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Dolby Atmos for all

28/12/2021

Dolby Atmos for all posted: 28/12/2021

by Bernhard Herrmann

The floating stage in Bregenz, in the foreground the microphones for the audience atmosphere

Opera Rigoletto as Arte-showcase for UHD HDR and Dolby Atmos

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The Swiss technology service provider tpc produced a recording of the opera Rigoletto from Seeb hne Bregenz in 2019 - also as a showcase for a UHD HDR production with Dolby Atmos, which is now accessible via HbbTV. Reason enough for Bernhard Herrmann to take a look at how the recording was made and what the state of things is with Dolby Atmos.

The globally active technology company Dolby Laboratories brought Dolby Atmos to cinemas back in 2012. Two years later, Dolby Atmos made it into living rooms with the home entertainment products available, and in 2016 there was the first smartphone that supported Dolby Atmos via headphones. New UHD televisions are currently offering integrated Dolby Atmos speakers. Dolby Atmos is a sound format for mixing and reproducing sound in 3D space. Sound objects with metadata can be placed and moved to create an immersive and realistic soundscape that puts the listener right in the middle of the action , explains David Ziegler, Senior Content Engineer at Dolby Germany. Dolby Atmos can be experienced in the cinema, at home, on smartphones and in 2022 also in the car, adds Arnd Paulsen, Senior Manager Broadcast & OTT Eco-System at Dolby Germany. Listeners hear moving audio in live event broadcasts, on-demand and linear television, streaming and as a hybrid delivery.

SOUND MIXING FOR DOLBY ATMOS

The sound mixing for Dolby Atmos is less rocket science than a creative process for qualified and experienced sound engineers. We offer tools and products for content creators, sound engineers, content distributors, providers of head-end solutions and device manufacturers, explains Arnd Paulsen. The Dolby Multistream Decoder MS12 offers TV, set-top box and IC manufacturers a single package solution for decoding Dolby Digital Plus, Dolby AC-4 and premium audio content worldwide for transmission via radio, file-based services, OTT / VOD -Services and Pay TV. Support from Dolby Atmos makes products fit for the next audio era and gives broadcasters and OTT operators the flexibility to offer the best home entertainment experiences now and in the future.

As a key component of the Dolby audio system, Dolby AC-4 offers new immersive and personalized sound experiences. It combines state-of-the-art bandwidth efficiency and powerful playback adjustment to provide the optimal listening experience no matter where the viewer wants to hear it. Working in ETSI, ATSC3.0, DVB and HbbTV specifications, Dolby AC-4 is the next generation audio solution for broadcast and IP content delivery. With Dolby Atmos technology, any voice, instrument or sound can be placed in the room , adds David Ziegler.

Sound engineer Markus Brockmann during the recording in Bregenz

SHOWCASE OPERA

The Swiss production company tpc, which in the meantime re-merged with the SRF, had the contract to realize the opera Rigoletto on the Seeb hne as a live broadcast for Unitel, ORF, SRF and ZDF at the Bregenz Festival in Austria in July 2019. The first challenge was that the opera took place on the floating stage and the orchestra played in the Bregenz Festival Hall in front of it, says Markus Brockmann, Team Leader Audio External Transmission and Sound Engineer for Dolby Atmos at SRF.

The UHD1 HDR from tpc / SRF with a total of 20 UHD cameras was used for the TV production. The sound production in Dolby Atmos took place with the help of the existing miking for the existing 5.1 live transmission from the main control room of the OB van, the UHD-HDR recording in Dolby Atmos took place in the additional control room. A senior sound engineer and two other sound engineers worked on this in the main control room of the OB van. Two sound technicians took care of the miking for the live broadcast.

The orchestra in the Bregenz Festival Hall was equipped with a total of 48 microphones. A Decca tree in 5.0 configuration served as the main microphone. In addition, all registers were removed with support microphones. In addition, four heights microphones were used in the stage building above the orchestra to reproduce the height information in Dolby Atmos. The sound signal was sent via a fiber optic cable to the sound system mixer on the Seeb hne.

The eleven soloists on the Seeb hne were each equipped with two wireless pocket transmitters and two soloist microphones. Eight microphones were used for the audience atmosphere. One audio signal path led to the sound PA, the other signal path ended in the audio control room in the OB van. On the main mixer, a Stagetec Avatus console, 120 audio tracks were mixed in 48 kHz. The second sound control room was used for the Dolby Atmos mix with another Stagetec Avatus mixer. The aim was to create a homogeneous feeling of space with the help of two Lexicon PCM96 Surround Engines, multi-track recording in 128 channels of all individual signals and mixing in Dolby Atmos including a submix on Merging Technologies Pyramix, explains the sound engineer. Dolby provided a Dolby DP590 for rendering, a Dolby DP591 for encoding and a Dolby DP580 for decoding. An RTW TM9 with an Immersive Sound Analyzer license was used as a measuring device. The Dolby Atmos mix was carried out with the defined groups with existing submixes from the main control room, such as for orchestra and audience atmosphere as well as the individual soloists and the additional atmospheric microphones for Dolby Atmos by two sound engineers.

With this experienced audio production staff and the defined workflow, the UHD HDR live broadcast with Dolby 5.1 sound and mix for Dolby Atmos has proven itself. The Dolby Atmos mix produced in B
LINK: https://www.live-production.tv/news/shows/dolby-atmos-all.html...
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