usmsg (ultrasound message) - hide messages in songs!

• ffmpeg
• numpy
• scipy

Be sure to have ffmpeg installed and in $PATH.

git clone https://github.com/imborge/usmsg.git
cd umsg
pip -r requirements.txt

python usmsg.py -e -i input_file.wav -o output_file.wav -t "Hello, what's up?"

python usmsg.py -d -i input_file.wav

All characters encoded lasts for one second, if the hidden text is longer than the input audio, the text will be truncated (and vice versa).