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-rw-r--r--doc/filters.texi5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 3783a8a421..ceeee0e785 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -19374,6 +19374,11 @@ Set the value displayed by the gauge. Valid values are @code{momentary} and s
@code{shortterm}. By default the momentary value will be used, but in certain
scenarios it may be more useful to observe the short term value instead (e.g.
live mixing).
+
+@item scale
+Sets the display scale for the loudness. Valid parameters are @code{absolute}
+(in LUFS) or @code{relative} (LU) relative to the target. This only affects the
+video output, not the summary or continuous log output.
@end table
@subsection Examples