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`transform: transpose;` turns the filter into its transpose:
*A*
becomes
*A*^{T}
,
*B*
becomes
*C*^{T}
,
*B*
becomes
*C*^{T}
, and
*D*
is unchanged.
This in a way interchanges input and output of the filter. The transfer
function is not changed by this action. For example: a ladder filter with
damping at the input will become a ladder filter with damping at the
output.

2009-06-03