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-rw-r--r--doc/filters.texi2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 0adec4b809..aba67c7e5a 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1958,7 +1958,7 @@ Set the carrier frequency. Default is 440 Hz.
Enable a periodic beep every second with frequency @var{beep_factor} times
the carrier frequency. Default is 0, meaning the beep is disabled.
-@item sample_rate, s
+@item sample_rate, r
Specify the sample rate, default is 44100.
@item duration, d