How to enable Spatial Sounds for your Holographic Application?

How to enable Spatial Sounds for your Holographic Application?

Spatial Sound expands the Mixed Reality (MR) experience beyond our visual experience. With Holograms appearing from the different directions and, by taking advantages of the spatial sound, as a developer, you can produce an immersive experience for your end users.  By default spatialize sound option is not available for the Audio source. Let’s see how we can get this done.

Enable Spatial Sounds for your Holographic Application

From the Inspector window, navigate to Audio Source, and by default, you will see the following settings.

Audio Source

If you are new to the holographic application development, you can follow my series of post on my blog – Holographic App Development Using Microsoft HoloLens and would highly recommend following the Microsoft Mixed Reality Design documents

HoloLens uses Head Related Transfer Function (HRTF) to bring the 3D floating sound using the direction and distance of the object. To use this, you need to enable the HRTF Plugin first.

From the main menu navigate to Edit -> Project Settings -> Audio, and select “MS HRTF Spatializer” from the “Spatializer Plugin” dropdown.

Enable HRTF Spatializer for HoloLens


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That’s it. Now once you go back to the previous Audio Setting, you will have the Spatializer check box available. Make sure, you enable this Spatializer Checkbox.

Spatialize Sound Enabled

In short, you need set the “Spatializer Plugin” to “MS HRTF Spatializer”. This will enable the Spatialize option available for Audio Source, you must select it.  Other than this, you have to ensure, “Spatial Blend” is set to 3D. And, there are several settings under “3D Sound Settings” for each Audio Source. You need to set them accordingly to your project and audio experience requirements. 

HoloLens Blueprints

If you are new to holographic development, you may find this helpful, and for detailed article follow my blog posts

Hope this helps.

Abhijit Jana

Abhijit runs the Daily .NET Tips. He started this site with a vision to have a single knowledge base of .NET tips and tricks and share post that can quickly help any developers . He is a Former Microsoft ASP.NET MVP, CodeProject MVP, Mentor, Speaker, Author, Technology Evangelist and presently working as a .NET Consultant. He blogs at , you can follow him @AbhijitJana . He is the author of book Kinect for Windows SDK Programming Guide.

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