echomorse 0.8.1

A Python tool to translate text to Morse code audio using various voices.

Echo-Morse

a.k.a. 摩斯電狗 (Morse the E-Dog)

A versatile tool for converting text to Morse code (CW) with customizable audio synthesis, designed for HAM radio operators and enthusiasts.

Features

• Convert text to/from Morse code notation
• Generate CW audio with customizable voices and parameters
• Support for ham radio abbreviations and prosigns (e.g. CQ, SK, AR, etc.)
• Adjustable speed, timing, and sound characteristics

For planned enhancements and upcoming features, see our TODO list.

Installation

From PyPI (Recommended)

The easiest way to install Echo-Morse is via pip:

pip install echomorse

This will install the package and make the echomorse command available in your environment.

From Source

1. Clone the repository:

   git clone https://github.com/baksili/echo-morse.git
   cd echo-morse
   

2. Install with PDM: PDM is used for managing dependencies and the project environment.

   pdm install
   

   This installs the package and its dependencies. The echomorse command will then be available within the PDM environment (e.g., via pdm run echomorse ...) or globally if you activate the PDM virtual environment or install it globally.

Basic Usage

All commands are run using the echomorse entry point. If you've installed via pip, you can simply run echomorse <command>. If you've installed from source using PDM, you can run via pdm run echomorse <command>.

Convert text to Morse code notation:

echomorse text2code "CQ DX"
# Shorter alias:
echomorse t2c "CQ DX"

Convert Morse code notation to text:

echomorse code2text ".... . .-.. .-.. --- / .-- --- .-. .-.. -.."
# Shorter alias:
echomorse c2t ".... . .-.. .-.. --- / .-- --- .-. .-.. -.."

Convert text directly to Morse code audio:

echomorse text2audio "CQ CQ DE BY1QH" --output cq_call.wav
# Shorter alias:
echomorse t2a "CQ CQ DE BY1QH" -o cq_call.wav

Direct Playback:

You can pipe the audio output directly to an audio player. ffplay (from the FFmpeg project) is recommended for its robust support for stdin streaming.

echomorse t2a "SOS" -o - | ffplay -i - -nodisp -autoexit

N.B. Unlike many other commands, afplay on macOS doesn't reliably support reading from stdin. If you're using macOS, install ffplay via Homebrew (brew install ffmpeg) for this functionality.

Convert Morse code notation directly to audio:

echomorse code2audio "... --- ..." --output sos.wav
# Shorter alias:
echomorse c2a "... --- ..." -o sos.wav

Direct Playback:

Using ffplay:

echomorse c2a "TEST" -o - | ffplay -i - -nodisp -autoexit

List available voices:

echomorse list-voices
# Show detailed information about each voice:
echomorse list-voices --detailed

Piping Examples

Echo-Morse commands are designed to work with Unix-style pipes. Input arguments for text or Morse code can be piped from stdin.

# Convert text to Morse code via pipe, then to audio
echo "HELLO WORLD" | echomorse t2c | echomorse c2a -o pipe_hw.wav

# Process text from a file using cat and pipe to text2audio
cat message.txt | echomorse t2a -o message_from_file.wav --wpm 25

# Save Morse code to a file, then pipe its content to code2audio
echo "TEST" | echomorse t2c > morse_output.txt
cat morse_output.txt | echomorse c2a -o audio_from_morse_file.wav

Command Options and Help

All commands and subcommands support -h or --help for detailed usage information:

echomorse -h
echomorse text2audio -h

Common audio generation options:

# Specify a voice and speed (WPM)
echomorse t2a "SOS" --voice dog_bark --wpm 15 -o sos_dog.wav

# Control fade type and value (e.g., 10% fade)
echomorse t2a "HELLO" --fade-type percentage --fade-value 10 -o hello_fade_p.wav

# Control fade type and value (e.g., 15ms absolute fade)
echomorse t2a "WORLD" --fade-type absolute --fade-value 15 -o world_fade_abs.wav

# Set the normalization level (in dBFS)
echomorse t2a "CQ" --target-dbfs -18 -o cq_louder.wav

# Adjust pattern matching probability for voices with sequence patterns
echomorse t2a "CQ DE BY1QH" --voice dog_bark --pattern-chance 0.5 -o cq_dog_less_pattern.wav

Voice System Explained

The voice system allows for customizable audio outputs beyond simple tones. Each voice is a collection of audio files and configuration settings.

Voices are stored in the audio directory with each voice in its own subdirectory (e.g., audio/my_custom_voice/).

Each voice directory must contain:

1. A voice_config.json configuration file.
2. Audio files (e.g., .wav) referenced in the configuration.

Voice Configuration (voice_config.json)

Defines:

• Basic voice metadata (name, description).
• Audio files for Morse elements (e.g., dot, dash).
• Optional sequence_patterns for mapping specific Morse sequences (like ... --- ...) to custom audio files (e.g., a single recording of "SOS").

Example:

{
  "name": "my_voice",
  "description": "My custom voice for Morse code",
  "elements": {
    "dot": "dot_sound.wav",
    "dash": "dash_sound.wav",
    "custom_sos_sound": "sos_recording.wav" // A full recording for SOS
  },
  "sequence_patterns": {
    "custom_sos_sound": "... --- ..." // Maps the Morse for SOS to the element key "custom_sos_sound"
  }
}

License

MIT License