--On 27 January 2012 21:24 +0000 Richard <[email protected]> wrote:
So, could you possibly advise me what changes were made to the Matrix?
After a paragraph explaining how four cardioid or hypercardioid microphones
can be used to generate W, X and Y by simple addition, the paper goes on:
"For pairwise panning, the particular option currently being used by the
BBC is conveniently expressed in matrix format as:"
<http://cassland.org/images/BBC's_HJ_encoding_matrix_for_pairwise_panning.png>
"With coincident groups of four microphones, sources on the perimeter of
the quad stage are correctly encoded by [the given matrix] if Lf, Rf, Lb,
Rb are the signal feeds from four, coincident, orthogonal 135 degree
hypercardioid microphones. [The matrix] may then also be expressed as:"
<http://cassland.org/images/BBC's_HJ_encoding_matrix_for_pairwise_panning_(polar).png>
"where [theta] = source azimuth measured anti-clockwise from the
centre-front position."
Paul
--
Paul Hodges
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