Planar Spatial Audio

While recording using both lenses, your camera can use all four camera microphones to record planar spatial audio. Planar spatial audio records location-specific sound from the 360-degree plane around you. It can precisely represent the location of a sound to the front, back, left, or right of the camera, or any place in between. While playing the video using a compatible player, the audio perspective follows the video perspective when you turn to view different parts of the video. Spatial audio is especially effective when viewing a video using a virtual reality headset.

The following technical specifications are provided for users performing advanced video and audio processing on the recorded file.

The camera uses Ambisonic B-format encoding to record spatial audio into four audio channels in the MP4 file.

Channel

Encoded information

Channel 1 (W)

Audio from all directions.

Channel 2 (Y)

Information about audio to the left and right of the camera.

Channel 3 (Z)

Information about audio above or below the camera.1

Channel 4 (X)

Information about audio to the front or back of the camera.

1 Because the VIRB® 360 microphones are located on the front, back, and both sides of the device, channel 3 (Z) is intentionally left blank to meet the spatial metadata specifications of the video players. Sounds above and below the camera are captured in channel 1 (W), but only the sounds coming from the front, back, and sides are rendered with the full spatial audio effect during playback.
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