Installation Case

The renovation of the Victoria Hall in the Swiss city of Geneva has taken almost 9 months. The hall, which was built between 1891 and 1894 by Geneva-based architect John Camoletti, was renovated at a cost of around six million Euros. The Hall's name can be traced backed to Sir Daniel Barton, who as the British Consul at the time dedicated this magnificent concert hall, which is still famed for its excellent acoustics, to Queen Victoria (1819-1901). Even today the British classics label Decca still uses the hall for concert recordings because of its fabulous acoustics. The magnificent auditorium from the late Baroque period has now been rejuvenated, and the new stage has enough room to comfortably accommodate 125 musicians. The careful restorations have something to offer the audience as well: new seating arrangements provide the very highest level of comfort for 1835 members of the public, and state-of-the-art air-conditioning ensures good ventilation and a comfortable temperature at all times.
The crowning glory of this sumptuous concert hall is without doubt the painstakingly restored organ, a gigantic instrument that was destroyed by a fire in 1984 and then rebuilt by the Dutch organ-builder Van den Heuvel. The hall is able to boast many other examples of exquisite workmanship that add to the overall feel of magnificence. On the other hand, because the hall opens its doors not only to unamplified classical concerts but also to increasing numbers of jazz and world music events as well as auctions, it was inevitable that a top class PA system would be installed. The PA system is there quite simply to ensure excellent tonality whilst still meeting all other stringent quality standards.

Almost invisible: the discreet NEXO systems
The front area of the hall has 18 discreetly arranged loudspeaker systems manufactured by the French company NEXO(10x GEO S805, 4x GEO S830 and 4 x GEO CD12 sub-bass units), ensuring that the public loudspeaker system is acoustically balanced with a rich, detailed tone. Smaller NEXO PS8 speakers support the Geos in the form of delay lines to the galleries. At the back of the Hall a pair of NEXO PS8 systems (seven in each pair) can be used if necessary as front fills below the stage to provide sound to the first few rows.
The loudspeakers are regulated by NEXO controllers. For the large Geo systems, two digital NEXO NX242 plus and NXtention-ES4 EtherSound cards have been installed. The smaller PS8 front fills and delay lines are operated by four smaller NEXO PS8 Analogue TDcontrollers. A total of eight amplifiers supply the power for the NEXO loudspeakers. Before the audio signals reach the controllers, amplifiers, and loudspeaker systems, they pass through a Yamaha DME24N Digital Mixing Engine which functions as a digital matrix. The DME unit provides the interface between whoever is renting out the hall and the hall's own internal PA system. With the aid of the DME, the input signals can be processed via compressors and EQ, or delayed if necessary and routed to any type of loudspeaker system.
The technical virtuosity required to integrate this complex system invisibly within the Victoria Hall without sacrificing any acoustic richness could only have been achieved thanks to the work of Zapaudio. The company, founded in 1977 by René von Arx, has offices in Geneva and Winterthur. Zapaudio is one of the major retailers of Yamaha equipment in Switzerland, and also distributes other exclusive brands such as NEXO, AuviTran and Camco. In the Eighties the company concentrated on the rental and manufacture of flight cases; in the Nineties these activities were supplemented by sales and selected installation work carried out by René von Arx's new business partner, Frédéric Walder.

Frédéric Walder from Zapaudio
Mr Walder was kind enough to invite us to Geneva to give us a backstage glimpse of the fabulous concert hall and to talk to us about the fascinating way in which the DME24N is being used here. First of all Mr Walder, revealed to us the reason why he chose this Yamaha product.
"For us it was a natural choice to opt for a DME24N because for many years we have had a good working relationship with Yamaha. Yamaha's products are extremely reliable and the support provided is first-class. However, there are lots of other reasons too for choosing a Yamaha DSP Engine. In the case of Victoria Hall, we wanted to create a set-up that was completely reliable, entirely digital and as discreet as possible, without any unnecessary conversions that could impair the sound. Thanks to the switchable digital matrix in the DME24N we quickly arrived at our goal", adds Mr Walder. "Using an AuviTran expansion card, the DME24N has EtherSound capability", he goes on to explain. "This is extremely practical, because the building has EtherNet cabling and even NEXO's controllers are fitted with EtherSound expansion cards. Any user of the hall, e.g. a concert organizer, can select either an analogue or digital connection via EtherSound between the mixing desk and the hall's internal PA system."
If a digital connection is selected, it is very easy to feed the signal into the internal PA system using a single patch cable from an EtherSound-compatible mixing desk via the DME matrix and the Nexo digital processors, without loss. Thus, thanks to DME and EtherSound, Victoria Hall is now at the cutting edge of signal transmission technology. Huge unsightly and unreliable multicore cables are not necessary. Audio specialist Mr Walder, whose goal during installation work was to retain the unique atmosphere of Victoria Hall, has yet more reasons for choosing a DME:
"Of course, in such a large space as Victoria Hall, we couldn't install massive speaker boxes. But because jazz and world music concerts also take place on the stage, we achieved a blanket amplification effect using multiple delay lines. The small NEXO PS speakers in the galleries and to the rear of the hall are height-adjusted and delayed in such a way that the sound still seems to come from the front — and of course, there are no intrusive echo effects. The sound is therefore at the right volume throughout the hall and despite the hall's long reverberation time of 3.5 seconds (RT60), is still well defined. And with only a few clicks of the mouse, the necessary digital delays can be inserted in the signal path before the outputs, thanks to the easy-to-use DME Designer software."
A major benefit of the DME is its storage capability: "We pre-programmed different presets in the signal route, including the relevant compressor, equalizer and delay settings", explains Mr Walder. "The concert hall staff now only need to select the corresponding preset. For example, they can select ‘Speech’ when auctions are held, or ‘Concert’ when jazz events are held. Every press of a button has the effect of changing virtually all the settings of the entire system, including all routing and processor parameters. A technical engineer is not needed to operate the DME system or even the overall sound system — all that is required is a simple press of a button." Inbuilt security features also ensure that non-technical staff cannot inadvertently change the settings. Our ‘final’ question as to whether we had covered everything was laughingly answered by Mr Walder.: "No, I'm sorry, the DME still has other features. The DME has an internal signal generator that I would like to talk about. It can be routed via the matrix to all ports. Thus, it is possible to test the signal paths throughout the entire system in no time at all. It's very practical!" We are grateful to Mr. Walder from Zapaudio for this interesting and highly informative interview.