ExtensionApply press to a First Order Ambisonic signal (B-format) along an arbitrary axis.
| in | 
 The B-format signal, an array: [w, x, y, z]  | 
| angle | 
 The distortion angle, in radians. -pi/2 to pi/2  | 
| theta | 
 Azimuth, in radians.  | 
| phi | 
 Elevation, in radians.  | 
| mul | 
 Output will be multiplied by this value.  | 
| add | 
 This value will be added to the output.  | 
Applies press along the axis defined by theta and phi. See FoaPressX.