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-rw-r--r--doc/filters.texi4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 502c06a20f..b0c49265e2 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1409,6 +1409,10 @@ single-precision floating-point
16-bit integers
@end table
+@item mix
+How much to use filtered signal in output. Default is 1.
+Range is between 0 and 1.
+
@item response
Show IR frequency response, magnitude and phase in additional video stream.
By default it is disabled.