diff --git a/examples/sample.pyradiorc b/examples/sample.pyradiorc
index 2b0a06a..68c2cc9 100644
--- a/examples/sample.pyradiorc
+++ b/examples/sample.pyradiorc
@@ -16,3 +16,10 @@ bbcws	rtsp://rmlive.bbc.co.uk/bbc-rbs/rmlive/ev7/live24/worldservice/liveinfent.
 bbc3	rtsp://rmlive.bbc.co.uk/bbc-rbs/rmlive/ev7/live24/radio3/live/r3_dsat_g2.ra	256
 bbc4	rtsp://rmlive.bbc.co.uk/bbc-rbs/rmlive/ev7/live24/radio4/live/r4_dsat_g2.ra	256
 
+# lines starting with # is ignored OR
+# lines without exactly two tabs \t in it is ignored
+# lines with \t<variable>\t<value> becomes a global variable
+# lines with <name>\t<url>\t<bytes-cached> become a station
+# <bytes-cached> must be 32 or larger
+# positve <bytes-cached>  ( 32) are stream urls
+# negative <bytes-cached> (-32) are playlist urls