imgWashington D.C. (February 26, 2013)–Maryland Sound International (MSI) employed two Optocore Networks when it supplied the main audio system for President Barack Obama’s second presidential inauguration on January 21, 2013, marking the third presidential inauguration in a row for which MSI has chosen Optocore equipment for audio distribution.

The Front-of-House position sat nearly 2,000 feet from the last speaker tower, so MSI and audio designer Patrick Baltzell chose Optocore Network technology in order to drive the signal chain directly from the Yamaha PM5D FOH mixing console using Optocore YG2 Yamaha cards that were connected with redundant fiber cabling to the locations of the loudspeaker processors and amplifiers. This provided MSI with lossless digital transmission in order to properly transport the audio over such a long distance transmission path.

The main Optocore Network consisted of one YG2 card in the Yamaha PM5D FOH mixing console connected to an Optocore DD32 networked AES/EBU device on stage right and another DD32 on stage left. Each DD32 was connected to an Optocore X6P-8/8 analog converter and a Dolby DLP loudspeaker processor via AES. The X6P converters gave MSI the ability to feed all the devices that were not AES and/or not driven through the Dolby processor units.

The second Optocore Network consisted of one YG2 card in the PM5D connected to an Optocore DD32R-FX networked AES/EBU device at delay zone 1 (700 feet away) and another DD32R-FX at delay zone 2 (1500 feet away). Each DD32R-FX was connected to an Optocore X6P-16IN analog converter and a Dolby processor via AES. Both networks featured redundant fiber connections.

“It is my role to help the FOH engineer tune the system, so having access to all parts of the system at all times in order to make changes without my needing to leave the FOH position is invaluable,” says Art Isaacs, project manager, MSI. “The X6P-16IN converters gave us the functionality to run measurement microphones from multiple city blocks away back to the FOH position. Using the Optocore system proved itself to us in many ways. The sound system was extremely quiet due to the all-AES based drive system. Ethernet access to all of the online devices proved extremely helpful and provided great flexibility. I can only hope that in 2017, we can continue to work with Optocore systems to further enhance the sound system.”

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