Simultaneous visual and aural immersion is the linchpin of a true virtual reality experience— yet, until today, the limitations of the 3D audio technology used in VR/ AR programming have prevented this true immersion from being created, rendering a VR experience with too many reminders that true reality exists elsewhere. Using patent-pending dynamic HRTFs and other new technologies featured in Dirac’s Dynamic 3D Audio platform, Dirac VR removes one of the industry’s major barriers to a truly immersive VR/AR experience. You’ll no longer notice you’re wearing a headset.  

 

 

Groundbreaking Dynamic HRTFs

 

A major barrier to the truly immersive AR/AR experience is removed with the introduction of Dirac VR, featuring patent-pending dynamic HRTFs (head-related transfer functions) which take into consideration the isolated movements of the head in relation to the human torso.

If a phone rings to your left, the sound waves enter your left ear a fraction of a second before your right, then bounce off your shoulders and head in various ways, allowing your brain to localize the sound and instinctively rotate your head to face the source. This is reality. Yet, prior to the development of dynamic HRTFs, it couldn’t be correctly reproduced virtually. Previous solutions assume that the head and the torso rotate in tandem. Such failure to accurately reproduce dynamic head movements in virtual reality is one of the reasons why existing positional sound solutions don’t sound quite realistic.

 
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High-resolution HRTF measurements

 

The torso-head dilemma isn’t the only immersion limitation resolved by Dirac VR. Existing databases of static HRTFs lack resolution and suffer from measurement noise and errors. These shortcomings of existing HRTFs result in inaccurate positioning of audio sources and sound quality degradations. To create a more immersive audio experience, the current state of the art relies on “individualized” HRTF measurements of each listener — a time-consuming and laborious process which ultimately lacks scalability. Dirac VR utilizes a highly sophisticated HRTF measurement process that, when compared to existing approaches, is exponentially more free from noise and error. And, excitingly, when this measurement process is combined with dynamic HRTFs, the benefits of individualization become virtually immaterial and ultimately obsolete. Most importantly, the combination ensures the reproduction of much more accurate, natural, positional sound without sound coloration—resulting in true immersion for the listener. 

 
 
 
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Natural and realistic three-dimensional space

 
 

In virtual reality, if someone calls out from behind you in a church, with the right audio cues you’ll not only hear the audio coming from that direction, you’ll also recognize that you are in a church (not a bathroom or a long corridor). The reason for this is that each space has its own specific acoustical behaviors that color the sound, helping you identify where you are.

Using a proprietary 3D reverberation engine, Dirac VR realistically renders the critical aspects of a room’s unique acoustics to create a sense of a specific space and distance that mirrors reality. Using the same platform, Dirac engineers have successfully recreated the acoustical behaviors of the Gothenburg Concert Hall from inside a Volvo XC90—the winner of “Best Audio System – over £25,000” at the inaugural Car Tech Awards. 

 
 

Patented headphone optimization technology

When used in combination with Dirac HD Sound, our patented digital headphone optimization technology, Dirac VR creates the ultimate immersive virtual reality experience. No matter how well designed, all headphones suffer from one fundamental problem: they are mechanical devices, and all mechanical devices produce acoustical imperfections. A fact which is detrimental to virtual reality, where any acoustical shortcoming by the headphones can distract the listener and, ultimately, destroy the whole illusion.
Using leading frequency-domain and time-domain correction algorithms, Dirac VR enhances the audio performance of headphones by minimizing any coloration attributable to the headphone itself. As a result, a more balanced and transparent sound with richer details is achieved.  

 
 
 

Accuracy is everything

For positional audio, accuracy is everything. The more accurate it is, the closer it is to reality, and the more immersed the listener will feel. A drilling machine located far in front of you should not sound like a mosquito trapped in the back of your head. If a zombie appears at 7 o'clock, 2 meters off, and you’re able to identify it instantly using accurate audio cues, gaming would be much more fun. 

With Dirac VR, you can trust your ears and the illusion remains intact. Combining the Dynamic HRTFs and 3D reverberation engine with advanced digital headphone optimization technology, we deliver far more accurate positional audio than ever—convincing externalization, realistic sense of space, accurate acoustical characteristics of different audio objects, right distance and location, and more. 

 
 

Audiophile-quality listening for VR/AR gaming, movies, and more

 
 

Whether you're playing a new game, watching your favorite movie, listening to a live concert or taking a virtual tour at a space station, Dirac VR offers you an audiophile-quality listening experience. No muddy sound, and no

artificial spatial effects or poorly placed objects reminding you that the true reality is elsewhere. Everything sounds natural and realistic, with rich details confirming your place in an alternative world.

 
 

Efficient implementation for low CPU processing

As the leading provider of post-processed audio for the smartphone industry, we have a unique know-how when it comes to low power implementations of high-end audio technology. The processing and models used for Dirac VR have been optimized for extremely low CPU requirements, and high-resolution minimum-latency tracking of micro movements of the head. The technology is optimized for battery-limited mobile devices, while at the same time enabling the highest sound performance possible.