FoaDirectO

Adjust the soundfield directivity of a first order ambisonic signal (B-format) across the origin.

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

Class Methods

*ar (in, angle, mul: 1, add: 0)

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, reducing the gains on the directional compenents to zero, and is equivalent to a spatial low-pass filter. The resulting image becomes omnidirectional or directionless.