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-rw-r--r--doc/filters.texi6
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 2d2754c1c1..15acae9709 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1436,10 +1436,10 @@ It accepts the following parameters:
@table @option
@item zeros, z
-Set numerator/zeros coefficients.
+Set B/numerator/zeros/reflection coefficients.
@item poles, p
-Set denominator/poles coefficients.
+Set A/denominator/poles/ladder coefficients.
@item gains, k
Set channels gains.
@@ -1454,6 +1454,8 @@ Set output gain.
Set coefficients format.
@table @samp
+@item ll
+lattice-ladder function
@item sf
analog transfer function
@item tf