A free software, released under GPL, that creates digital audio watermark images.
Version: 0.1.0Enscribe is free software, released under GPL, that creates digital audio watermark images.
Operating System: Linux
How does it work?
You give it an image file (JPG, PNG, WBMP) and it outputs an audio file.
The scanlines of the input image are converted into frequency components and then using an inverse Fast Fourier Transform, are converted into sound. The left side of the image is the low frequency end, and the right is the high end, up to just under the Nyquist limit if you want it.
Supported audio formats include Microsoft WAV, Apple AIFF, Sun Microsystems AU, and raw output. Raw output can also be sent to stdout.
The audio images sound like high pitch buzzing or hissing.
Music: baudline -monet Because Baudline can display stereo images in two tone color (one for right, the other for left), color can be encoded into the audio file. It's not perfect, since there are only two color axes, and it is dependent upon your viewer, but it's still pretty cool. Baudline's default axes are green and purple, but I like red and cyan on my display.
Erik Olson, the author of Baudline, had an interesting idea about encoding a third color channel using phase lag between the left and right channels. Using the "-monet" switch in Baudline activates a psuedo-third color channel based on the differences in those signals. While I'm still having trouble with getting the hues right, it still looks dang cool.
Here are the relevent switches: