SuperCollider CLASSES (extension)

FoaDirect
ExtensionExtension

First Order Ambisonic (FOA) directivity transformer
Inherits from: Object

Description

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

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

Class Methods

*ar (in, angle: 0, theta: 0, phi: 0, 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

theta

Azimuth for the normal to the plane, in radians.

phi

Elevation for the normal to the plane, in radians.

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 normal defined by theta and phi, reducing the gain on this normal to zero, and is equivalent to a spatial low-pass filter. The resulting image becomes directionless on the normal.

NOTE: Corresponding matrix transformer: FoaXformerMatrix: *newDirect

Inherited class methods

Instance Methods

Inherited instance methods

Examples

Please see various examples here.

helpfile source: /usr/local/share/SuperCollider/Extensions/SC3plugins/ATK/HelpSource/Classes/FoaDirect.schelp
link::Classes/FoaDirect::
sc version: 3.9dev