Generates speaker matrices required by the Ambisonic Toolkit's first order diametric decoder, FoaDecoderMatrix: *newDiametric.^{1}
directions 
An array of directions for half of the loudspeaker feeds for the desired decoder. Specify in radians. Rank 1 arrays return pantophonic, while rank 2 arrays return periphonic. E.g.,

k 
The k factor of the decoder. May be specified as a float: 0.5 to 1.0. 
positions 
An array of positions for half of the loudspeaker feeds for the desired decoder. Specify in cartesian coordinates.

k 
The k factor of the decoder. May be specified as a float: 0.5 to 1.0. 
Answers the number of decoder dimensions: 2D or 3D.
Answers the number of loudspeaker feeds (output channels).
Answers the position of loudspeaker feeds, in cartesian coordinates.
Answers the speaker matrix
Answer k