doc/filters: add one lowpass filter example
authorPaul B Mahol <onemda@gmail.com>
Sat, 29 Apr 2017 09:44:21 +0000 (11:44 +0200)
committerPaul B Mahol <onemda@gmail.com>
Sat, 29 Apr 2017 09:44:21 +0000 (11:44 +0200)
Signed-off-by: Paul B Mahol <onemda@gmail.com>
doc/filters.texi

index 2fe7ff7..d49fec1 100644 (file)
@@ -3002,6 +3002,15 @@ The default is 0.707q and gives a Butterworth response.
 Specify which channels to filter, by default all available are filtered.
 @end table
 
+@subsection Examples
+@itemize
+@item
+Lowpass only LFE channel, it LFE is not present it does nothing:
+@example
+lowpass=c=LFE
+@end example
+@end itemize
+
 @anchor{pan}
 @section pan