SARA II – the premium rendering engine behind Astro Spatial Audio

The core of Astro Spatial Audio's object-based immersive audio solutions.
Extraordinarily powerful, it is quick to deploy and scalable for every environment.

SARA II Premium Rendering Engine

SARA II Premium Rendering Engine

Key Features

  • Minimum 32 configurable audio objects
  • Up to 128 output channels
  • Dante™ or Madi I/O
  • Robust 3RU rack-mount housing
  • Low noise cooling
  • A range of redundancy options
  • Web-browser based control
  • 2.8" TFT interactive touchscreen

To harness the potential of object-based 3D sound within the live entertainment industries, the highest standards must be met. Astro Spatial Audio has responded accordingly by walking away from limited FPGA-based signal processing. Instead, SARA II relies on a Linux-based CPU design, delivering huge benefits in terms of power, scalability and upgradability.

SARA II Rear View

Developed and manufactured in Europe, the SARA II Premium Rendering Engine occupies just 3U of a standard rack, offering up to 128 MADI or 128 Dante™ configurable network pathways at 48kHz/24bit resolution. All paths are assignable to at least 32 audio input channels that can be rendered to up to 128 independently processed sound source outputs.

Tablet GUI

Even with full CPU processing, latency can be guaranteed to be below 5ms. Control couldn't be simpler with browser-based access to an intuitive GUI, and simultaneous control from multiple devices, ranging from mixing consoles and DAWs to tablets and phones running either Android or iOS. In addition, the front panel of each SARA II boasts a 2.8" TFT LCD colour touchscreen with a number of different control options.

SARA II Front View

To ensure reliability, the SARA II rack-and-road-ready engine hosts several on-board redundancy options, while systems can be linked as required to form massive immersive experiences across vast spaces. Use of the Open Sound Control (OSC) protocol delivers interoperability with third party systems.

Typical system diagram for 3D Spatial Audio in a Live Application

Typical system diagram for 3D Spatial Audio in a Live Application

Technical Specifications

Audio and control
Audio inputs
32 standard (expandable)
Audio outputs
Up to 128 channels
Sample rate
24 bit @ 48 kHz
< 8 ms, incl. loudspeaker management
External control
Open Sound Control (OSC) for MIDI, RS232 and GPIO
Front panel display
2.8" TFT LCD color touch screen
Standard: MADI
1 x optical (SC) and coaxial (BNC)
Option: DanteTM
1 x RJ45 Gigabit Ethernet LAN port
Selectable internal / external (BNC)
1 x Gigabit on Ethercon Neutrik NE8
Maintenance only
1 x VGA, 1024 x 768 or higher, 2 x USB 3.0, 1 x RJ45 Gigabit Ethernet
16 GB
Internal storage
2 x 120 GB Solid State Drives
RAID 1 SSD (internal), optional parallel SARA II Engines
Power supply
Input voltage
100 – 240 Vac, 50-60 Hz, 6.3 A max
Max output
450 W
Neutrik PowerCon NAC3MPA-1
Redundant PSU, 2 x 500 W, 8 A with audible and visual warnings
19" rackmount, 3 RU
WxDxH 482 x 550 x 132 mm (19" x 21.7" x 5.25")
11.9 kg (26 lbs) plus cables
Operating system
Linux CentOS

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