FoaDirectY:
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FoaDirectY
ExtensionExtension

First Order Ambisonic (FOA) directivity transformer

Description

Adjust the soundfield directivity of a First Order Ambisonic signal (B-format) along the y-axis.

NOTE: FoaDirectY is usually called via the convenience wrapper FoaTransform.

Class Methods

.ar

Arguments:

in

The B-format signal, an array: [w, x, y, z]

angle

The distortion angle, in radians. 0 to pi/2

mul

Output will be multiplied by this value.

add

This value will be added to the output.

Discussion:

Angle = 0 retains the current directivity of the soundfield. Increasing angle towards pi/2 decreases the directivity along the y-axis, reducing the gain on this axis to zero, and is equivalent to a spatial low-pass filter. The resulting image becomes directionless on the y-axis.

 


DirectY imaging
NOTE: Corresponding matrix transformer: FoaXformerMatrix: *newDirectY

Examples

Transforming-FOA.