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-rw-r--r--doc/filters.texi7
1 files changed, 5 insertions, 2 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 6d2672063c..48b321b621 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3004,10 +3004,13 @@ Pass the 1st input.
Pass the 2nd input.
@item o
-Pass filtered samples.
+Pass difference between desired, 2nd input and error signal estimate.
@item n
-Pass difference between desired and filtered samples.
+Pass difference between input, 1st input and error signal estimate.
+
+@item e
+Pass error signal estimated samples.
Default value is @var{o}.
@end table