diff --git a/Makefile b/Makefile
index e8e99f7..cdc1d82 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,6 @@ README.html: README.md
 	    $< -o $@
 
 liquidsoap/brownnoise.mp3:
-	sox -c2 -r44100 -n -t wav - synth 0.2 brownnoise vol 1.0 > liquidsoap/brownnoise.wav
+	sox -c2 -r44100 -n -t wav - synth 10.0 brownnoise vol 1.0 > liquidsoap/brownnoise.wav
 	ffmpeg -i liquidsoap/brownnoise.wav liquidsoap/brownnoise.mp3
 	rm liquidsoap/brownnoise.wav