Hospital Operating Theater

Audio System Requirements

  1. Operating room, control room and external VTC require echo-free audio conferencing among them.
  2. 2 exclusive modes of hands-free conferencing while in the operating room: “Headset mode”, or “Room mic mode”.
  3. 2 gooseneck mics and 2 boundary mics in control room connect to DSP via Dante™ network.
  4. Non-verbal signaling system between both rooms using a push-button wall panel in each area.
  5. Volume control, preset and privacy mute triggering within both areas.
  6. Secured comprehensive system control from within the control room.
  7. Automatic ducking of operating room music when the operator from the control room speaks.

Symetrix Components

QTY Description Notes
1 Radius AEC DSP with 8 dedicated AEC channels, 4 Line inputs, 8 outputs, and expansion card slot.
1 ARC-3 Capacitive touch wall panel controller with graphic display.
1 ARC-SW4e Programmable 4 push-button wall panel.
1 ARC-K1e Wall panel with 2 volume controls in the space of 1.
1 ARC-EX4e 4 push-button wall panel combined with ARC-K1e to create Modular ARC.
1 Composer Windows software – design & configure all items.
1 SymVue Windows runtime control interface software – generated from Composer.

Solution Overview

Requirement Notes
Echo-free conferencing among all areas The Radius AEC has dedicated DSP processing reserved exclusively for echo cancellation.
The ability to switch between “headset mode” or “room mic mode” in the operating room Two presets were created in the main routing matrix in Composer. These are easily triggered via the ARC-3 in the operating room and the SymVue panel in the control room.
4 Dante-enabled mics in the control room Audio-Technica ATND971 and ATND8677 Dante-enabled mics are natively supported in Composer, allowing for seamless integration.
Non-verbal signaling system A push-button wall controller in each room is used to trigger logic modules which control the LEDs in both ARCs, as well as the SymVue control screen.
Control of volume, preset-triggering, and privacy mutes in the system Accomplished with an ARC-3 in the operating room and an ARC-K1e with SymVue in the control room. All programmed using Composer.
Secured control of the entire system from within the control room A password-protected SymVue control screen generated within Composer.
Automatic ducking of operating room music The Radius AEC programmed from Composer with a Ducker module in-line with the operating room music.

Radius AEC

  • Dedicated AEC processing, with 8 AEC inputs, 3 aux inputs, 8 outputs.
  • Universal DSP building block with a 64×64 channel Dante network audio port.
  • Configurable input/output option card slot reduces total system cost.
  • Add an Analog Telephone Interface card, or a VoIP card for an all-in-one conferencing solution.
  • Industry-leading audio performance specifications.


  • 32 menus, each with up to 32 items for controlling basic audio functions or complex logic-based events including volume, preset and source selection, room combining and more.
  • Bright, crisp 256×64 pixel OLED display is graphic and multi-lingual capable.
  • Capacitive touch user interface with LED side lighting provides instant operational feedback.

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  • Modular user wall panel with four buttons that are programmed as momentary, latched or radio.
  • Well-suited for control of mute, source selection and presets.
  • Tri-color LEDs provide user feedback. LEDs and buttons may be linked or programmed independently.

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  • It looks like a single volume control but it’s actually two. Push the knob in to toggle between the two rotary encoders. An LED indicates the active control.
  • An 8-segment LED ladder shows the volume level.
  • Hardware lockout pins accommodate an installer supplied key switch.
  • Power and signal arrive and depart via CAT-5/6.
  • Supports “idle” mode for light-sensitive environments such as theaters.
  • Furnished with a standard, white, single gang Decora faceplate and splash resistant overlay.

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  • Modular user wall panel with four buttons that are programmed as momentary, latched or radio.
  • Well-suited for control of mute, source selection and presets.
  • Tri-color LEDs provide user feedback. LEDs and buttons may be linked or programmed independently.

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  • Composer is an award winning CAD program used to create site file designs perfectly suited to each and every application.
  • Management of all aspects of audio routing, processing, mixing, user control and security for Edge, Radius and Prism series DSPs and accessories.
  • Native configuration and control of select Dante third-party endpoints.
  • Over 600 DSP modules and dozens of control and logic modules.

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  • SymVue is a network-based application for Windows PCs, touchscreen PCs, and tablets.
  • Control screens are authored in Composer from which SymVue runtime versions are generated.
  • Important control parameters from one or multiple DSPs are easily consolidated onto user friendly screens.
  • Multiple and concurrent instances of SymVue may be deployed across a control network.
  • Parameter changes are always in sync between Composer, ARC Wall Panels, ARC-WEB, third-party controllers, and SymVue.

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System Hookup Diagram


Downloads and Links

Hospital Operating Theater – Composer Site File
Hospital Operating Theater – SymVue Windows File
Hospital Operating Theater – System Hookup Diagram
Hospital Operating Theater – Download Application Note
Questions? / Comments? – Symetrix Tech Support

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