1 files changed, 6 insertions, 0 deletions
diff --git a/README b/README
index 45912f9..838b682 100644
--- a/README
+++ b/README
@@ -132,4 +132,10 @@ ICON :  250 icon state 'auto'
         252 icon state 'off'
 *       501 unknown command
 
+Spectrum analyzer visualization
+-------------------------------
+This plugin can show a spectrum analyzer visualization on audio playback.
+As middleware you need the 'Sp'ectrum 'An'alyzer Plugin.
+
+See also http://lcr.vdr-developer.org/htmls/span-plugin.html