3D-Audio

ORTF-3D on VR glasses - Download the app

ORTF-3D is an ideal microphone setup for VR and 360 video, as it is capable of recording a spacious ambience. It can be rendered quite easily with the help of the suitable tools.

That's how we did it:

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3D Audio

3D-Audio offers a fantastic chance for spatial sound reproduction.

3D-Audio includes fundamentally different reproduction principles: physical sound field reproduction (WFS, HOA), 3D-Stereo (Dolby Atmos, Auro3D), Binaural as well as mixtures and combinations between them. 

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The "Uncanny Valley" of 3D-Audio

It is a phenomenon, that all of a sudden recording techniques are popular again that seamed to be dead (for good reasons). With the rise of 3D-Audio, 1st order Ambisonics recording techniques are in the game again and everything we learned about them in the last 40 years seems to be forgotten...

Why didn't we like coincident techniques too much for certain applications, in particular for spatial recording? Yes, it's because they sounded boring in comparison with spaced techniques. The reason is simple: the signal was quite Mono, i.e. the signal separation was poor. Now, as we're adding one more dimension to the stereo sound field, this is even more disadavantageous.

Good old Stereo with the laws of level and time differences can be much better than 1st order Ambisonics, because it creates sufficient signal separation which can enable a proper imaging and a wonderful spatial quality.

Find my recent talk about 3D techniques with the analogy of the "Uncanny Vally of 3D-Audio" in these slides. Read more on the comparison between Stereo and 1st order Ambisonics in this article: "ORTF-3D": A microphone setup for 3D Audio and VR ambience recording

"ORTF-3D": A microphone setup for 3D Audio and VR ambience recording

Development and application of a stereophonic multichannel recording technique for 3D Audio and VR

by Helmut Wittek, 2016

Fig. 1 above: ORTF-3D arrangement, in a windscreen with the cover removed

pdf of this article

Recording engineers who work with 3D sound face a difficult task when choosing a suitable recording technique. The number of channels is greater than with playback systems that operate only in the horizontal plane, so the complexity increases as well.

When a customer demands 3D audio rather than conventional 5.1 surround it may be tempting to apply solutions that are overly simple. But when a 3D recording has been made well, using a suitable recording technique, the advantages are impressively audible.

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