Dunno what I was smoking when I wrote that reverse spectrogram experiments page – this is what a reverse spectrogram should be. Image goes in, spookytunes come out.
This is an offshoot of the Acoustic QR Code malarkey.
Satisfaction. I may augment this later.
If you're using a pleb browser that won't run this, here's a tantalizing glimpse of what you're missing out on:
This is the output of my browser spectrogram (just inverted colours).