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Auditoria Magazine
Acoustics

L-ISA helps create operatic sound outdoors

Izzy KingtonBy Izzy Kington27th September 20215 Mins Read
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A backstage view of the performers and L-Acoustics loudspeaker arrays supplied by Firehouse Productions
A backstage view of the performers and L-Acoustics loudspeaker arrays supplied by Firehouse Productions

This summer in Cincinnati, Ohio, the Cincinnati Opera held its Summer at Summit series in an outdoor setting, a choice driven by the pandemic. To create a grand opera theatre sound, the organisers turned to L-ISA immersive technology provided by L-Acoustics.

The series, held from 11 July to 1 August at Summit Park, included performances of Carmen, Tosca and The Barber of Seville. It featured the talents of guest artists the Cincinnati Symphony Orchestra and the Cincinnati Opera Chorus.

Summit Park hosted Cincinnati Opera’s socially distanced outdoor productions of Carmen, Tosca and The Barber of Seville in July and August 2021
Summit Park hosted Cincinnati Opera’s socially distanced outdoor productions of Carmen, Tosca and The Barber of Seville in July and August 2021

A system co-designed by Jonathan Burke, who directs the sound design programme in the School of Theater, Film and Television at UCLA, incorporated the best of L-Acoustics’ broad range of technologies. There were 60 Kara II enclosures configured as five arrays of 12 enclosures each, all flown from towers and the stage canopy, as the Scene system. The arrays benefited from L-Acoustics’ Panflex horizontal steering, to provide coverage over the entire seating area, extending 450ft (137m) from the stage.

In addition, 16 KS28 subs were arrayed in a centre arc on the ground, while nine Kiva II enclosures were deployed as frontfills along the leading edge of the stage, placed atop the subs. Finally, six Syva medium-throw colinear source speakers were mounted on light poles at the rear of the seating area and, using L-ISA Room Engine functionality, created the rear-surround array. All components were provided by Firehouse Productions.

“This was a unique deployment of L-ISA,” said Marcus Ross, director of applications, Americas, at L-Acoustics. “Due to weight restrictions on the outdoor stage, we had to disperse the Scene arrays wider than usual, instead of over the stage. It’s not how we normally configure speakers for L-ISA, but what this deployment did is show how flexible the system really is. And it was also able to overcome a number of other challenges in this situation, including the fact that the seating was so widely dispersed – the first row was 50ft [15.2m] from the stage!”

Sound designer and FOH engineer Jonathan Burke at the productions’ DiGiCo SD10 mixing console and L-ISA Controller display (upper left)
Sound designer and FOH engineer Jonathan Burke at the productions’ DiGiCo SD10 mixing console and L-ISA Controller display (upper left)

The mission was to create an operatic experience outdoors. “We looked at how to add surround speakers in an inconspicuous way so that the illusion of reverb was built into the sound system from the start,” said Burke.

Burke spent a day at L-Acoustics’ Westlake Village studios familiarising himself with L-ISA and with mixing object-based live audio before collaborating with Ross and L-Acoustics application engineer Jordan Tani on the system design for the Summer at Summit series. “I’ve spent some time working with immersive audio systems such as Dolby Atmos, but this is the first time I was going to mix immersive sound live,” said Burke. “It really is a new and wonderful world.”

Burke added that he enjoyed being able to broaden the sound field through the L-ISA Processor, creating an enveloping sonic landscape for the audience, yet still able to precisely place each instrument in that sound field exactly where it actually was on stage. “The spatialisation of the orchestra was spectacular – the harp, tympani, and other elements were exactly where they were supposed to be, and the detail of each instrument was as if you were standing next to them,” he said. “We could also get creative: we could widen out the chorus, for instance, and move other elements a bit upstage or downstage if we wanted.”

Jonathan Burke says that the L-ISA Room Engine emulated a theatrical room environment so authentically that the opera vocalists were all amazed
Jonathan Burke says that the L-ISA Room Engine emulated a theatrical room environment so authentically that the opera vocalists were all amazed

But he and the cast saved their greatest praise for the L-ISA Room Engine functionality, used to emulate a theatrical room environment, to the approval of opera vocalists. “They said they really felt as though they were in an enclosed space, with reflections off of walls,” said Burke. “There was no vocal monitoring, no foldback – they really felt supported by the ‘room’. On shows like this, I’ll usually have reverb on a fader I can bring up as needed, but on these shows, we needed none of that. The Room Engine created all the ambience we needed and wanted.”

“Plus, the gain-before-feedback was great,” Burke continued. “We didn’t run our levels particularly loud, but the system gave us plenty of output and not a hint of feedback. Since no two objects summed together like a traditional system, we were able to get amazing detail and gain with minimal EQ because each object has its own unique relationship to the speakers and within the sound field. This was a real eye-opener for me. L-ISA made everyone feel like they were truly in a theatre. I even began to creep in the sounds of the orchestra about 10 minutes before the show began, so you could hear everyone tuning and warming up in the same sound environment, just as you would hear in a concert hall. It was all quite incredible.”

Images: Philip Groshong, Cincinnati Opera

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Izzy Kington

Izzy became editor of Auditoria magazine in 2018, having previously served as assistant editor on the title earlier in her career. She is also the editor of Business Jet Interiors International and Railway Interiors International. Over the course of a decade as a business-to-business magazine editor, Izzy has covered everything from airline catering to car safety technologies, autonomous vehicles and business aviation airports. Outside of work, Izzy loves watercolour painting, live music and travel.

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