining Attero Tech’s new products and product family strategies. Before stepping into his current role at Attero Tech, Josh designed hardware and firmware for both Attero Tech and OEM products. Josh was a Sales Engineer at Sweetwater Sound prior to joining Attero Tech.

Mike Sims is the Director of Marketing and Sales, and one of the founders of Attero Tech. He worked as a hardware design engineer and manager for Biamp, Lectrosonics, and Cirrus Logic prior to his time at Attero Tech.

You can use our usual Eventbrite link here to RSVP. It is completely free – the link is just so we have a good way to keep track of attendance.


June Meeting Announcement: Wood, Leather, Glue, and Metal: Ancient Techniques for Modern Pipes

What: Goulding & Wood Pipe Organ Builders factory tour and demo with Tom Nichols
  THURSDAY, August 23, 2018
Time & Places: 
 5:30 PM at Indiana Landmarks Center, 1201 Central Ave., Indy 46202 followed by move to nearby Goulding & Wood, 823 Massachusetts Ave., Indy 46204.
RSVP to:

Join us for a rare opportunity to visit a modern pipe organ factory here in Indianapolis. Tom Nichols, organist, musician, and associate with Goulding & Wood, will be our host/guide.

At the Indiana Landmarks Center we will see the restored Grand Hall (a former Methodist church sanctuary) and hear a demonstration that organ by Tom Nichols. Organ restoration by Goulding & Wood.

The factory tour will feature a current project – a rebuild of the 1928 two-manual 29-rank Möller organ for Irvington Presbyterian Church, which includes a new console and a vintage Tuba stop new to that organ.

Tom Nichols is the Director of Music Ministry at St. Luke Catholic Church on the north side of Indianapolis, a position he began in July 2013, and a representative of Goulding & Wood pipe organ builders, where he works in customer service.  Previously he served for 17 years as the Director of Music & Liturgy and principal organist at historic St. John the Evangelist Church in downtown Indianapolis (home of a Goulding & Wood pipe organ built in 1989). He has served as the special events organist for various diocesan liturgies at SS. Peter & Paul Cathedral in Indianapolis for 10 years, and is a member of the Indianapolis Symphonic Choir and the 16-voice Archdiocesan Chamber Choir Vox Sacra.  He was a featured performer at the 2007 national conventions of the Organ Historical Society (OHS) and the National Association of Pastoral Musicians (NPM).

Tom also spent three years as Dean of the Indianapolis chapter of the American Guild of Organists.  He is also active in the Central Indiana Chapter of the American Theatre Organ Society, where he has served twice as chapter president and has volunteered on the organ rebuilding and maintenance crew since 1995.  He also has a keen interest in tower bells and carillons. Tom was a certified passenger train conductor and locomotive engineer with the Indiana Transportation Museum Railroad from 2003-2016, which operated a former Nickel Plate Road line across Marion, Hamilton, and Tipton counties in Indiana.

He was a scholarship student at the Indiana University Jacobs School of Music in Bloomington, where he earned a Bachelor of Music Education degree in Choral/General Music Teaching and Organ.  His organ teachers have been Christopher Young, Faythe Freese, Robert Rayfield, Dale Caldwell and Charles Gardner. He’s a fan of the Indianapolis Colts . . . except for when they play his beloved Green Bay Packers.

Meeting Announcement – Indy Acoustic Research – March 23, 2017

Our next Central Indiana Section meeting will be Thursday, March 23, 2017, 7:00 PM, at the offices of Indy Acoustic Research, 6602 E. 75th Street, Indianapolis. Larry Marcus and his associates will host this meeting.

Indy Acoustic Research specializes in acoustic engineering consulting for leading manufacturers of cutting edge communications and consumer electronics products. IAR offers acoustic measurement, design, simulation, prototyping, competitive analysis, benchmarking, debugging, and tuning for “user interfaces” from VoIP telephones to Bluetooth satellite speakers to industrial ASR headsets to gaming headsets. IAR members trace their career beginnings to Bell Telephone Laboratories in Indianapolis (BTL-IN) which was co-located with Western Electric’s Indianapolis Works.  R&D Areas in which IAR members specialized include telephone receivers, microphones, operator headsets, telephone headsets, speakerphones, and interoperability compliance. BTL-IN officially closed in 1997, but the location and many employees continued essential R&D operations through AT&T, Lucent Technologies, MWM Acoustics and Harman International. IAR continues the BTL and MWM Acoustics traditions of excellence in acoustics and transducer design and laboratory test.

Details of the Meeting:

Meeting is at 7:00PM on 23 March 2017 at 6602 East 75th Street which is the westernmost of the three buildings at Heritage Park in Northeast Indy.  Enter via the south entrance (75thStreet side) and take the first right to the Conference Center where a short introductory presentation will start the meeting.  Afterward there will be a lab tour with demonstrations in the anechoic chamber and sound booth.  Meeting should last about one hour.

Please RSVP on Eventbrite:
Eventbrite - Indy Acoustic Research Meeting

Meeting — Surround Sound: Invented in Indiana — Jan. 10, 2017

An Evening with Peter Scheiber

When:  Tuesday, January 10, 2017, 7:30 PM

Where:  Jacobs School of Music, Musical Arts Center (MAC), Room 438

               101 N. Jordan Avenue, Bloomington, IN 47405

Did you ever wonder who, where, or when “surround sound” was developed?  Join us for this very special opportunity to hear a detailed history of surround sound with AES Life Fellow Peter Scheiber.  Here’s a preview:


Peter Scheiber was named a Fellow of the AES in 1972, but demonstrated an interest in audio and music from his early years in school.  When he was only fifteen, his ever-evolving home audio system included an extra overhead speaker, which derived its signal from a reverberation chamber he had constructed in his basement using a crystal microphone and loudspeaker.

As an undergraduate at Oberlin College, Peter switched from a planned major in physics to a major in music; during two summers, he studied bassoon on scholarship at the Boston Symphony’s Berkshire Music Center at Tanglewood.

Bitten by the “Toscanini bug,” he went to Chicago in 1957 at age 22 to study with Leonard Sharrow, principal bassoon of the Chicago Symphony, and former principal of the NBC Symphony under Toscanini.  Following a year as principal bassoon in the Ottawa Philharmonic, Peter moved to the Dallas symphony, where he remained for six years.  After a two-year stint as senior lab technician in instrumentation at Texas Instruments, which reconfirmed that music was indeed his first love, he began graduate studies at the Indiana University School of Music, where he built and filed for patents on “four-channel” matrix encoders and “logic” decoders.

In 1972, Electro-Voice and CBS were licensed for their respective “quadraphonic” systems under this technology.  In 1973, in his hotel suite at the AES Convention in Los Angeles, Peter demonstrated his own decoder for SQ-encoded program, using cancellation logic in four independent frequency bands, instead of the single-band, gain-riding technique then being implemented by CBS.

About a year later, at an informal “shoot-out” held at CBS Laboratories in Stamford, CT, the attendees, who included SQ engineering-team leader Dan Gravereaux, and Larry Keyes, chief quadraphonic mixer for CBS Records, declared Peter’s new single-band decoder, which used attack-sensing, continuously-variable-speed logic, to be superior in positional stability and sound quality to CBS’s own, never-marketed cancellation decoder, the “paramatrix.”  In 1977, a CBS-sponsored demonstration of the Scheiber SQ-optimized prototype “360° Spatial Decoder” moved Leonard Feldman to write, in Rolling Stone, separation was absolute and complete (you could even stand outside the area of the four loudspeakers and still distinguish easily among the sounds coming from the different speakers).  Nor was there any sense of ‘pumping’ or ‘breathing’ so common to earlier full-logic decoders.

In late 1983, Peter was approached by Jim Fosgate, who was looking for an alternative to the “T.A.T.E.” directional enhancement chips used in his logic decoders, at that time optimized for CBS’s “SQ” matrix.  Peter provided Jim with a new decoder circuit, and, through 1989, made numerous trips to Utah for design sessions and related technology transfer.

Features of the circuit included a “Panorama” mode providing surround reproduction of two-channel music program, years later to be implemented under the same Scheiber-coined name in Pro Logic IITM.  The first commercial result was the 1985-86 Fosgate Model 3601 “360º Space Matrix,” named after the 1977 Scheiber “360° Spatial Decoder.”  The 3601 was probably the first  home-use logic decoder for Dolby Surround.

Also in 1983, Peter licensed Dolby Labs to use his matrix/logic technology in motion picture soundtracks and theaters.  The following year, Peter granted to Dolby a sublicensing right for non-logic, basic-matrix, consumer decoders (the only kind they were interested in at that time).   In 1986, the consumer-use right was amended to add logic, and in 1987, Pro LogicTM was introduced.

In 1988, Scheiber and Fosgate signed a new agreement with a “Co-operation” provision under which the parties would co-operate toward realization of Scheiber’s designs for a Dolby-compatible matrix system with improved logic.  In 1990, Fosgate left the relationship with Scheiber.  In 2000-01, Dolby introduced Pro Logic IITM, which it has described as a dramatically improved, updated matrix surround system, based on the principles used to develop the original Pro Logic decoding back in the 1980s, and featuring “Panorama” surround reproduction of two-channel music program.

In 2003, Dolby, Fosgate and Scheiber shared an Emmy Award for Development of Surround Sound for Television.  The May, 2004 issue of the Journal of the Audio Engineering Society, reporting that event, noted that Scheiber’s continuously-variable-speed logic and stereo surrounds were later reintroduced in Pro Logic II.

Meeting — Live Sound for a Major Musical Show and a Holiday Dinner — Dec. 19th

When/Where:  Monday, December 19, 2016, 4:00 PM @ Hilbert Circle Theater followed by Dinner at Shapiro’s ~ 5: 30 PM.

Join us for a hands-on talk with Alan Alford, audio engineer for the Indianapolis Symphony Orchestra, as he explains the details and challenges for the ISO’s 31st annual Yuletide musical production.  Among the challenges of this production is the handling of over 40 wireless microphone systems.  Our time with Alan will be from 4:00 – 5:00 PM, in the main house of Hilbert Circle Theater.

There are two Yuletide productions that day, one at 2:00 PM and the other at 8:00 PM.  Josh Kaufman (from The Voice) is this year’s host.  You may wish to attend one of these (your option) in order to have a greater appreciation for the magnitude and complexity of the task of handling live sound for this major production.  Because of unknown schedules, we are not holding a block of tickets; that is, you must purchase your own ticket(s), available online at  HCT is located at 45 Monument Circle, Indianapolis.  Parking is available in the adjacent garage (off N. Pennsylvania Street) or nearby Circle Center.

Immediately following we will proceed to the nearby Shapiro’s, 808 S. Meridian, for a holiday dinner.  You cost for the dinner will be only $5.00, with the balance being subsidized by our Section.  Our treasurer, Phil Hodson, will take your $5 share before paying the total bill.
Eventbrite - Central Indiana AES December Meeting
Eventbrite - Dinner at Shapiro's

Meeting — Talk & Tour: Azmyth Recording Studios & School of Music Technology


Date: Thursday, April 14, 2016, 7:00 – 9:00 PM

Location: Azmyth Recording Studios, 5210 E. 65th Street, Indianapolis, Indiana 46220

Talk & Tour: Azmyth Recording Studios & School of Music Technology – the oldest operating recording studio facility in Indiana. Ryan Adkins and staff will present a current look at the local music recording business and a tour of their facilities.

** Click on the following RSVP if you plan to attend – the earlier the better!

Eventbrite - AES - April 14 at Azmyth Recording Studios

Talk & Tour:  Azmyth Recording Studios & School of Music Technology – the oldest operating recording studio facility in Indiana.  Ryan Adkins and staff will present a current look at the local music recording business and a tour of their facilities.
Thursday, April 14, 2016, 7:00 – 9:00 PM
5210 E. 65th Street
Indianapolis, Indiana 46220



Meeting — Wireless Mics for a Major Theater Production — April 2, 2016

Date: Saturday, April 2, 2016, 12:00 PM – 2:00 PM

Location: IU MAC (Musical Arts Center), 101 N. Jordan Avenue, Bloomington, IN 47405

Note:  Start time for this meeting is Noon

Guest audio engineer Bryan Delaney will discuss techniques and considerations in using wireless microphones for the large- scale production of the musical Oklahoma at IU’s Opera Theater.

Bryan Delaney is a sound designer and engineer based out of Greenville, SC. He is a 2006 graduate of the Indiana University Jacob’s School of Music, earning his Bachelor’s of Science degree in Recording Arts. Specializing in theatrical sound design and concerts, he has designed and mixed in many halls throughout the country. His regional credits include shows for: The Peace Center for the Performing Arts, Virginia Opera, Flat Rock Playhouse, Walnut Street Theatre, American Repertory Theater, North Shore Music Theatre, Milwaukee Repertory Theatre, Stoneham Theatre, House Theatre of Chicago, Lookingglass Theatre Company, and Steppenwolf Theatre Company. In 2009, he took over as the Production Sound Engineer on the revival tour of “Sweeney Todd.”

Bryan is currently the Head of Audio at The Peace Center for the Performing Arts in Greenville, SC. The Peace Center is a multi-venue performing arts facility that hosts both national and international touring acts, as well as many local resident companies. The flagship of the facility is its 2100 seat concert hall; additional performance venues include the smaller 500-seat Gunter Theatre; 1300 seat outdoor amphitheater; Genevieve’s Bar and Lounge; and multiple studio and educational rental facilities. The programming at The Peace Center includes everything from 1st National Broadway tours to live televised Presidential debates, and everything in between. Bryan oversees the daily operations of the sound department and advises on capital upgrades and improvements. In his spare time, he enjoys designing shows for regional theaters and mixing concerts. He is a proud graduate of IU and is excited to return and share this experience with the faculty and students!

** Click on the following RSVP if you plan to attend – the earlier the better!

Eventbrite - AES - April 2 at IU MAC

Meeting – Revisiting Clowes Hall: Upgrades for Sound, Acoustics, Noise Performance


Date: Wednesday, January 20th, 2016. 6:45 PM

Location: Clowes Hall (Butler University campus, 46th Street) Indianapolis.

Parking: Plenty of parking is available in a brand new garage directly behind Clowes Hall and the Schrott Center. Enter off Sunset Ave. just north of 46th Street.

Entrance: Please enter via the northeast door (closest to the parking garage) – there will be a sign on door. We will meet on stage.

Note:  Start time for this meeting is 6:45 PM

Clowes Memorial Hall, celebrating 50 years, is a multi-purpose performing arts facility that serves Butler University and the greater Indianapolis community. It was once THE Indy Concert Hall and hosted Eric Clapton and Cream in 1967, as well as the ISO. Its programming has migrated over 50 years from symphonic originally, to more pop and road show use. This necessitated changes in acoustics and sound systems as a phased plan, now completed. Clowes Hall is now one of only a few performing arts centers in the region with a complete “LCR” (left/center/right) theatre sound system. It is optimized with acoustics driving the design. A new L-Acoustics array was specified and installed.

Our presenter will be David Wright of Wright Consulting Associates, now a part of a national engineering firm, KJWW Engineering Inc. David will review how design steps were prioritized with budgets and how acoustics were addressed before any sound system or product could be designed. If time allows, we also plan on doing a relative calibration for attendees’ SLM meters, as a field exercise. Bring your portable measuring mic and calibrators if you have one!

Our host at Clowes Hall will be Ernie Yezzi, Sound Technician/Technical Stage Crew.

** Click on the following RSVP if you plan to attend – the earlier the better!

Eventbrite - AES - January 2016 Meeting at Clowes Hall

Meeting: Postal Recording Studio Tour – June 25, 2015



LOCATION:  1144 S Belmont Ave, Indianapolis, IN 46221

This was a rare opportunity to see a fully-functional analog and digital recording studio in operation.  Host Jake Robinson gave us a tour of Postal Recording and, with the assistance of some local musicians, provided an opportunity to compare the sound of analog and digital technologies.

Meeting Report – February 2013 – Central Indiana Audio Student Workshop

Keynote speaker Konrad Strauss addressing a great early-morning crowd.On February 16, 2013 the Central Indiana Section of the Audio Engineering Society hosted the Second Annual Central Indiana Audio Student Workshop. The event was hosted by Section Chair Fallon Stillman, and coordinated by Workshop Advisor Kyle P. Snyder with great assistance from the Executive Board of the Central Indiana Section as well as the faculty and staff of the Indiana University Department of Recording Arts. The Central Indiana Audio Student Workshop 2013 was held on the campus of Indiana University Bloomington, in the Department of Recording Arts studios and related facilities.

Like other regional events, the Central Indiana Audio Student Workshop was modeled like a mini-convention. Our goal was to provide an intimate learning environment, open to anyone interested in audio, including local professionals, university students, and high school students. The Workshop provided attendees the opportunity to improve their skills with some of the best in the business, who presented on topics in recording, mixing, live sound, and acoustics.

Marc DeGeorge of Solid State Logic discussing digital technology

Marc DeGeorge of Solid State Logic discussing digital technology.

Click for more pictures

We also wanted to provide the Workshop free of charge, to give students of all means equal access to the audio instruction we were providing. Also, not only did we want to provide high-quality instruction for free, but also we wanted to incentivize attendance with useful giveaways from sponsors. Finally, we wanted to ensure that an acceptable student to teacher ratio was achieved, so that students felt less like they were part of a crowd and more like they were in a small classroom where they could ask questions.

Our pre-registration topped out at over 250, and we saw physical attendance at over 200 including numerous walk-in’s, reaching a group of audio students and professionals from every corner of the state and many from neighboring territories, who were appreciative beyond words. We couldn’t have been more pleased with how the event turned out.

For additional information on the event including sponsors, posters, artwork, schedules, and much more please visit the official event site.

Additionally, the official event report is available for download (pdf).