ZYLIA - 3D AUDIO RECORDING & POST-PROCESSING
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Zylia is building a future of immersive and fully navigable audio for Virtual Reality by creating an installation of 53 3rd order Ambisonics microphone arrays

12/6/2019

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Zylia introduced a six-degrees-of-freedom (6DoF) multi-level microphone arrays installation for navigable live recorded audio.

​What does it mean? We are working on technology that gives people the possibility to listen to a concert or live performance from any point in the audio scene.  With our technology you are able to record an audio scene from different points of the space – the center of the stage, from the middle of a string quartet, audience, or backstage. Audio recorded in such a way can be used together with virtual reality projections and allow the user to freely move around the space giving the natural experience of audio scene and the possibility to listen to it from different perspectives.
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6DoF installation and test setup
The first step of test recordings was to install 9 3rd order Ambisonics microphone arrays on the same level and record musicians playing their performance. Such an approach allowed the listener to move around those 9 points and listen to their music from different perspectives. However, microphones placement on a single level introduced limitations in terms of audio resolution in the vertical plane.

Since we like challenges we decided to increase the number of microphones to 53 and build an installation on five different levels. It allowed us to freely move in every direction of the recorded scene in a truly immersive experience. The second idea behind this test setup was to check the limits of Ambisonics recordings in order to achieve a fully navigable audio scene. We placed the microphones arrays densely in the recorded scene and we received a spatial audio image of very high resolution.
Technical aspects:
We used 53 19-channel mic arrays – which gave us 1007 audio channels recorded simultaneously. Microphones were connected to a USB hub and the recordings were operated via a single laptop.

The audio recorded from each microphone array was converted to 3rd order Ambisonics using our ZYLIA Ambisonics Converter plugin (it can be done in real-time or offline).  After the recording, we used our interpolation software. This software is a MaxMSP plugin, that generates 3rd order Ambisonics spheres based on the signal from all microphones in the position you are at the moment. When you put your headphones and VR headset and move around the space the algorithm in MaxMSP takes your position and interpolates 3D sound in the position you are at the moment.
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We used 3rd order Ambisonics microphone arrays. It is important because the higher the order the more precision we get in the spatial localization of sound around the listener. We are able to recreate the sound with a very high spatial resolution which influences the audio quality - an extremely important aspect for listeners.

With this simple approach, you can record the natural audio scene for your VR/AR productions and use it right away without complicated work-flow in post-production. You can record live events and stream audio directly to the listener giving him the possibility to freely choose the position in this real-time recorded space for an ultimate immersive audio experience.
Application:
Cinematic trailers for VR, audio for games, live performances recording, domes with multi-loudspeakers installations
The system is available for creative teams of audio engineers and sound artists as a ZYLIA 6DoF VR/AR Development Kit (https://www.zylia.co/zylia-6dof.html). 
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  • Solutions
    • Live rehearsal recording
    • 360 VR recording
    • Field recording
    • Audio recording for Dolby Atmos
    • Navigable Audio for VR
    • 3D audio streaming
  • Products
    • ZYLIA MUSIC
    • ZYLIA PRO
    • ZYLIA 6DOF
    • Software >
      • Applications >
        • ZYLIA Studio
        • ZYLIA Ambisonics Converter
        • ZYLIA Streaming Application
        • ZYLIA 6DoF Recording Application
      • Plugins >
        • ZYLIA Studio PRO
        • ZYLIA Ambisonics Converter Plugin
        • ZYLIA 6DoF HOA renderer
    • Hardware >
      • ZYLIA ZM-1 microphone
      • ZYLIA ZM-1S microphone
      • ZYLIA ZR-1 Portable Recorder
    • Technology Licensing
  • Support
    • Get Started
    • Register
    • Downloads
    • Tutorials
    • Help Center
    • Contact support
  • Community
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    • Testimonials
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