SpectrumPrinter converts images or messages to audio signals, which can be viewed using spectrograms (with Audacity or SpectrumView).
Compile using make (make) and run:
./spectrum-printer "message"
Some additional options can be used, for instance:
./spectrum-printer "message" lines=40 min=1000 max=2000 time=400
Prints "message" using 40 lines (frequencies) ranging from 1000 to 2000 Hz, where each column takes 400ms.
You can also print images. To prepare image use ./prepare_image.sh input_file output_file height and use image=true option.
Example:
./spectrum-printer cameraman.pgm image=true min=1000 max=6000 time=100
When printing images lines option is ignored.
