Translate Morse Code

Python script to convert WAV audio files containing Morse code into readable text.

Description

translate-morse.py tool can:

• Analyze WAV audio files containing Morse code sounds
• Detect short (dot) and long (dash) beeps
• Convert Morse code to plain text
• Support letters A-Z and numbers 0-9

Requirements

Dependencies

Make sure you have installed the following library:

pip install pydub

System Requirements

• Python 3.x
• WAV format audio files
• pydub library for audio processing

Usage

1. File Preparation

Ensure you have a WAV audio file containing Morse code. The file should:

• Format: WAV only (other formats not supported)
• Content: Clear beeps of different durations (short for dots, long for dashes)
• Quality: Good audio quality with distinct pauses between letters and words
• Channel: Will be automatically converted to mono during processing

2. Running the Script

The script uses interactive input for file selection. Simply run:

python translate-morse.py

You'll see the ASCII art header and then be prompted:

Masukkan path file audio Morse (.wav):

Enter the path to your WAV file. Examples:

• morse.wav (file in current directory)
• /home/user/audio/morse.wav (absolute path)
• ../audio/morse.wav (relative path)

3. Output

The script will display:

1. Kode Morse: Raw morse code with dots (.) and dashes (-)
2. Hasil Decode: Final translated text in uppercase

The script will produce two outputs:

1. Morse Code: Representation of dot (.) and dash (-) symbols
2. Decoded Result: Translated text

Example

# Run with morse.wav file
python translate-morse.py

Example Output:

Morse Code: .... . .-.. .-.. ---   .-- --- .-. .-.. -..
Decoded Result: HELLO WORLD

Configuration Parameters

The script uses the following adjustable parameters:

• min_silence_len=50: Minimum silence duration for detection (ms)
• silence_thresh=-40: Threshold to detect silence (dB)
• Beep duration:
  • < 100ms: Dot (.)
  • >= 100ms: Dash (-)
• Pause duration:
  • 150-300ms: Pause between letters
  • >= 300ms: Pause between words

Troubleshooting

Error "ModuleNotFoundError: No module named 'pydub'"

pip install pydub

Audio not detected correctly

• Ensure WAV file quality is good
• Adjust silence_thresh (higher value for noisy audio)
• Adjust min_silence_len if pauses are too short or long

Inaccurate decode result

• Check audio file quality
• Adjust duration thresholds for dot/dash
• Ensure proper pauses between letters and words

Supported Morse Code Structure

Letters (A-Z)

A: .-    B: -...  C: -.-.  D: -..
E: .     F: ..-. G: --.   H: ....
I: ..    J: .--- K: -.-   L: .-..
M: --    N: -.   O: ---   P: .--.
Q: --.-  R: .-.  S: ...   T: -
U: ..-   V: ...- W: .--   X: -..-
Y: -.--  Z: --..

Numbers (0-9)

0: -----  1: .----  2: ..---  3: ...--  4: ....-
5: .....  6: -....  7: --...  8: ---..  9: ----.

Contribution

To contribute or report bugs:

1. Fork this repository
2. Create a branch for a new feature
3. Commit your changes
4. Push to the branch
5. Create a Pull Request

License

This script is intended for educational and IDN CTF (Capture The Flag) purposes.