diff --git a/README.md b/README.md
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+# Projet recorder.
+
+Le but du projet est d"échanger de l'infomation entre deux PC en utilisant le son.
+
+Une machine génère le son (via minimodem), le joue et l'autre l'écoute et décode le message.
+
+Recorder analyse le son isole les fréquences dominantes et les tradit en 0 ou 1.
+Il en sort un chaine binaire, qui est alors décodé dans le message original.
+
+```$  ./recorder.py -h
+    ____                           __         
+   / __ \___  _________  _________/ /__  _____
+  / /_/ / _ \/ ___/ __ \/ ___/ __  / _ \/ ___/
+ / _, _/  __/ /__/ /_/ / /  / /_/ /  __/ /    
+/_/ |_|\___/\___/\____/_/   \__,_/\___/_/     
+
+                Author: Snorky
+                Version : 0.1                                
+
+usage: recorder.py [-h] [-s] [-i DEVICE_INDEX] [-r RATE] [-l LENGTH_FRAME] [-p OUTPUT_NAME] [-v]
+
+options:
+  -h, --help            show this help message and exit
+  -s, --show_devices    List of audio devices currently available for use.
+  -i DEVICE_INDEX, --device_index DEVICE_INDEX
+                        Index of input audio device. (Default: -1)
+  -r RATE, --rate RATE  Rate config. (Default: 16000)
+  -l LENGTH_FRAME, --length_frame LENGTH_FRAME
+                        Frame size. (Default: 512)
+  -p OUTPUT_NAME, --output_name OUTPUT_NAME
+                        Name to file to store raw audio. (Default: recorder.wav)
+  -v, --verbosity       Increase logging. (Default: False)
+
+
+```
+
+## Démo:
+
+### Machine 1:
+
+```
+echo "HackThePlanet" | minimodem --tx --ascii --startbits 0 --stopbits 0.0 -f hacktheplanet.wav 8
+```
+
+Ouvrez audacity => importer => Audio et selectionner votre fichier
+
+### Machine 2:
+
+```
+./recorder.py 
+```
+
+Une fois le recorder.py en attente, cliquer sur lecture et attendre la fin de la transmission. 
+Puis Ctrl + c.
+
+Résultat:
+```
+  ./recorder.py -v
+    ____                           __         
+   / __ \___  _________  _________/ /__  _____
+  / /_/ / _ \/ ___/ __ \/ ___/ __  / _ \/ ___/
+ / _, _/  __/ /__/ /_/ / /  / /_/ /  __/ /    
+/_/ |_|\___/\___/\____/_/   \__,_/\___/_/     
+
+                Author: Snorky
+                Version : 0.1                                
+
+Args value:
+  show_devices: False
+  device_index: -1
+  rate: 16000
+  length_frame: 512
+  output_name: recorder.wav
+  verbosity: True
+Listener is running.
+Ctrl + c for quit.
+^C
+Saving wav file: /home/pierre/.cache/recorder/wave/recorder.wav.
+  ######## INFOS ########
+  Value recording = [   0    0    0 ... 2094 2321 1534]
+  Data shape: 264704
+  Rate: 16000
+  length: 16.544s
+  Path file: recorder.wav
+  Device Index: -1
+Extracting data from wav file:
+............000100101000011011000110110101100010101000010110101001100000101000110110100001100111011010100110001011100101000011.......
+Decoding message:
+...............
+Message transmitted is: HackThePlanet
+```
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diff --git a/recorder.py b/recorder.py
index f9fc86c..7c6fe09 100755
--- a/recorder.py
+++ b/recorder.py
@@ -171,6 +171,7 @@ def recording(dev_index,output_name,rate,len_frame, wave_dir_path):
         # Start recorder
         recorder.start()
         print("Listener is running.")
+        print("Ctrl + c for quit.")
 
         while True:
             # Read and append data in audio buffer