2025-06-18 22:21:07 +02:00
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# Projet recorder.
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2025-06-18 22:26:28 +02:00
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Le but du projet est d'échanger de l'information entre deux PC en utilisant le son.
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2025-06-18 22:21:07 +02:00
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2025-06-18 22:26:28 +02:00
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Une machine génère le son (via minimodem), le joue (via audacity par exemple) puis l'autre l'écoute et décode le message.
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2025-06-18 22:21:07 +02:00
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2025-06-18 22:26:28 +02:00
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***Recorder*** analyse le son et isole les fréquences dominantes puis les traduit en 0 ou 1.
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Il en sort un chaine binaire, qui est alors décodé dans le message originel.
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2025-06-18 22:21:07 +02:00
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```$ ./recorder.py -h
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____ __
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/ __ \___ _________ _________/ /__ _____
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/ /_/ / _ \/ ___/ __ \/ ___/ __ / _ \/ ___/
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/ _, _/ __/ /__/ /_/ / / / /_/ / __/ /
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/_/ |_|\___/\___/\____/_/ \__,_/\___/_/
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Author: Snorky
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Version : 0.1
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usage: recorder.py [-h] [-s] [-i DEVICE_INDEX] [-r RATE] [-l LENGTH_FRAME] [-p OUTPUT_NAME] [-v]
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options:
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-h, --help show this help message and exit
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-s, --show_devices List of audio devices currently available for use.
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-i DEVICE_INDEX, --device_index DEVICE_INDEX
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Index of input audio device. (Default: -1)
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-r RATE, --rate RATE Rate config. (Default: 16000)
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-l LENGTH_FRAME, --length_frame LENGTH_FRAME
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Frame size. (Default: 512)
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-p OUTPUT_NAME, --output_name OUTPUT_NAME
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Name to file to store raw audio. (Default: recorder.wav)
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-v, --verbosity Increase logging. (Default: False)
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```
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## Démo:
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### Machine 1:
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```
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echo "HackThePlanet" | minimodem --tx --ascii --startbits 0 --stopbits 0.0 -f hacktheplanet.wav 8
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```
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Ouvrez audacity => importer => Audio et selectionner votre fichier
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### Machine 2:
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```
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./recorder.py
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```
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Une fois le recorder.py en attente, cliquer sur lecture et attendre la fin de la transmission.
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2025-06-18 22:26:28 +02:00
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2025-06-18 22:21:07 +02:00
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Puis Ctrl + c.
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Résultat:
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```
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./recorder.py -v
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____ __
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/ __ \___ _________ _________/ /__ _____
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/ /_/ / _ \/ ___/ __ \/ ___/ __ / _ \/ ___/
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/ _, _/ __/ /__/ /_/ / / / /_/ / __/ /
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/_/ |_|\___/\___/\____/_/ \__,_/\___/_/
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Author: Snorky
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Version : 0.1
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Args value:
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show_devices: False
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device_index: -1
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rate: 16000
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length_frame: 512
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output_name: recorder.wav
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verbosity: True
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Listener is running.
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Ctrl + c for quit.
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^C
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Saving wav file: /home/pierre/.cache/recorder/wave/recorder.wav.
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######## INFOS ########
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Value recording = [ 0 0 0 ... 2094 2321 1534]
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Data shape: 264704
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Rate: 16000
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length: 16.544s
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Path file: recorder.wav
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Device Index: -1
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Extracting data from wav file:
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............000100101000011011000110110101100010101000010110101001100000101000110110100001100111011010100110001011100101000011.......
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Decoding message:
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...............
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Message transmitted is: HackThePlanet
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2025-06-18 22:26:28 +02:00
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```
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## BUG
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Il arrive certaines fois que le message ne se déchiffre pas.
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Le problème n'est pas necore géré ... :)
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