cardre / morsewav.py

A morse code wav file generator in python

morsewav.py

A morse code wav file generator written in python by Cary Dreelan VK5CD

• GNU GPL Licensed
• Based on version at http://svn.python.org/projects/python/trunk/Demo/scripts/morse.py

Improvements:

• Adding key click filter (ramp amplitude up/down)
• Cached sinusodial waves for faster performance
• More command line options:
• • Specify sample rate
• • Frequency of morse signal
• • Amplitude of signal
• • Words per minute
• • Letter spacing as percentage (allowing Farnsworth style)

Command line options

• -o outfile # name/path of file to create
• -f morse_freq_hz # Frequency in hz of tones to generate, default 850 Hz
• -s sample_rate # of wav file, default 22050 Hz
• -w words_per_minute # default is 25 wpm
• -a amplitude # 0 (silence) to 32767 (loudest), default 30000
• -l letter spacing % # Default is 100%, increase for Farnsworth style
• -v verbose # Output details about what is to be generated, including morse representation
• [ words ] # Actual words to be converted, either as cmd line options, or can be stdin

Examples

Generate 'hello_world.wav' test file with default parameters in current directory:

./morsewav.py -o hello_world.wav hello world

Convert a book text file into a morse wav file with additional letter spacing (eg. Farnsworth style)

cat book.txt | ./morsewav.py -o book.wav -l 200