diff --git a/README.md b/README.md
index 09383e8232dba9a0853071fc9885ee9c3097eb9f..9cdb4b0be7f6f63937da8f8d02a5eabe5039e3bc 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,21 @@
 Install
 =======
 
+Need libsndfile library:
 
-Need libsndfile:
+- Mac OSX: `brew install libsndfile`
 
-OSX
----
+Ubuntu/Raspbian: `sudo apt-get install libsndfile`
+ 
+Usage
+=====
 
-    brew install libsndfile
+Playing sound
+-------------
 
-Ubuntu
-------
+`i_sndfile -f toto.mp3 |  o_sound.sh` play the sound of the mp3 on the default speaker.
 
-    sudo apt-get install libsndfile
- 
- 
\ No newline at end of file
+Recording sound
+---------------
+
+`i_sound.sh | o_sndfile -f toto.mp3` records the sound from the default microphone in a mp3 file.