SuperCollider CLASSES (extension)

FoaDirectX
ExtensionExtension

First Order Ambisonic (FOA) directivity transformer
Subclasses: FoaDirectY, FoaDirectZ

Description

Adjust the soundfield directivity of a first order ambisonic signal (B-format) along the x-axis.

NOTE: FoaDirectX 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 along the x-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 x-axis.

 


DirectX imaging
NOTE: Corresponding matrix transformer: FoaXformerMatrix: *newDirectX

Inherited class methods

Instance Methods

Inherited instance methods

Examples

Please see various examples here.